Water systems
U.S. drinking water quality, system by system
Every water system below has its own dedicated page: the full list of contaminants measured in the utility's most recent annual report, each compared to its federal limit. Every figure is transcribed from the utility's own Consumer Confidence Report, cross-checked by a second model, and approved by a person.
1633
Water systems
46
States
29082
Measurements
Alabama4 systems
Alaska1 system
Arizona13 systems
- Avondale (2024)29 contaminants measured· 2 at or above the limit
- Buckeye (2024)10 contaminants measured
- Chandler (2024)54 contaminants measured· 1 at or above the limit
- Gilbert (2024)26 contaminants measured· 2 at or above the limit
- Glendale (2024)24 contaminants measured
- Goodyear (2024)25 contaminants measured· 5 at or above the limit
- Mesa (2024)22 contaminants measured
- Peoria (2024)27 contaminants measured· 1 at or above the limit
- Phoenix (2025)29 contaminants measured· 1 at or above the limit
- Scottsdale (2024)32 contaminants measured
- Tempe (2024)29 contaminants measured· 2 at or above the limit
- Tucson (2024)16 contaminants measured
- Yuma (2025)20 contaminants measured
Arkansas2 systems
California1280 systems
- Adelanto, City of — Adelanto, Ca (2023)16 contaminants measured· 1 at or above the limit
- Alameda County Water District — Fremont, Ca (2023)11 contaminants measured· 1 at or above the limit
- Alco Water Service — Salinas, Ca (2023)17 contaminants measured· 3 at or above the limit
- Alpine Springs County Water District — Alpine Meadows, Ca (2023)8 contaminants measured
- Alpine Springs Mobile Home Park — Palmdale, Ca (2023)3 contaminants measured
- Alpine Springs Mobile Home Park — Palmdale, Ca (2020)3 contaminants measured· 1 at or above the limit
- Alpine Springs Mobile Home Park — Palmdale, Ca (2021)1 contaminant measured· 1 at or above the limit
- Alpine Springs Mobile Home Park — Palmdale, Ca (2022)1 contaminant measured· 1 at or above the limit
- Alpine Water Users Association — Twin Peaks, Ca (2023)8 contaminants measured
- Amarillo Mutual Water Company — Rosemead, Ca (2023)23 contaminants measured
- Amarillo Mutual Water Company — Rosemead, Ca (2020)19 contaminants measured
- Amarillo Mutual Water Company — Rosemead, Ca (2021)19 contaminants measured
- Amarillo Mutual Water Company — Rosemead, Ca (2022)18 contaminants measured
- Antelope Park Mutual Water Company — Lancaster, Ca (2022)4 contaminants measured
- Antelope Valley East Kern Water Agency — Palmdale, Ca (2023)73 contaminants measured
- Antelope Valley East Kern Water Agency — Palmdale, Ca (2020)79 contaminants measured
- Antelope Valley East Kern Water Agency — Palmdale, Ca (2021)60 contaminants measured· 1 at or above the limit
- Antelope Valley East Kern Water Agency — Palmdale, Ca (2022)76 contaminants measured
- Aqua J. Mutual Water Company — Lancaster, Ca (2023)2 contaminants measured
- Aqua J. Mutual Water Company — Lancaster, Ca (2020)4 contaminants measured
- Aqua J. Mutual Water Company — Lancaster, Ca (2022)2 contaminants measured
- Arcata, City of — Arcata, Ca (2023)9 contaminants measured
- Armona Community Services Dist — Armona, Ca (2023)9 contaminants measured
- Aromas Water District — Aromas, Ca (2023)12 contaminants measured
- Arrowhead Villas Mutual Service Company — Skyforest, Ca (2023)19 contaminants measured· 1 at or above the limit
- Arvin Community Services Dist — Arvin, Ca (2022)9 contaminants measured
- Atascadero Mutual Water Co — Atascadero, Ca (2023)24 contaminants measured· 3 at or above the limit
- Atascadero State Hospital — Atascadero, Ca (2022)23 contaminants measured· 4 at or above the limit
- Avenal, City of — Avenal, Ca (2023)18 contaminants measured· 1 at or above the limit
- Avila Beach Community Services District — Avila Beach, Ca (2023)18 contaminants measured· 1 at or above the limit
- Azusa Light and Water — Azusa, Ca (2022)14 contaminants measured· 1 at or above the limit
- Bakersfield (2024)40 contaminants measured
- Bakersfield, City of (2023)0 contaminants measured
- Bakersfield, City of (2026)0 contaminants measured
- Bakersfield, City of (2025)0 contaminants measured
- Bakman Water Company — Fresno, Ca (2023)16 contaminants measured
- Banning, City of — Banning, Ca (2022)13 contaminants measured
- Beale Air Force Base — Beale Afb, Ca (2023)9 contaminants measured
- Bear Valley Csd — Tehachapi, Ca (2022)11 contaminants measured
- Beaumont Cherry Valley Wd — Beaumont, Ca (2023)15 contaminants measured
- Bellflower - Somerset Mwc — Bellflower, Ca (2020)17 contaminants measured
- Bellflower - Somerset Mwc — Bellflower, Ca (2023)20 contaminants measured· 1 at or above the limit
- Bellflower - Somerset Mwc — Bellflower, Ca (2021)17 contaminants measured
- Bellflower - Somerset Mwc — Bellflower, Ca (2022)18 contaminants measured· 1 at or above the limit
- Bellflower Home Garden Water Company — Bellflower, Ca (2022)15 contaminants measured
- Bellflower Home Garden Water Company — Bellflower, Ca (2020)17 contaminants measured
- Bellflower Municipal Water System — Rosemead, Ca (2020)15 contaminants measured
- Bellflower Municipal Water System — Rosemead, Ca (2021)12 contaminants measured
- Bellflower Municipal Water System — Rosemead, Ca (2022)16 contaminants measured· 1 at or above the limit
- Bellflower Municipal Water System — Rosemead, Ca (2023)21 contaminants measured· 1 at or above the limit
- Beverly Hills-city, Water Dept. — Beverly Hills, Ca (2023)26 contaminants measured
- Beverly Hills-city, Water Dept. — Beverly Hills, Ca (2020)24 contaminants measured
- Beverly Hills-city, Water Dept. — Beverly Hills, Ca (2021)48 contaminants measured· 2 at or above the limit
- Beverly Hills-city, Water Dept. — Beverly Hills, Ca (2022)26 contaminants measured· 2 at or above the limit
- Big Bear City Csd — Big Bear City, Ca (2023)34 contaminants measured· 1 at or above the limit
- Bighorn - Desert View Water Agency — Yucca Valley, Ca (2023)14 contaminants measured
- Bleich Flats Mutual — Lancaster, Ca (2020)10 contaminants measured
- Blue Skies Trailor Park — Arcadia, Ca (2023)8 contaminants measured
- Blue Skies Trailor Park — Arcadia, Ca (2021)8 contaminants measured
- Blue Skies Trailor Park — Arcadia, Ca (2022)7 contaminants measured
- Blythe - City of — Blythe, Ca (2022)7 contaminants measured
- Bolinas Community Pud — Bolinas, Ca (2023)12 contaminants measured
- Boron Csd — Boron, Ca (2022)61 contaminants measured
- Borrego Wd — Borrego Springs, Ca (2022)16 contaminants measured
- Box Springs Mutual Wc — Moreno Valley, Ca (2022)23 contaminants measured· 1 at or above the limit
- Brawley, City of — Brawley, Ca (2023)19 contaminants measured
- Brentwood (2023)0 contaminants measured
- Brentwood (2025)0 contaminants measured
- Brentwood (2026)0 contaminants measured
- Brooktrails Township Csd — Willits, Ca (2023)5 contaminants measured
- Buena Vista Migrant Center (2025)0 contaminants measured
- Buena Vista Migrant Center (2023)0 contaminants measured
- Buena Vista Migrant Center (2026)0 contaminants measured
- Burbank (2024)47 contaminants measured· 4 at or above the limit
- Burbank-city, Water Dept. (2026)0 contaminants measured
- Burbank-city, Water Dept. (2025)0 contaminants measured
- Burbank-city, Water Dept. (2023)0 contaminants measured
- Burney Water District — Burney, Ca (2021)5 contaminants measured
- Cabazon Water District — Cabazon, Ca (2023)21 contaminants measured· 1 at or above the limit
- Cal Am - Antelope — Sacramento, Ca (2023)16 contaminants measured
- Cal Am - Arden — Sacramento, Ca (2023)19 contaminants measured
- Cal Am - Bass Lake — Sacramento, Ca (2023)15 contaminants measured· 2 at or above the limit
- Cal Am - Fruitridge Vista — Sacramento, Ca (2023)19 contaminants measured
- Cal Am - Lincoln Oaks — Sacramento, Ca (2023)21 contaminants measured
- Cal Am - Meadowbrook — Sacramento, Ca (2023)14 contaminants measured
- Cal Am - Oakhurst — Sacramento, Ca (2023)11 contaminants measured
- Cal Am - Parkway — Sacramento, Ca (2023)24 contaminants measured
- Cal Am - Suburban Rosemont — Sacramento, Ca (2023)26 contaminants measured
- Cal Am - West Placer — Sacramento, Ca (2023)10 contaminants measured
- Cal Am - West San Martin — Pacific Grove, Ca (2023)9 contaminants measured
- Cal Am Water Company - Monterey — Pacific Grove, Ca (2023)23 contaminants measured
- Cal American Water Co — Rosemead, Ca (2023)26 contaminants measured
- Cal American Water Company - Piru — Rosemead, Ca (2023)15 contaminants measured
- Cal American Wc - Las Posas Estates — Rosemead, Ca (2023)15 contaminants measured
- Cal American Wc - Rio Plaza — Rosemead, Ca (2023)21 contaminants measured
- Cal-am Water Company - Duarte — Rosemead, Ca (2023)25 contaminants measured
- Cal-am Water Company - Duarte — Rosemead, Ca (2020)16 contaminants measured· 1 at or above the limit
- Cal-am Water Company - Duarte — Rosemead, Ca (2021)19 contaminants measured
- Cal-am Water Company - Duarte — Rosemead, Ca (2022)17 contaminants measured· 1 at or above the limit
- Cal-am Water Company - East Pasadena — Rosemead, Ca (2020)9 contaminants measured
- Cal-am Water Company - East Pasadena — Rosemead, Ca (2021)10 contaminants measured
- Cal-am Water Company - East Pasadena — Rosemead, Ca (2022)10 contaminants measured
- Cal-am Water Company - East Pasadena — Rosemead, Ca (2023)12 contaminants measured
- Cal-am Water Coronado — Imperial Beach, Ca (2023)13 contaminants measured
- Cal-water Service Co.-chico (2026)0 contaminants measured
- Cal-water Service Co.-chico (2023)0 contaminants measured
- Cal-water Service Co.-chico (2025)0 contaminants measured
- Cal-water Service Co.-marysville — San Jose, Ca (2023)29 contaminants measured
- Cal-water Service Co.-oroville — San Jose, Ca (2023)17 contaminants measured
- Cal/am Water Company - Baldwin Hills — Rosemead, Ca (2023)23 contaminants measured
- Cal/am Water Company - Baldwin Hills — Rosemead, Ca (2020)16 contaminants measured
- Cal/am Water Company - Baldwin Hills — Rosemead, Ca (2021)16 contaminants measured
- Cal/am Water Company - Baldwin Hills — Rosemead, Ca (2022)14 contaminants measured
- Cal/am Water Company - San Marino — Rosemead, Ca (2021)18 contaminants measured
- Cal/am Water Company - San Marino — Rosemead, Ca (2023)25 contaminants measured
- Cal/am Water Company - San Marino — Rosemead, Ca (2020)27 contaminants measured
- Cal/am Water Company - San Marino — Rosemead, Ca (2022)18 contaminants measured
- Calexico, City of — Calexico, Ca (2023)10 contaminants measured
- Cali Lake Rv Resort — Marina Del Ray, Ca (2023)8 contaminants measured
- Cali Lake Rv Resort — Marina Del Ray, Ca (2020)3 contaminants measured· 1 at or above the limit
- Calif State Polytechnical Univ - Pomona — Pomona, Ca (2023)19 contaminants measured
- Calif State Polytechnical Univ - Pomona — Pomona, Ca (2020)19 contaminants measured
- Calif State Polytechnical Univ - Pomona — Pomona, Ca (2021)18 contaminants measured
- Calif State Polytechnical Univ - Pomona — Pomona, Ca (2022)18 contaminants measured
- California City, City of — California City, Ca (2023)9 contaminants measured
- California Conservation Camp #14 — Los Angeles, Ca (2023)6 contaminants measured
- California Domestic Water Company — Whittier, Ca (2021)23 contaminants measured· 3 at or above the limit
- California Domestic Water Company — Whittier, Ca (2020)20 contaminants measured· 3 at or above the limit
- California Rehabilitation Center - Norco — Norco, Ca (2022)14 contaminants measured· 3 at or above the limit
- California State Prison - Solano — Vacaville, Ca (2023)18 contaminants measured
- California State University Fresno — Fresno, Ca (2021)9 contaminants measured
- California Water Service - Bear Gulch — San Jose, Ca (2023)24 contaminants measured
- California Water Service - San Carlos — San Jose, Ca (2023)23 contaminants measured
- California Water Service - San Mateo (2026)0 contaminants measured
- California Water Service - San Mateo (2023)0 contaminants measured
- California Water Service - San Mateo (2025)0 contaminants measured
- California Water Service - Stockton — San Jose, Ca (2023)32 contaminants measured
- California Water Service Co - Westlake — San Jose, Ca (2023)26 contaminants measured
- California Water Service Co-lake Hughes — San Jose, Ca (2023)25 contaminants measured
- California Water Service Co-lake Hughes — San Jose, Ca (2020)12 contaminants measured
- California Water Service Co-lake Hughes — San Jose, Ca (2021)19 contaminants measured
- California Water Service Co-lake Hughes — San Jose, Ca (2022)18 contaminants measured
- California Water Service Co-leona Valley — San Jose, Ca (2021)23 contaminants measured
- California Water Service Co-leona Valley — San Jose, Ca (2022)23 contaminants measured
- California Water Service Co-leona Valley — San Jose, Ca (2023)17 contaminants measured
- California Water Service Co-leona Valley — San Jose, Ca (2020)22 contaminants measured· 1 at or above the limit
- California Water Service Co. - Dixon — San Jose, Ca (2023)22 contaminants measured
- California Water Service Co. - Dominguez — San Jose, Ca (2023)32 contaminants measured
- California Water Service Co. - Ela — San Jose, Ca (2023)38 contaminants measured
- California Water Service Co. - Herm/redo — San Jose, Ca (2023)32 contaminants measured
- California Water Service Co. - Palos Ver — San Jose, Ca (2023)28 contaminants measured
- California Water Service Co.-lancaster — San Jose, Ca (2023)16 contaminants measured
- California Water Service Co.-travis Afb — San Jose, Ca (2023)18 contaminants measured
- California Water Service-s San Francisco — San Jose, Ca (2023)31 contaminants measured
- California-american Larkfield (puc) — Sacramento, Ca (2023)11 contaminants measured
- Calipatria State Prison — Imperial, Ca (2021)10 contaminants measured
- Calistoga, City of — Calistoga, Ca (2021)8 contaminants measured· 3 at or above the limit
- Camarillo Water Dept — Camarillo, Ca (2023)29 contaminants measured
- Cambria Comm Services Dist — Cambria, Ca (2023)14 contaminants measured
- Camp Pendleton (north) — Camp Pendleton, Ca (2023)17 contaminants measured· 1 at or above the limit
- Camp Pendleton (south) — Camp Pendleton, Ca (2023)17 contaminants measured· 1 at or above the limit
- Camp Williams-resort Water — Manhattan Beach, Ca (2023)8 contaminants measured
- Camp Williams-resort Water — Manhattan Beach, Ca (2020)23 contaminants measured· 1 at or above the limit
- Camp Williams-resort Water — Manhattan Beach, Ca (2021)21 contaminants measured· 2 at or above the limit
- Camrosa Water District — Camarillo, Ca (2023)26 contaminants measured
- Carlsbad MWD — Carlsbad, Ca (2023)32 contaminants measured
- Carmichael Water District — Carmichael, Ca (2023)23 contaminants measured
- Carpinteria Valley Water District — Carpinteria, Ca (2023)34 contaminants measured
- Casa Dulce Estates — Agua Dulce, Ca (2021)5 contaminants measured· 1 at or above the limit
- Casa Dulce Estates — Agua Dulce, Ca (2023)7 contaminants measured
- Casa Dulce Estates — Agua Dulce, Ca (2020)5 contaminants measured
- Casa Dulce Estates — Agua Dulce, Ca (2022)8 contaminants measured
- Casitas Municipal Water Dist — Oak View, Ca (2023)13 contaminants measured
- Cayucos Beach Mutual Water Company — Cayucos, Ca (2022)9 contaminants measured
- Cci - Tehachapi — Tehachapi, Ca (2023)16 contaminants measured
- Cdcr California Health Care Facility — Stockton, Ca (2023)4 contaminants measured· 1 at or above the limit
- Cedarpines Park Mwc — Cedarpines Park, Ca (2023)10 contaminants measured
- Centerville C.s.d. — Redding, Ca (2022)7 contaminants measured
- Central Ca Womens Facility — Chowchilla, Ca (2023)12 contaminants measured· 1 at or above the limit
- Central Water District — Aptos, Ca (2023)12 contaminants measured
- Ceres, City of — Ceres, Ca (2023)15 contaminants measured
- Cerritos - City, Water Dept. — Cerritos, Ca (2023)12 contaminants measured
- Cerritos - City, Water Dept. — Cerritos, Ca (2020)13 contaminants measured
- Cerritos - City, Water Dept. — Cerritos, Ca (2021)18 contaminants measured
- Cerritos - City, Water Dept. — Cerritos, Ca (2022)13 contaminants measured
- Chico (2024)42 contaminants measured
- China Lake Naval Air Weapons Station — China Lake, Ca (2023)11 contaminants measured
- Chino Hills, City of — Chino Hills, Ca (2023)22 contaminants measured
- Chino, City of — Chino, Ca (2023)25 contaminants measured
- Chowchilla City Water Dept — Chowchilla, Ca (2021)27 contaminants measured
- Chuckawalla Valley State Prison — Blythe, Ca (2022)12 contaminants measured· 1 at or above the limit
- Chula Vista Otay (2024)16 contaminants measured
- Chula Vista Sweetwater (2024)40 contaminants measured· 4 at or above the limit
- Citrus Heights Water District — Citrus Heights, Ca (2023)20 contaminants measured
- City of Alhambra — Alhambra, Ca (2023)33 contaminants measured
- City of Anaheim — Anaheim, Ca (2023)53 contaminants measured
- City of Antioch (2024)14 contaminants measured
- City of Antioch (2025)0 contaminants measured
- City of Antioch (2026)0 contaminants measured
- City of Antioch (2023)0 contaminants measured
- City of Arcadia — Arcadia, Ca (2023)17 contaminants measured· 2 at or above the limit
- City of Arcadia — Arcadia, Ca (2022)27 contaminants measured· 2 at or above the limit
- City of Arcadia — Arcadia, Ca (2020)24 contaminants measured· 3 at or above the limit
- City of Arcadia — Arcadia, Ca (2021)24 contaminants measured· 3 at or above the limit
- City of Arroyo Grande Utilities Division — Arroyo Grande, Ca (2022)18 contaminants measured
- City of Bell Gardens — Downey, Ca (2020)16 contaminants measured
- City of Bell Gardens — Downey, Ca (2023)26 contaminants measured· 2 at or above the limit
- City of Bell Gardens — Downey, Ca (2021)16 contaminants measured
- City of Bell Gardens — Downey, Ca (2022)23 contaminants measured· 2 at or above the limit
- City of Benicia — Benicia, Ca (2023)8 contaminants measured
- City of Biggs — Biggs, Ca (2023)10 contaminants measured
- City of Brea — Brea, Ca (2022)37 contaminants measured
- City of Brea — Brea, Ca (2020)45 contaminants measured
- City of Brea — Brea, Ca (2023)36 contaminants measured
- City of Brea — Brea, Ca (2021)43 contaminants measured· 1 at or above the limit
- City of Brentwood (2024)14 contaminants measured
- City of Brisbane — Brisbane, Ca (2023)10 contaminants measured
- City of Buellton Water Division — Buellton, Ca (2023)21 contaminants measured
- City of Buena Park — Buena Park, Ca (2023)29 contaminants measured
- City of Burlingame — Burlingame, Ca (2023)9 contaminants measured
- City of Clovis (2025)0 contaminants measured
- City of Clovis (2023)0 contaminants measured
- City of Clovis (2026)0 contaminants measured
- City of Corning — Corning, Ca (2023)4 contaminants measured
- City of Cupertino (2024)23 contaminants measured
- City of Cupertino (2023)0 contaminants measured
- City of Cupertino (2025)0 contaminants measured
- City of Cupertino (2026)0 contaminants measured
- City of Daly City (2026)0 contaminants measured
- City of Daly City (2023)0 contaminants measured
- City of Daly City (2025)0 contaminants measured
- City of Davis — Davis, Ca (2023)15 contaminants measured
- City of Dixon — Dixon, Ca (2023)24 contaminants measured
- City of Dos Palos — Dos Palos, Ca (2023)4 contaminants measured· 1 at or above the limit
- City of Fairfield (2025)0 contaminants measured
- City of Fairfield (2026)0 contaminants measured
- City of Fairfield (2023)0 contaminants measured
- City of Fountain Valley — Fountain Valley, Ca (2023)28 contaminants measured
- City of Fountain Valley — Fountain Valley, Ca (2020)31 contaminants measured
- City of Fountain Valley — Fountain Valley, Ca (2021)29 contaminants measured
- City of Fountain Valley — Fountain Valley, Ca (2022)31 contaminants measured
- City of Fowler — Fowler, Ca (2023)8 contaminants measured
- City of Fresno — Fresno, Ca (2023)29 contaminants measured
- City of Fullerton (2023)0 contaminants measured
- City of Fullerton (2026)0 contaminants measured
- City of Fullerton (2025)0 contaminants measured
- City of Garden Grove — Garden Grove, Ca (2023)42 contaminants measured· 1 at or above the limit
- City of Grass Valley — Grass Valley, Ca (2023)13 contaminants measured
- City of Grover Beach Public Works Dept — Grover Beach, Ca (2023)15 contaminants measured
- City of Gustine — Gustine, Ca (2022)9 contaminants measured· 1 at or above the limit
- City of Hayward (2025)0 contaminants measured
- City of Hayward (2023)0 contaminants measured
- City of Hayward (2026)0 contaminants measured
- City of Hemet (2024)30 contaminants measured· 3 at or above the limit
- City of Huntington Beach (2023)0 contaminants measured
- City of Huntington Beach (2026)0 contaminants measured
- City of Huntington Beach (2024)0 contaminants measured
- City of Industry Waterworks Systems — La Puente, Ca (2023)27 contaminants measured
- City of Industry Waterworks Systems — La Puente, Ca (2020)17 contaminants measured
- City of Industry Waterworks Systems — La Puente, Ca (2021)29 contaminants measured
- City of Industry Waterworks Systems — La Puente, Ca (2022)26 contaminants measured
- City of La Habra — La Habra, Ca (2023)27 contaminants measured
- City of La Palma — La Palma, Ca (2022)37 contaminants measured· 1 at or above the limit
- City of La Palma — La Palma, Ca (2021)34 contaminants measured
- City of La Palma — La Palma, Ca (2023)31 contaminants measured
- City of La Palma — La Palma, Ca (2020)38 contaminants measured
- City of Lathrop — Lathrop, Ca (2023)31 contaminants measured· 2 at or above the limit
- City of Lincoln — Lincoln, Ca (2023)30 contaminants measured· 2 at or above the limit
- City of Live Oak — Live Oak, Ca (2022)11 contaminants measured· 1 at or above the limit
- City of Livingston — Livingston, Ca (2023)14 contaminants measured
- City of Los Banos — Los Banos, Ca (2023)17 contaminants measured
- City of Madera — Madera, Ca (2023)30 contaminants measured
- City of Martinez (2024)14 contaminants measured
- City of Martinez (2025)0 contaminants measured
- City of Martinez (2026)0 contaminants measured
- City of Martinez (2023)0 contaminants measured
- City of Menifee (2024)30 contaminants measured· 3 at or above the limit
- City of Merced — Merced, Ca (2023)27 contaminants measured
- City of Millbrae — Millbrae, Ca (2021)17 contaminants measured· 1 at or above the limit
- City of Milpitas — Milpitas, Ca (2023)31 contaminants measured
- City of Modesto - Salida — Modesto, Ca (2023)10 contaminants measured
- City of Morgan Hill — Morgann Hill, Ca (2023)22 contaminants measured
- City of Mountain House — Mountain House, Ca (2023)38 contaminants measured· 1 at or above the limit
- City of Mountain View — Mountain View, Ca (2023)36 contaminants measured
- City of Murrieta (2024)30 contaminants measured· 3 at or above the limit
- City of Newman-water Department — Newman, Ca (2023)10 contaminants measured· 1 at or above the limit
- City of Newport Beach — Newport Beach, Ca (2023)36 contaminants measured· 1 at or above the limit
- City of Orange — Orange, Ca (2022)28 contaminants measured· 1 at or above the limit
- City of Orange Cove — Orange Cove, Ca (2023)9 contaminants measured· 1 at or above the limit
- City of Palo Alto — Palo Alto, Ca (2023)9 contaminants measured
- City of Parlier — Parlier, Ca (2023)14 contaminants measured· 1 at or above the limit
- City of Paso Robles Water Division — Paso Robles, Ca (2023)31 contaminants measured· 1 at or above the limit
- City of Pittsburg (2026)0 contaminants measured
- City of Pittsburg (2025)0 contaminants measured
- City of Pittsburg (2024)14 contaminants measured
- City of Pittsburg (2023)0 contaminants measured
- City of Pleasanton — Pleasanton, Ca (2023)34 contaminants measured· 3 at or above the limit
- City of Red Bluff — Red Bluff, Ca (2023)17 contaminants measured· 1 at or above the limit
- City of Redding — Redding, Ca (2023)20 contaminants measured· 2 at or above the limit
- City of Redwood City — Redwood City, Ca (2023)30 contaminants measured
- City of Rio Vista — Rio Vista, Ca (2022)16 contaminants measured
- City of Roseville — Roseville, Ca (2023)24 contaminants measured
- City of Sacramento Main — Sacramento, Ca (2023)15 contaminants measured
- City of San Bruno — San Bruno, Ca (2023)23 contaminants measured
- City of San Clemente — San Clemente, Ca (2020)28 contaminants measured
- City of San Clemente — San Clemente, Ca (2023)33 contaminants measured
- City of San Clemente — San Clemente, Ca (2021)29 contaminants measured
- City of San Clemente — San Clemente, Ca (2022)32 contaminants measured
- City of San Jacinto (2024)30 contaminants measured· 3 at or above the limit
- City of San Jose - Evg/edv/coy (2023)0 contaminants measured
- City of San Jose - Evg/edv/coy (2025)0 contaminants measured
- City of San Jose - Evg/edv/coy (2026)0 contaminants measured
- City of San Jose - Nsj/alviso — San Jose, Ca (2023)17 contaminants measured· 1 at or above the limit
- City of Sanger — Sanger, Ca (2023)23 contaminants measured
- City of Santa Ana (2023)0 contaminants measured
- City of Santa Ana (2025)0 contaminants measured
- City of Santa Ana (2026)0 contaminants measured
- City of Santa Barbara Water Department — Santa Barbara, Ca (2023)30 contaminants measured
- City of Santa Clara (2026)0 contaminants measured
- City of Santa Clara (2023)0 contaminants measured
- City of Santa Maria Utilities Department — Santa Maria, Ca (2023)20 contaminants measured
- City of Santa Paula — Santa Paula, Ca (2023)14 contaminants measured
- City of Seal Beach — Seal Beach, Ca (2023)31 contaminants measured
- City of Seal Beach — Seal Beach, Ca (2020)39 contaminants measured
- City of Seal Beach — Seal Beach, Ca (2021)35 contaminants measured
- City of Seal Beach — Seal Beach, Ca (2022)40 contaminants measured
- City of Shasta Lake — Shasta Lake, Ca (2022)12 contaminants measured· 1 at or above the limit
- City of South Pasadena — South Pasadena, Ca (2022)29 contaminants measured
- City of South Pasadena — South Pasadena, Ca (2023)23 contaminants measured· 1 at or above the limit
- City of Stockton (2026)0 contaminants measured
- City of Stockton (2025)0 contaminants measured
- City of Stockton (2023)0 contaminants measured
- City of Sunnyvale (2023)0 contaminants measured
- City of Sunnyvale (2026)0 contaminants measured
- City of Sunnyvale (2025)0 contaminants measured
- City of Thousand Oaks Water Department (2023)0 contaminants measured
- City of Thousand Oaks Water Department (2025)0 contaminants measured
- City of Thousand Oaks Water Department (2026)0 contaminants measured
- City of Tustin — Tustin, Ca (2022)45 contaminants measured
- City of Vacaville (2026)0 contaminants measured
- City of Vacaville (2023)0 contaminants measured
- City of Vacaville (2025)0 contaminants measured
- City of Vallejo (2025)0 contaminants measured
- City of Vallejo (2023)0 contaminants measured
- City of Vallejo (2026)0 contaminants measured
- City of West Sacramento — West Sacramento, Ca (2022)16 contaminants measured· 2 at or above the limit
- City of Westminster — Westminster, Ca (2023)34 contaminants measured
- City of Wheatland — Wheatland, Ca (2022)12 contaminants measured
- City of Winters — Winters, Ca (2020)6 contaminants measured
- City of Woodland — Woodland, Ca (2023)18 contaminants measured
- City of Yuba City — Yuba City, Ca (2023)18 contaminants measured
- Clawa — Crestline, Ca (2023)15 contaminants measured
- Clear Creek Csd-anderson — Anderson, Ca (2021)7 contaminants measured
- Clovis (2024)14 contaminants measured
- Coachella Vwd: Cove Community — Palm Desert, Ca (2023)28 contaminants measured
- Coachella Vwd: I.d. No. 8 — Palm Desert, Ca (2023)27 contaminants measured
- Coachella Water Authority — Coachella, Ca (2022)11 contaminants measured
- Coalinga-city — Coalinga, Ca (2023)20 contaminants measured
- Coastside County Water District — Half Moon Bay, Ca (2023)11 contaminants measured
- Colorado Mutual Water Company — Lancaster, Ca (2023)9 contaminants measured
- Colorado Mutual Water Company — Lancaster, Ca (2021)8 contaminants measured
- Colorado Mutual Water Company — Lancaster, Ca (2022)8 contaminants measured
- Colton, City of — Colton, Ca (2023)22 contaminants measured· 2 at or above the limit
- Commerce-city, Water Dept. — San Jose, Ca (2023)40 contaminants measured
- Commerce-city, Water Dept. — San Jose, Ca (2020)24 contaminants measured
- Commerce-city, Water Dept. — San Jose, Ca (2021)25 contaminants measured· 2 at or above the limit
- Commerce-city, Water Dept. — San Jose, Ca (2022)31 contaminants measured
- Compton-city, Water Dept. — Compton, Ca (2023)23 contaminants measured· 1 at or above the limit
- Concord (2024)15 contaminants measured
- Contra Costa Water District (2026)0 contaminants measured
- Contra Costa Water District (2023)0 contaminants measured
- Contra Costa Water District (2025)0 contaminants measured
- Corcoran, City of — Corcoran, Ca (2023)17 contaminants measured
- Corona, City of — Corona, Ca (2023)23 contaminants measured· 2 at or above the limit
- Correctional Training Facility - Soledad — Soledad, Ca (2023)8 contaminants measured
- Costa Mesa (2024)37 contaminants measured
- Cotati, City of — Cotati, Ca (2023)56 contaminants measured
- Cottonwood Water District — Cottonwood, Ca (2022)6 contaminants measured
- Covina Irrigating Co. — West Covina, Ca (2023)66 contaminants measured
- Covina Irrigating Co. — West Covina, Ca (2020)64 contaminants measured
- Covina Irrigating Co. — West Covina, Ca (2021)59 contaminants measured
- Covina-city, Water Dept. (2025)0 contaminants measured
- Covina-city, Water Dept. (2023)0 contaminants measured
- Covina-city, Water Dept. (2026)0 contaminants measured
- Crescenta Valley Cwd — La Crescenta, Ca (2022)37 contaminants measured· 4 at or above the limit
- Crescenta Valley Cwd — La Crescenta, Ca (2021)29 contaminants measured· 1 at or above the limit
- Crestline Village Cwd - Division 10 — Crestline, Ca (2023)12 contaminants measured· 2 at or above the limit
- Crestview Mutual Water Co — Camarillo, Ca (2023)25 contaminants measured
- Cucamonga Valley Water District — Rancho Cucamonga, Ca (2023)16 contaminants measured
- Cutler Pud — Cutler, Ca (2023)16 contaminants measured
- Cuyamaca Water District — Julian, Ca (2021)4 contaminants measured
- Cws - Bakersfield — San Jose, Ca (2023)40 contaminants measured
- Cws - Kernville — San Jose, Ca (2023)33 contaminants measured· 1 at or above the limit
- Cws - North Garden — San Jose, Ca (2023)37 contaminants measured
- Cws - Selma — San Jose, Ca (2023)22 contaminants measured
- Cws - Visalia (2026)0 contaminants measured
- Cws - Visalia (2023)0 contaminants measured
- Cws - Visalia (2025)0 contaminants measured
- Cwsc King City — San Jose, Ca (2023)20 contaminants measured
- Cwsc Las Lomas — San Jose, Ca (2023)19 contaminants measured
- Cwsc Los Altos Suburban — San Jose, Ca (2023)26 contaminants measured
- Cwsc Oak Hills — San Jose, Ca (2023)19 contaminants measured
- Cwsc Salinas (2023)0 contaminants measured
- Cwsc Salinas (2025)0 contaminants measured
- Cwsc Salinas (2026)0 contaminants measured
- Cwsc Salinas Hills — San Jose, Ca (2023)22 contaminants measured
- Daly City (2024)31 contaminants measured
- Del Mar, City of — Del Mar, Ca (2023)20 contaminants measured
- Del Oro Water Co.-paradise Pines — Chico, Ca (2023)14 contaminants measured
- Del Rio Mutual — El Monte, Ca (2020)16 contaminants measured
- Del Rio Mutual — El Monte, Ca (2022)26 contaminants measured· 2 at or above the limit
- Del Rio Mutual — El Monte, Ca (2023)27 contaminants measured· 2 at or above the limit
- Del Rio Mutual — El Monte, Ca (2021)21 contaminants measured· 2 at or above the limit
- Delano, City of — Delano, Ca (2023)26 contaminants measured· 7 at or above the limit
- Delhi Cwd — Delhi, Ca (2023)3 contaminants measured
- Denair Community Services District — Denair, Ca (2023)17 contaminants measured· 1 at or above the limit
- Desert Water Agency — Palm Springs, Ca (2023)14 contaminants measured· 2 at or above the limit
- Diablo Water District (2024)15 contaminants measured
- Dinuba, City of — Dinuba, Ca (2023)14 contaminants measured
- Downey (2024)36 contaminants measured· 2 at or above the limit
- Downey - City, Water Dept. — Downey, Ca (2023)35 contaminants measured· 2 at or above the limit
- Dublin San Ramon Services District — Pleasanton, Ca (2023)15 contaminants measured
- East Bay Mud (2025)0 contaminants measured
- East Bay Mud (2024)0 contaminants measured
- East Bay Mud (2026)0 contaminants measured
- East Bay Mud (ebmud) — Oakland, Ca (2023)29 contaminants measured
- East Niles Csd — Bakersfield, Ca (2023)15 contaminants measured
- East Orange County Wd - Rz — Orange, Ca (2023)29 contaminants measured
- East Orange County Wd - Rz — Orange, Ca (2021)27 contaminants measured
- East Orange County Wd - Rz — Orange, Ca (2022)27 contaminants measured
- East Valley Service Area (2024)30 contaminants measured· 3 at or above the limit
- East Valley Water District — Highland, Ca (2023)43 contaminants measured
- Eastern Municipal Wd (2023)0 contaminants measured
- Eastern Municipal Wd (2025)0 contaminants measured
- Eastern Municipal Wd (2026)0 contaminants measured
- Eastside Water Association — Midway City, Ca (2021)6 contaminants measured
- Eastside Water Association — Midway City, Ca (2020)17 contaminants measured
- Eastside Water Association — Midway City, Ca (2022)13 contaminants measured
- Eastside Water Association — Midway City, Ca (2023)15 contaminants measured
- Edwards Afb - Main Base — Edwards Afb, Ca (2023)9 contaminants measured
- El Cajon (2024)44 contaminants measured
- El Centro, City of — El Centro, Ca (2023)21 contaminants measured
- El Dorado Id - Main — Placerville, Ca (2023)10 contaminants measured
- El Monte (2024)24 contaminants measured· 1 at or above the limit
- El Monte-city, Water Dept. (2025)0 contaminants measured
- El Monte-city, Water Dept. (2026)0 contaminants measured
- El Monte-city, Water Dept. (2023)0 contaminants measured
- El Segundo-city, Water Dept. — El Segundo, Ca (2022)21 contaminants measured· 1 at or above the limit
- El Segundo-city, Water Dept. — El Segundo, Ca (2021)16 contaminants measured· 1 at or above the limit
- El Toro Water District — Lake Forest, Ca (2022)35 contaminants measured
- El Toro Water District — Lake Forest, Ca (2023)31 contaminants measured
- El Toro Water District — Lake Forest, Ca (2020)27 contaminants measured
- El Toro Water District — Lake Forest, Ca (2021)30 contaminants measured
- Elk Grove (2024)21 contaminants measured
- Elk Grove Water District — Elk Grove, Ca (2023)21 contaminants measured
- Elsinore Valley MWD — Lake Elsinore, Ca (2022)58 contaminants measured· 5 at or above the limit
- Erskine Creek Wc — Shafter, Ca (2022)7 contaminants measured
- Escalon, City of — Escalon, Ca (2023)12 contaminants measured
- Escondido (2024)30 contaminants measured
- Escondido, City of (2025)0 contaminants measured
- Escondido, City of (2026)0 contaminants measured
- Escondido, City of (2023)0 contaminants measured
- Esparto C.s.d. — Esparto, Ca (2023)10 contaminants measured· 2 at or above the limit
- Estero Municipal Improvement District — Foster City, Ca (2023)12 contaminants measured
- Eureka, City of — Eureka, Ca (2023)14 contaminants measured
- Evergreen Mutual Water Company — Lancaster, Ca (2020)8 contaminants measured
- Evergreen Mutual Water Company — Lancaster, Ca (2023)8 contaminants measured
- Evergreen Mutual Water Company — Lancaster, Ca (2022)7 contaminants measured
- Evergreen Mutual Water Company — Lancaster, Ca (2021)12 contaminants measured
- Exeter, City of — Exeter, Ca (2023)9 contaminants measured
- Fair Oaks Water District — Fair Oaks, Ca (2022)19 contaminants measured
- Fairfield (2024)22 contaminants measured
- Fallbrook Pud — Fallbrook, Ca (2023)46 contaminants measured
- Farm Mutual W.c. (the) — Wildomar, Ca (2023)7 contaminants measured
- Farmersville, City of — Farmersville, Ca (2023)8 contaminants measured
- Fcwwd 41/shaver Lake — Fresno, Ca (2023)16 contaminants measured
- Fenner Canyon Youth Conservation Camp — Valyermo, Ca (2020)5 contaminants measured· 1 at or above the limit
- Fenner Canyon Youth Conservation Camp — Valyermo, Ca (2022)4 contaminants measured
- Fern Valley Wd (2025)0 contaminants measured
- Fern Valley Wd (2026)0 contaminants measured
- Fern Valley Wd (2023)0 contaminants measured
- Fillmore Water Dept — Fillmore, Ca (2023)45 contaminants measured
- Fire Suppression Camp #19 — Los Angeles, Ca (2023)6 contaminants measured
- Firebaugh City — Firebaugh, Ca (2023)9 contaminants measured· 2 at or above the limit
- Folsom, City of - Ashland — Folsom, Ca (2023)19 contaminants measured
- Folsom, City of - Main — Folsom, Ca (2023)19 contaminants measured
- Fontana (2024)34 contaminants measured
- Foothill Municipal Water Dist. — La Canada Flintridge, Ca (2023)126 contaminants measured· 1 at or above the limit
- Foothill Municipal Water Dist. — La Canada Flintridge, Ca (2020)7 contaminants measured
- Foothill Municipal Water Dist. — La Canada Flintridge, Ca (2022)9 contaminants measured
- Foothill Municipal Water Dist. — La Canada Flintridge, Ca (2021)9 contaminants measured
- Foresthill Public Utility Dist — Foresthill, Ca (2023)4 contaminants measured· 1 at or above the limit
- Fort Bragg, City of — Fort Bragg, Ca (2022)5 contaminants measured
- Fort Hunter Liggett — Fort Hunter Liggett, Ca (2022)15 contaminants measured· 1 at or above the limit
- Fortuna, City of — Fortuna, Ca (2021)12 contaminants measured
- Frazier Park Pud — Frazier Park, Ca (2022)17 contaminants measured
- Fremont (2024)13 contaminants measured
- Fullerton (2024)45 contaminants measured· 2 at or above the limit
- Fulton Water Company — Carnelian Bay, Ca (2023)6 contaminants measured
- Galt, City of — Galt, Ca (2023)12 contaminants measured
- Georgetown Divide Pud — Georgetown, Ca (2022)6 contaminants measured
- Gilbert Street Complex — San Bernardino, Ca (2023)13 contaminants measured
- Glen Helen Water System — San Bernardino, Ca (2023)14 contaminants measured· 1 at or above the limit
- Glendale (2024)38 contaminants measured· 4 at or above the limit
- Glendale-city, Water Dept. (2025)0 contaminants measured
- Glendale-city, Water Dept. (2026)0 contaminants measured
- Glendale-city, Water Dept. (2023)0 contaminants measured
- Glendora-city, Water Dept. — Glendora, Ca (2023)18 contaminants measured· 1 at or above the limit
- Glendora-city, Water Dept. — Glendora, Ca (2021)19 contaminants measured· 1 at or above the limit
- Glendora-city, Water Dept. — Glendora, Ca (2022)32 contaminants measured· 1 at or above the limit
- Glendora-city, Water Dept. — Glendora, Ca (2020)19 contaminants measured· 1 at or above the limit
- Golden Hills Csd — Tehachapi, Ca (2022)22 contaminants measured
- Golden Sands Mobile Home Park — Rosemead, Ca (2023)9 contaminants measured· 1 at or above the limit
- Golden Sands Mobile Home Park — Rosemead, Ca (2021)9 contaminants measured
- Golden Sands Mobile Home Park — Rosemead, Ca (2022)7 contaminants measured
- Golden Sands Mobile Home Park — Rosemead, Ca (2020)6 contaminants measured
- Golden State Water Co - Apple Vly North — Apple Valley, Ca (2023)18 contaminants measured
- Golden State Water Co - Apple Vly South — Apple Valley, Ca (2023)7 contaminants measured
- Golden State Water Co - Arden Water Serv — Rancho Cordova, Ca (2023)8 contaminants measured
- Golden State Water Co - Barstow — Apple Valley, Ca (2023)15 contaminants measured
- Golden State Water Co - Wrightwood — Apple Valley, Ca (2023)11 contaminants measured
- Golden State Water Co. - Cordova — Rancho Cordova, Ca (2023)10 contaminants measured
- Golden State Water Company (2024)15 contaminants measured
- Golden State Water Company - Edna — Hawthorne, Ca (2023)10 contaminants measured
- Golden State Water Company - Los Osos (2023)0 contaminants measured
- Golden State Water Company - Los Osos (2026)0 contaminants measured
- Golden State Water Company - Los Osos (2025)0 contaminants measured
- Golden State Water Company - Nipomo — Rancho Cordova, Ca (2023)9 contaminants measured
- Golden State Water Company - Orcutt — Hawthorne, Ca (2023)11 contaminants measured
- Golden State Water Company - Simi Valley — Rancho Cordova, Ca (2023)15 contaminants measured· 1 at or above the limit
- Golden State Water Company - Tanglewood — Hawthorne, Ca (2023)5 contaminants measured
- Golden State Water Company-cypress Ridge — Rancho Cordova, Ca (2023)12 contaminants measured
- Golden State Wc - Cowan Heights — Anaheim, Ca (2023)14 contaminants measured
- Golden State Wc - Placentia/yorba Linda — Anaheim, Ca (2023)26 contaminants measured
- Golden State Wc - Placentia/yorba Linda — Anaheim, Ca (2022)22 contaminants measured
- Golden State Wc - Placentia/yorba Linda — Anaheim, Ca (2020)17 contaminants measured
- Golden State Wc - Placentia/yorba Linda — Anaheim, Ca (2021)16 contaminants measured
- Golden State Wc - West Orange County — Anaheim, Ca (2023)20 contaminants measured
- Golden Valley Municipal Water District — Gorman, Ca (2023)11 contaminants measured
- Golden Valley Municipal Water District — Gorman, Ca (2021)12 contaminants measured
- Golden Valley Municipal Water District — Gorman, Ca (2022)10 contaminants measured
- Golden Valley Municipal Water District — Gorman, Ca (2020)12 contaminants measured
- Goleta Water District — Goleta, Ca (2023)13 contaminants measured
- Gonzales, City of — Gonzales, Ca (2022)26 contaminants measured· 1 at or above the limit
- Great Oaks Wc Inc — San Jose, Ca (2023)16 contaminants measured
- Green Valley Cwd — Green Valley, Ca (2020)16 contaminants measured
- Green Valley Cwd — Green Valley, Ca (2021)13 contaminants measured
- Green Valley Mwc — Green Valley Lake, Ca (2023)17 contaminants measured· 1 at or above the limit
- Greenfield County Wd — Bakersfield, Ca (2022)16 contaminants measured
- Gswc - Artesia — Anaheim, Ca (2023)17 contaminants measured· 1 at or above the limit
- Gswc - Artesia — Anaheim, Ca (2020)14 contaminants measured
- Gswc - Artesia — Anaheim, Ca (2021)11 contaminants measured
- Gswc - Artesia — Anaheim, Ca (2022)13 contaminants measured· 1 at or above the limit
- Gswc - Bell, Bell Gardens — Anaheim, Ca (2020)16 contaminants measured
- Gswc - Bell, Bell Gardens — Anaheim, Ca (2021)18 contaminants measured
- Gswc - Bell, Bell Gardens — Anaheim, Ca (2022)20 contaminants measured
- Gswc - Bell, Bell Gardens — Anaheim, Ca (2023)23 contaminants measured
- Gswc - Calipatria — San Dimas, Ca (2023)14 contaminants measured
- Gswc - Claremont — San Dimas, Ca (2023)20 contaminants measured
- Gswc - Claremont — San Dimas, Ca (2021)15 contaminants measured
- Gswc - Claremont — San Dimas, Ca (2022)22 contaminants measured· 1 at or above the limit
- Gswc - Claremont — San Dimas, Ca (2020)14 contaminants measured· 1 at or above the limit
- Gswc - Culver City — Anaheim, Ca (2020)13 contaminants measured
- Gswc - Culver City — Anaheim, Ca (2021)15 contaminants measured
- Gswc - Culver City — Anaheim, Ca (2022)13 contaminants measured
- Gswc - Culver City — Anaheim, Ca (2023)14 contaminants measured
- Gswc - Florence/graham — Anaheim, Ca (2023)16 contaminants measured
- Gswc - Hollydale — Anaheim, Ca (2020)12 contaminants measured· 1 at or above the limit
- Gswc - Hollydale — Anaheim, Ca (2022)9 contaminants measured
- Gswc - Hollydale — Anaheim, Ca (2023)11 contaminants measured
- Gswc - Hollydale — Anaheim, Ca (2021)12 contaminants measured· 2 at or above the limit
- Gswc - Norwalk — Anaheim, Ca (2023)20 contaminants measured
- Gswc - Norwalk — Anaheim, Ca (2020)18 contaminants measured
- Gswc - Norwalk — Anaheim, Ca (2021)19 contaminants measured
- Gswc - Norwalk — Anaheim, Ca (2022)18 contaminants measured
- Gswc - Southwest — Hawthorne, Ca (2023)15 contaminants measured
- Gswc - Willowbrook — Anaheim, Ca (2020)10 contaminants measured
- Gswc - Willowbrook — Anaheim, Ca (2022)12 contaminants measured
- Gswc - Willowbrook — Anaheim, Ca (2023)13 contaminants measured
- Gswc - Willowbrook — Anaheim, Ca (2021)10 contaminants measured
- Gswc-san Dimas — San Dimas, Ca (2023)16 contaminants measured
- Gswc-san Dimas — San Dimas, Ca (2020)14 contaminants measured
- Gswc-san Dimas — San Dimas, Ca (2021)15 contaminants measured
- Gswc-san Dimas — San Dimas, Ca (2022)16 contaminants measured
- Gswc-south Arcadia — San Dimas, Ca (2021)11 contaminants measured
- Gswc-south Arcadia — San Dimas, Ca (2022)13 contaminants measured
- Gswc-south Arcadia — San Dimas, Ca (2023)17 contaminants measured· 1 at or above the limit
- Gswc-south Arcadia — San Dimas, Ca (2020)8 contaminants measured
- Gswc-south San Gabriel — San Dimas, Ca (2023)13 contaminants measured
- Guadalupe Valley Mid — Brisbane, Ca (2023)10 contaminants measured
- Guadalupe Water Department — Guadalupe, Ca (2023)23 contaminants measured
- Hanford, City of — Hanford, Ca (2023)10 contaminants measured
- Hawthorne-city Water Dept. — San Jose, Ca (2020)17 contaminants measured
- Hawthorne-city Water Dept. — San Jose, Ca (2022)26 contaminants measured
- Hawthorne-city Water Dept. — San Jose, Ca (2023)32 contaminants measured
- Hawthorne-city Water Dept. — San Jose, Ca (2021)27 contaminants measured
- Hayward (2024)29 contaminants measured
- Healdsburg, City of — Healdsburg, Ca (2023)10 contaminants measured
- Heber Public Utility District — Heber, Ca (2023)15 contaminants measured· 1 at or above the limit
- Helendale Community Service District — Helendale, Ca (2023)7 contaminants measured
- Helix Water District — La Mesa, Ca (2023)33 contaminants measured
- Hemet, City of (2023)0 contaminants measured
- Hemet, City of (2026)0 contaminants measured
- Hemet, City of (2025)0 contaminants measured
- Heritage Ranch Csd — Paso Robles, Ca (2023)9 contaminants measured· 1 at or above the limit
- Hesperia (2024)37 contaminants measured· 3 at or above the limit
- Hesperia Wd (2023)0 contaminants measured
- Hesperia Wd (2025)0 contaminants measured
- Hesperia Wd (2026)0 contaminants measured
- Hi Desert Wd — Yucca Valley, Ca (2023)9 contaminants measured
- High Desert Detention Center — Adelanto, Ca (2023)10 contaminants measured
- Hilmar County Water District — Hilmar, Ca (2023)11 contaminants measured· 2 at or above the limit
- Holtville, City of — Holtville, Ca (2022)13 contaminants measured
- Home Gardens County Wd — Corona, Ca (2022)31 contaminants measured· 5 at or above the limit
- Hughson, City of — Hughson, Ca (2023)14 contaminants measured
- Humboldt C.s.d. — Cutten, Ca (2023)14 contaminants measured· 1 at or above the limit
- Huntington Beach (2025)38 contaminants measured· 1 at or above the limit
- Huntington Park-city, Water Dept. — Huntington Park, Ca (2022)21 contaminants measured
- Huntington Park-city, Water Dept. — Huntington Park, Ca (2021)19 contaminants measured
- Huntington Park-city, Water Dept. — Huntington Park, Ca (2023)26 contaminants measured· 1 at or above the limit
- Huron, City of — Huron, Ca (2023)7 contaminants measured· 1 at or above the limit
- Imperial, City of — Imperial, Ca (2023)14 contaminants measured
- Indian Hills Camp — Jamul, Ca (2023)9 contaminants measured· 2 at or above the limit
- Indian Wells Valley W.d. — Ridgecrest, Ca (2023)19 contaminants measured
- Indio Water Authority — Indio, Ca (2023)26 contaminants measured
- Inglewood (2023)37 contaminants measured· 1 at or above the limit
- Inglewood- City, Water Dept. (2024)0 contaminants measured
- Inglewood- City, Water Dept. (2025)0 contaminants measured
- Inglewood- City, Water Dept. (2026)0 contaminants measured
- Irvine (2023)48 contaminants measured
- Irvine Ranch Water District (2025)0 contaminants measured
- Irvine Ranch Water District (2024)0 contaminants measured
- Irvine Ranch Water District (2026)0 contaminants measured
- Ivanhoe Public Utility Dist — Ivanhoe, Ca (2023)13 contaminants measured
- Joint Regional Water Supply System — Laguna Beach, Ca (2023)34 contaminants measured
- Joint Regional Water Supply System — Laguna Beach, Ca (2020)31 contaminants measured
- Joint Regional Water Supply System — Laguna Beach, Ca (2021)30 contaminants measured
- Joint Regional Water Supply System — Laguna Beach, Ca (2022)33 contaminants measured
- Joshua Basin Water District — Joshua Tree, Ca (2023)16 contaminants measured
- Julian Community Services District — Julian, Ca (2020)6 contaminants measured
- Jurupa Valley (2023)15 contaminants measured
- Kerman, City of — Kerman, Ca (2023)14 contaminants measured
- Kern Valley State Prison — Delano, Ca (2023)9 contaminants measured· 1 at or above the limit
- Keyes Community Services Dist. — Keyes, Ca (2023)6 contaminants measured
- Kingsburg, City of — Kingsburg, Ca (2023)16 contaminants measured
- Kinneloa Irrigation Dist. — Pasadena, Ca (2023)16 contaminants measured
- Kinneloa Irrigation Dist. — Pasadena, Ca (2020)16 contaminants measured· 1 at or above the limit
- Kinneloa Irrigation Dist. — Pasadena, Ca (2021)15 contaminants measured
- Kinneloa Irrigation Dist. — Pasadena, Ca (2022)15 contaminants measured
- La Canada Irrigation Dist. — La Canada, Ca (2022)41 contaminants measured
- La Canada Irrigation Dist. — La Canada, Ca (2023)42 contaminants measured
- La Canada Irrigation Dist. — La Canada, Ca (2020)42 contaminants measured· 2 at or above the limit
- La Cumbre Mutual Water Co — Santa Barbara, Ca (2023)24 contaminants measured
- La Habra Heights Cwd — La Habra Heights, Ca (2023)17 contaminants measured· 1 at or above the limit
- La Puente Valley Cwd — La Puente, Ca (2021)29 contaminants measured
- La Puente Valley Cwd — La Puente, Ca (2023)27 contaminants measured
- La Puente Valley Cwd — La Puente, Ca (2020)16 contaminants measured
- La Puente Valley Cwd — La Puente, Ca (2022)26 contaminants measured
- La Verne, City Wd — La Verne, Ca (2023)17 contaminants measured· 1 at or above the limit
- La Verne, City Wd — La Verne, Ca (2020)16 contaminants measured· 2 at or above the limit
- La Verne, City Wd — La Verne, Ca (2022)21 contaminants measured· 1 at or above the limit
- La Verne, City Wd — La Verne, Ca (2021)16 contaminants measured· 2 at or above the limit
- Laguna Beach County Wd — Laguna Beach, Ca (2023)27 contaminants measured
- Laguna Beach County Wd — Laguna Beach, Ca (2021)32 contaminants measured
- Laguna Beach County Wd — Laguna Beach, Ca (2022)37 contaminants measured
- Laguna Beach County Wd — Laguna Beach, Ca (2020)27 contaminants measured
- Lake Arrowhead Csd — Lake Arrowhead, Ca (2023)25 contaminants measured· 2 at or above the limit
- Lake Elizabeth Mutual Water Co. — Elizabeth Lake, Ca (2020)11 contaminants measured· 1 at or above the limit
- Lake Elizabeth Mutual Water Co. — Elizabeth Lake, Ca (2023)9 contaminants measured· 2 at or above the limit
- Lake Elizabeth Mutual Water Co. — Elizabeth Lake, Ca (2022)9 contaminants measured· 1 at or above the limit
- Lake Elizabeth Mutual Water Co. — Elizabeth Lake, Ca (2021)9 contaminants measured· 1 at or above the limit
- Lake Hemet MWD — Hemet, Ca (2023)16 contaminants measured
- Lakeside Park Association — South Lake Tahoe, Ca (2023)5 contaminants measured· 1 at or above the limit
- Lakeside Wd — Lakeside, Ca (2023)30 contaminants measured· 1 at or above the limit
- Lakewood - City, Water Dept. — Lakewood, Ca (2023)8 contaminants measured· 2 at or above the limit
- Lamont Public Utility Dist — Lamont, Ca (2023)4 contaminants measured
- Lancaster Park Mobile Home Park — Lancaster, Ca (2021)8 contaminants measured· 1 at or above the limit
- Lancaster Water Company — Lancaster, Ca (2022)2 contaminants measured
- Landale Mutual Water Company — Lancaster, Ca (2023)18 contaminants measured
- Landale Mutual Water Company — Lancaster, Ca (2021)17 contaminants measured
- Landale Mutual Water Company — Lancaster, Ca (2022)18 contaminants measured· 1 at or above the limit
- Las Virgenes MWD — Calabasas, Ca (2023)18 contaminants measured
- Lemoore Naval Air Station — Lemoore, Ca (2023)9 contaminants measured· 1 at or above the limit
- Lemoore, City of — Lemoore, Ca (2023)10 contaminants measured
- Lerdo Sheriff S Facility — Bakersfield, Ca (2023)4 contaminants measured
- Liberty Park Water Association — Huntington Beach, Ca (2020)9 contaminants measured
- Liberty Park Water Association — Huntington Beach, Ca (2021)8 contaminants measured· 1 at or above the limit
- Liberty Park Water Association — Huntington Beach, Ca (2022)22 contaminants measured
- Liberty Park Water Association — Huntington Beach, Ca (2023)20 contaminants measured
- Liberty Utilities - Bellflower-norwalk — Downey, Ca (2023)21 contaminants measured· 1 at or above the limit
- Liberty Utilities - Compton — Downey, Ca (2023)18 contaminants measured
- Liberty Utilities - Lynwood — Downey, Ca (2023)14 contaminants measured· 1 at or above the limit
- Liberty Utilities - Mesa Crest — Downey, Ca (2020)11 contaminants measured
- Liberty Utilities - Mesa Crest — Downey, Ca (2023)12 contaminants measured
- Liberty Utilities - Mesa Crest — Downey, Ca (2021)13 contaminants measured
- Liberty Utilities - Mesa Crest — Downey, Ca (2022)13 contaminants measured
- Liberty Utilities (av Ranchos) Corp. — Downey, Ca (2023)13 contaminants measured
- Lily of the Valley Mobile Village — Saugus, Ca (2023)8 contaminants measured
- Lily of the Valley Mobile Village — Saugus, Ca (2021)8 contaminants measured
- Lily of the Valley Mobile Village — Saugus, Ca (2022)8 contaminants measured
- Limoneira Ranch #1 — Santa Paula, Ca (2022)14 contaminants measured
- Lincoln Avenue Water Co. — Altadena, Ca (2020)28 contaminants measured
- Lincoln Avenue Water Co. — Altadena, Ca (2022)23 contaminants measured· 1 at or above the limit
- Lincoln Avenue Water Co. — Altadena, Ca (2021)26 contaminants measured
- Linda County Water District — Marysville, Ca (2022)9 contaminants measured
- Lindsay, City of — Lindsay, Ca (2023)17 contaminants measured
- Little Baldy Water — Llano, Ca (2021)4 contaminants measured
- Little Baldy Water — Llano, Ca (2020)6 contaminants measured
- Little Bear Water Company — Soledad, Ca (2020)17 contaminants measured
- Littlerock Creek Irrigation Dist. — Littlerock, Ca (2020)4 contaminants measured
- Llano Del Rio Water Company — Llano, Ca (2022)18 contaminants measured· 1 at or above the limit
- Llano Del Rio Water Company — Llano, Ca (2023)16 contaminants measured
- Llano Del Rio Water Company — Llano, Ca (2020)10 contaminants measured
- Llano Del Rio Water Company — Llano, Ca (2021)18 contaminants measured· 1 at or above the limit
- Llano Mutual Water Company — Llano, Ca (2022)18 contaminants measured
- Llano Mutual Water Company — Llano, Ca (2023)17 contaminants measured
- Llano Mutual Water Company — Llano, Ca (2020)10 contaminants measured
- Llano Mutual Water Company — Llano, Ca (2021)18 contaminants measured· 1 at or above the limit
- Lockeford Community Serv. Dist. — Lockeford, Ca (2023)19 contaminants measured
- Lodi, City of — Lodi, Ca (2023)16 contaminants measured· 1 at or above the limit
- Loma Linda University — Loma Linda, Ca (2023)21 contaminants measured
- Loma Linda, City of — Loma Linda, Ca (2023)27 contaminants measured
- Lomita-city, Water Dept. — Lomita, Ca (2021)34 contaminants measured· 1 at or above the limit
- Lomita-city, Water Dept. — Lomita, Ca (2022)25 contaminants measured
- Lomita-city, Water Dept. — Lomita, Ca (2023)24 contaminants measured
- Lomita-city, Water Dept. — Lomita, Ca (2020)21 contaminants measured
- Lompoc-city Water Utility Div — Lompoc, Ca (2023)20 contaminants measured
- London Community Serv Dist — Dinuba, Ca (2023)11 contaminants measured
- Long Beach (2024)22 contaminants measured
- Long Beach Utilities Department — Long Beach, Ca (2023)25 contaminants measured
- Lopez Project — San Luis Obispo, Ca (2023)16 contaminants measured
- Los Alamos Community Services District — Los Alamos, Ca (2023)12 contaminants measured
- Los Angeles Cwwd 21-kagel Canyon — Alhambra, Ca (2023)10 contaminants measured
- Los Angeles Cwwd 21-kagel Canyon — Alhambra, Ca (2021)11 contaminants measured
- Los Angeles Cwwd 21-kagel Canyon — Alhambra, Ca (2022)9 contaminants measured
- Los Angeles Cwwd 21-kagel Canyon — Alhambra, Ca (2020)9 contaminants measured
- Los Angeles Cwwd 29 & 80-malibu — Alhambra, Ca (2023)9 contaminants measured
- Los Angeles Cwwd 29 & 80-malibu — Alhambra, Ca (2020)9 contaminants measured
- Los Angeles Cwwd 29 & 80-malibu — Alhambra, Ca (2022)11 contaminants measured
- Los Angeles Cwwd 29 & 80-malibu — Alhambra, Ca (2021)12 contaminants measured
- Los Angeles Cwwd 36-val Verde — Alhambra, Ca (2023)52 contaminants measured· 1 at or above the limit
- Los Angeles Cwwd 37-acton — Alhambra, Ca (2023)9 contaminants measured
- Los Angeles Cwwd 40 Reg 4 & 34 Lancaster — Alhambra, Ca (2023)14 contaminants measured
- Los Angeles Cwwd 40, R 24,27,33-pearblsm — Alhambra, Ca (2023)7 contaminants measured
- Los Angeles Cwwd 40, R 24,27,33-pearblsm — Alhambra, Ca (2020)9 contaminants measured
- Los Angeles Cwwd 40, R 24,27,33-pearblsm — Alhambra, Ca (2021)10 contaminants measured
- Los Angeles Cwwd 40, R 24,27,33-pearblsm — Alhambra, Ca (2022)10 contaminants measured
- Los Angeles Cwwd 40, Reg. 35-n.e. L.a. — Alhambra, Ca (2022)9 contaminants measured
- Los Angeles Cwwd 40, Reg. 35-n.e. L.a. — Alhambra, Ca (2021)7 contaminants measured
- Los Angeles Cwwd 40, Reg. 35-n.e. L.a. — Alhambra, Ca (2023)8 contaminants measured
- Los Angeles Cwwd 40, Reg. 35-n.e. L.a. — Alhambra, Ca (2020)10 contaminants measured
- Los Angeles Cwwd 40, Reg. 38-lake La — Alhambra, Ca (2023)8 contaminants measured
- Los Angeles LADWP (2023)34 contaminants measured
- Los Angeles Residential Community Founda — Santa Clarita, Ca (2023)9 contaminants measured
- Los Angeles Residential Community Founda — Santa Clarita, Ca (2021)1 contaminant measured· 1 at or above the limit
- Los Angeles Residential Community Founda — Santa Clarita, Ca (2020)2 contaminants measured· 1 at or above the limit
- Los Angeles Residential Community Founda — Santa Clarita, Ca (2022)1 contaminant measured· 1 at or above the limit
- Los Angeles-city, Dept. of Water & Power (2024)0 contaminants measured
- Los Angeles-city, Dept. of Water & Power (2025)0 contaminants measured
- Los Angeles-city, Dept. of Water & Power (2026)0 contaminants measured
- Los Osos Community Services District — Los Osos, Ca (2023)12 contaminants measured
- Lost Hills Utility District — Lost Hills, Ca (2023)6 contaminants measured
- Lukins Brothers Water Company — South Lake Tahoe, Ca (2022)28 contaminants measured· 1 at or above the limit
- Lynwood Park Mutual Water Co. — Compton, Ca (2021)16 contaminants measured
- Lynwood Park Mutual Water Co. — Compton, Ca (2020)16 contaminants measured
- Lynwood-city, Water Dept. — Lynwood, Ca (2023)26 contaminants measured
- Madera Co Md10a-madera Ranchos — Madera, Ca (2023)9 contaminants measured
- Madera Valley Water Company — Madera, Ca (2023)7 contaminants measured
- Malaga County Water District — Fresno, Ca (2021)11 contaminants measured· 2 at or above the limit
- Manhattan Beach-city, Water Dept. — Manhattan Beach, Ca (2021)15 contaminants measured
- Manhattan Beach-city, Water Dept. — Manhattan Beach, Ca (2023)14 contaminants measured
- Manhattan Beach-city, Water Dept. — Manhattan Beach, Ca (2020)13 contaminants measured· 1 at or above the limit
- Manteca, City of — Manteca, Ca (2023)18 contaminants measured
- Marin Municipal Water District — Corte Madera, Ca (2021)12 contaminants measured
- Marina Coast Water District — Marina, Ca (2023)31 contaminants measured
- Marygold Mwc — Bloomington, Ca (2023)18 contaminants measured
- Maywood Mutual Water Co. #1 — Huntington Park, Ca (2023)20 contaminants measured· 1 at or above the limit
- Maywood Mutual Water Co. #1 — Huntington Park, Ca (2021)15 contaminants measured
- Maywood Mutual Water Co. #1 — Huntington Park, Ca (2022)19 contaminants measured· 1 at or above the limit
- Maywood Mutual Water Co. #1 — Huntington Park, Ca (2020)16 contaminants measured
- Maywood Mutual Water Co. #2 — Maywood, Ca (2023)17 contaminants measured
- Maywood Mutual Water Co. #2 — Maywood, Ca (2020)17 contaminants measured
- Maywood Mutual Water Co. #2 — Maywood, Ca (2022)18 contaminants measured
- Maywood Mutual Water Co. #3 — Maywood, Ca (2022)17 contaminants measured
- Maywood Mutual Water Co. #3 — Maywood, Ca (2023)23 contaminants measured· 1 at or above the limit
- Maywood Mutual Water Co. #3 — Maywood, Ca (2021)18 contaminants measured
- Mcfarland, City of — Mcfarland, Ca (2023)5 contaminants measured· 2 at or above the limit
- Mckinleyville C.s.d. — Mckinleyville, Ca (2022)9 contaminants measured
- Meadow Vista Cwd — Meadow Vista, Ca (2024)8 contaminants measured· 1 at or above the limit
- Mendota, City of — Mendota, Ca (2023)43 contaminants measured· 4 at or above the limit
- Menlo Park Municipal Water — Menlo Park, Ca (2023)9 contaminants measured
- Mesa Water District — Costa Mesa, Ca (2023)37 contaminants measured
- Mesa Del Toro Mwc (2026)0 contaminants measured
- Mesa Del Toro Mwc (2025)0 contaminants measured
- Mesa Del Toro Mwc (2023)0 contaminants measured
- Mid-peninsula Water District — Belmont, Ca (2023)10 contaminants measured
- Mills Service Area (2024)30 contaminants measured· 3 at or above the limit
- Mission Hills Csd — Lompoc, Ca (2023)9 contaminants measured
- Mission Springs Wd — Desert Hot Springs, Ca (2022)22 contaminants measured
- Mitchell's Avenue E Mobile Home Park — Lancaster, Ca (2020)3 contaminants measured
- Modesto (2024)26 contaminants measured
- Modesto, City of — Modesto, Ca (2023)25 contaminants measured
- Mojave Pud — Mojave, Ca (2023)95 contaminants measured
- Monrovia-city, Water Dept. — Monrovia, Ca (2023)22 contaminants measured· 2 at or above the limit
- Monrovia-city, Water Dept. — Monrovia, Ca (2020)17 contaminants measured· 2 at or above the limit
- Monrovia-city, Water Dept. — Monrovia, Ca (2021)15 contaminants measured· 2 at or above the limit
- Monrovia-city, Water Dept. — Monrovia, Ca (2022)17 contaminants measured· 2 at or above the limit
- Montara Water and Sanitary District — Montara, Ca (2023)18 contaminants measured· 4 at or above the limit
- Monte Vista Wd — Montclair, Ca (2023)20 contaminants measured· 1 at or above the limit
- Montebello Land & Water Co. — Montebello, Ca (2023)30 contaminants measured· 2 at or above the limit
- Montebello Land & Water Co. — Montebello, Ca (2022)29 contaminants measured· 2 at or above the limit
- Montebello Land & Water Co. — Montebello, Ca (2020)28 contaminants measured· 2 at or above the limit
- Montecito Water Dist — Santa Barbara, Ca (2023)55 contaminants measured
- Monterey Park-city, Water Dept. — Monterey Park, Ca (2023)33 contaminants measured· 2 at or above the limit
- Moreno Valley (2024)30 contaminants measured· 3 at or above the limit
- Morro Bay Pw Dept - Water Division — Morro Bay, Ca (2023)25 contaminants measured· 1 at or above the limit
- Morro Rock Mutual Water Co — Cayucos, Ca (2022)8 contaminants measured
- Moulton Niguel Water District — Laguna Hills, Ca (2023)36 contaminants measured
- Mountain Gate C.s.d. — Redding, Ca (2022)8 contaminants measured
- Muscoy Mwc No. 1 — San Bernardino, Ca (2023)12 contaminants measured· 1 at or above the limit
- Myoma Dunes Mutual Water Company — Bermuda Dunes, Ca (2023)12 contaminants measured
- Nacimiento Water Company — Bradley, Ca (2023)11 contaminants measured· 2 at or above the limit
- Naf El Centro (2025)0 contaminants measured
- Naf El Centro (2023)0 contaminants measured
- Naf El Centro (2026)0 contaminants measured
- Nas North Island & Nab Coronado — San Diego, Ca (2021)17 contaminants measured
- Nasa Ames Research Center — Moffett Field, Ca (2023)9 contaminants measured
- Naval Base Ventura County, Point Mugu — Point Mugu, Ca (2023)34 contaminants measured
- Naval Base Ventura County, Port Hueneme — Point Mugu, Ca (2023)35 contaminants measured
- Nevada Id - E. George, Banner Mountain — Grass Valley, Ca (2023)15 contaminants measured
- Nevada Id - Lake of Pines — Grass Valley, Ca (2023)14 contaminants measured
- Nevada Id - Lake Wildwood — Grass Valley, Ca (2020)13 contaminants measured
- Nevada Id - Loma Rica — Grass Valley, Ca (2023)15 contaminants measured
- Nevada Id - North Auburn — Grass Valley, Ca (2021)12 contaminants measured
- Nipomo Comm Services Dist — Nipomo, Ca (2023)28 contaminants measured
- Norco, City of — Norco, Ca (2022)18 contaminants measured
- North Coast County Water Dist — Pacifica, Ca (2023)9 contaminants measured
- North Gualala Water Company — Gualala, Ca (2023)23 contaminants measured· 1 at or above the limit
- North Marin Water District — Novato, Ca (2023)16 contaminants measured
- North Tahoe Pud - Main — Tahoe Vista, Ca (2021)42 contaminants measured
- North Trails Mutual Water Company — Agua Dulce, Ca (2021)11 contaminants measured
- North Trails Mutual Water Company — Agua Dulce, Ca (2023)15 contaminants measured
- North Trails Mutual Water Company — Agua Dulce, Ca (2020)11 contaminants measured
- North Trails Mutual Water Company — Agua Dulce, Ca (2022)13 contaminants measured
- North Yuba Water District — Brownsville, Ca (2023)5 contaminants measured
- Norwalk - City, Water Dept. — Norwalk, Ca (2021)20 contaminants measured
- Norwalk - City, Water Dept. — Norwalk, Ca (2022)24 contaminants measured· 2 at or above the limit
- Nps-ash Mountain — Three Rivers, Ca (2023)11 contaminants measured· 1 at or above the limit
- Nps-grant Grove — Three Rivers, Ca (2023)10 contaminants measured
- Nps-wolverton — Three Rivers, Ca (2023)10 contaminants measured
- Nuevo Water Company — Nuevo, Ca (2022)29 contaminants measured· 1 at or above the limit
- O'connor Tract Co-operative Water Co. — Palo Alto, Ca (2023)9 contaminants measured
- Oak Grove Mobile Home Park — Bell Canyon, Ca (2020)3 contaminants measured· 1 at or above the limit
- Oak Grove Mobile Home Park — Bell Canyon, Ca (2023)5 contaminants measured
- Oak Grove Mobile Home Park — Bell Canyon, Ca (2021)1 contaminant measured· 1 at or above the limit
- Oak Grove Mobile Home Park — Bell Canyon, Ca (2022)1 contaminant measured· 1 at or above the limit
- Oakdale, City of — Oakdale, Ca (2023)9 contaminants measured
- Oceano Comm Services Dist. — Oceano, Ca (2021)20 contaminants measured
- Oceanside, City of — Oceanside, Ca (2023)13 contaminants measured· 1 at or above the limit
- Oildale Mwc — Bakersfield, Ca (2023)16 contaminants measured
- Ojai Water System — Oak View, Ca (2023)11 contaminants measured
- Olivehurst Public U.d. — Olivehurst, Ca (2022)2 contaminants measured
- Olivenhain MWD — Encinitas, Ca (2023)28 contaminants measured
- Ontario (2024)41 contaminants measured
- Ontario Municipal Utilities Company (2025)0 contaminants measured
- Ontario Municipal Utilities Company (2023)0 contaminants measured
- Ontario Municipal Utilities Company (2026)0 contaminants measured
- Orchard Dale Water District — Whittier, Ca (2023)15 contaminants measured
- Orchard Dale Water District — Whittier, Ca (2020)13 contaminants measured
- Orchard Dale Water District — Whittier, Ca (2021)21 contaminants measured· 2 at or above the limit
- Orchard Dale Water District — Whittier, Ca (2022)24 contaminants measured· 2 at or above the limit
- Orosi Public Utility District — Orosi, Ca (2023)13 contaminants measured
- Otay Water District — Spring Valley, Ca (2023)23 contaminants measured
- Oxnard (2024)29 contaminants measured
- Oxnard Water Dept (2025)0 contaminants measured
- Oxnard Water Dept (2023)0 contaminants measured
- Oxnard Water Dept (2026)0 contaminants measured
- Padre Dam MWD — Santee, Ca (2023)20 contaminants measured
- Page Avenue Mutual Water Company — Fullerton, Ca (2020)22 contaminants measured· 1 at or above the limit
- Page Avenue Mutual Water Company — Fullerton, Ca (2023)19 contaminants measured
- Palmdale Water Dist. — Palmdale, Ca (2023)15 contaminants measured
- Palo Alto Park Mutual Water Company — East Palo Alto, Ca (2023)11 contaminants measured
- Palomar Christian Conference Center — Palomar Mountain, Ca (2023)3 contaminants measured
- Paradise Irrigation District — Paradise, Ca (2023)24 contaminants measured
- Paradise Ranch Mhp — Beverly Hills, Ca (2021)8 contaminants measured
- Paradise Ranch Mhp — Beverly Hills, Ca (2023)32 contaminants measured· 2 at or above the limit
- Paradise Ranch Mhp — Beverly Hills, Ca (2020)8 contaminants measured
- Paradise Ranch Mhp — Beverly Hills, Ca (2022)8 contaminants measured
- Paramount - City, Water Dept. — Paramount, Ca (2023)17 contaminants measured
- Paramount - City, Water Dept. — Paramount, Ca (2020)14 contaminants measured· 1 at or above the limit
- Paramount - City, Water Dept. — Paramount, Ca (2021)17 contaminants measured· 1 at or above the limit
- Paramount - City, Water Dept. — Paramount, Ca (2022)16 contaminants measured
- Pasadena (2023)64 contaminants measured
- Pasadena Water and Power (2024)0 contaminants measured
- Pasadena Water and Power (2025)0 contaminants measured
- Pasadena Water and Power (2026)0 contaminants measured
- Petaluma, City of — Petaluma, Ca (2021)11 contaminants measured· 1 at or above the limit
- Peter Pitchess Honor Rancho Detn. Ctr — Castaic, Ca (2023)6 contaminants measured
- Peter Pitchess Honor Rancho Detn. Ctr — Castaic, Ca (2020)8 contaminants measured
- Peter Pitchess Honor Rancho Detn. Ctr — Castaic, Ca (2021)8 contaminants measured
- Peter Pitchess Honor Rancho Detn. Ctr — Castaic, Ca (2022)8 contaminants measured
- Phelan Pinon Hills Csd — Phelan, Ca (2023)16 contaminants measured· 1 at or above the limit
- Pico Rivera - City, Water Dept. — Pico Rivera, Ca (2023)27 contaminants measured· 2 at or above the limit
- Pico Rivera - City, Water Dept. — Pico Rivera, Ca (2020)12 contaminants measured
- Pico Rivera - City, Water Dept. — Pico Rivera, Ca (2021)15 contaminants measured
- Pico Rivera - City, Water Dept. — Pico Rivera, Ca (2022)25 contaminants measured· 2 at or above the limit
- Pico Wd — Pico Rivera, Ca (2023)18 contaminants measured· 2 at or above the limit
- Pico Wd — Pico Rivera, Ca (2020)19 contaminants measured· 2 at or above the limit
- Pico Wd — Pico Rivera, Ca (2021)20 contaminants measured· 2 at or above the limit
- Pico Wd — Pico Rivera, Ca (2022)19 contaminants measured· 2 at or above the limit
- Pine Valley Mutual Wc — Pine Valley, Ca (2023)11 contaminants measured· 2 at or above the limit
- Pinedale County Water District — Pinedale, Ca (2023)13 contaminants measured
- Pismo Beach Water Department — Pismo Beach, Ca (2023)27 contaminants measured· 3 at or above the limit
- Pixley Public Util Dist — Pixley, Ca (2023)12 contaminants measured· 2 at or above the limit
- Placer Cwa - Auburn/bowman — Auburn, Ca (2022)15 contaminants measured
- Placer Cwa - Colfax — Auburn, Ca (2022)16 contaminants measured
- Placer Cwa - Foothill — Auburn, Ca (2022)15 contaminants measured
- Placerville, City of - Main — Placerville, Ca (2023)6 contaminants measured
- Planada Csd — Planada, Ca (2023)7 contaminants measured
- Pleasant Valley Mutual Water Co — Camarillo, Ca (2023)4 contaminants measured
- Plumas Lake — Olivehurst, Ca (2022)2 contaminants measured
- Pomona (2024)68 contaminants measured· 3 at or above the limit
- Pomona - City, Water Dept. (2026)0 contaminants measured
- Pomona - City, Water Dept. (2023)0 contaminants measured
- Pomona - City, Water Dept. (2025)0 contaminants measured
- Poplar Comm Service Dist — Poplar, Ca (2023)11 contaminants measured
- Port Hueneme City Water Dept — Port Hueneme, Ca (2023)39 contaminants measured
- Porterville, City of — Porterville, Ca (2023)13 contaminants measured
- Poway, City of — Poway, Ca (2023)17 contaminants measured
- Psmcsd - Pajaro — Royal Oaks, Ca (2023)11 contaminants measured
- Purissima Hills Water District — Los Altos Hills, Ca (2022)10 contaminants measured
- Quartz Hill Water Dist. — Quartz Hill, Ca (2023)15 contaminants measured· 1 at or above the limit
- Quartz Hill Water Dist. — Quartz Hill, Ca (2020)13 contaminants measured· 1 at or above the limit
- Quartz Hill Water Dist. — Quartz Hill, Ca (2021)14 contaminants measured· 1 at or above the limit
- Quartz Hill Water Dist. — Quartz Hill, Ca (2022)12 contaminants measured· 2 at or above the limit
- Rainbow Municipal Wd — Fallbrook, Ca (2023)26 contaminants measured
- Ramona Municipal Wd — Ramona, Ca (2023)24 contaminants measured
- Rancho California Water District — Temecula, Ca (2023)22 contaminants measured
- Rancho Cucamonga (2024)16 contaminants measured
- Rancho Estates Mutual Water Co. (2023)0 contaminants measured
- Rancho Estates Mutual Water Co. (2025)0 contaminants measured
- Rancho Estates Mutual Water Co. (2026)0 contaminants measured
- Rancho Murieta Community Servi — Rancho Murieta, Ca (2023)17 contaminants measured
- Redlands City Mud-water Div — Redlands, Ca (2023)20 contaminants measured
- Reedley, City of — Reedley, Ca (2022)14 contaminants measured
- Reesedale Mutual — Lancaster, Ca (2020)11 contaminants measured
- Reesedale Mutual — Lancaster, Ca (2021)10 contaminants measured
- Rialto (2024)33 contaminants measured
- Rialto, City of (2023)0 contaminants measured
- Rialto, City of (2025)0 contaminants measured
- Rialto, City of (2026)0 contaminants measured
- Rincon Del Diablo MWD (id-1) (2026)0 contaminants measured
- Rincon Del Diablo MWD (id-1) (2023)0 contaminants measured
- Rincon Del Diablo MWD (id-1) (2025)0 contaminants measured
- Rincon Del Diablo MWD (id-a) — Escondido, Ca (2023)9 contaminants measured
- Rio Alto Water District — Cottonwood, Ca (2023)13 contaminants measured
- Rio Cosumnes Correctional Center [sws] — Sacramento, Ca (2023)7 contaminants measured· 1 at or above the limit
- Rio Dell, City of — Rio Dell, Ca (2023)6 contaminants measured
- Rio Linda/elverta Community Water Dist — Rio Linda, Ca (2023)12 contaminants measured
- Ripon, City of — Ripon, Ca (2023)10 contaminants measured
- Rivers End Trailer Park — Agoura Hills, Ca (2022)1 contaminant measured· 1 at or above the limit
- Rivers End Trailer Park — Agoura Hills, Ca (2023)10 contaminants measured· 1 at or above the limit
- Rivers End Trailer Park — Agoura Hills, Ca (2020)1 contaminant measured
- Rivers End Trailer Park — Agoura Hills, Ca (2021)1 contaminant measured· 1 at or above the limit
- Riverside (2024)16 contaminants measured
- Riverside Highland Water Company — Grand Terrace, Ca (2023)23 contaminants measured· 3 at or above the limit
- Riverside, City of (2023)0 contaminants measured
- Riverside, City of (2025)0 contaminants measured
- Riverside, City of (2026)0 contaminants measured
- Riverstone/rootcreek Water District — Fresno, Ca (2023)15 contaminants measured
- Rogina Water Company Inc. — Talmage, Ca (2023)11 contaminants measured
- Rohnert Park, City of — Rohnert Park, Ca (2023)15 contaminants measured· 1 at or above the limit
- Rosamond Csd — Rosamond, Ca (2023)18 contaminants measured
- Rowland Water District — Rowland Heights, Ca (2023)48 contaminants measured· 1 at or above the limit
- Rowland Water District — Rowland Heights, Ca (2020)23 contaminants measured
- Rowland Water District — Rowland Heights, Ca (2021)21 contaminants measured
- Rowland Water District — Rowland Heights, Ca (2022)21 contaminants measured· 1 at or above the limit
- Rubidoux Community Sd — Jurupa Valley, Ca (2023)18 contaminants measured
- Rubio Canon Land & Water Association — Altadena, Ca (2023)28 contaminants measured
- Rubio Canon Land & Water Association — Altadena, Ca (2020)28 contaminants measured
- Running Springs Water District — Running Springs, Ca (2023)26 contaminants measured
- Russian River County Water District — Forestville, Ca (2023)5 contaminants measured
- Sacramento Suburban Water District — Sacramento, Ca (2023)22 contaminants measured· 1 at or above the limit
- Salinas (2024)37 contaminants measured
- San Antonio Water Company — Upland, Ca (2023)16 contaminants measured
- San Bernardino City — San Bernardino, Ca (2023)16 contaminants measured· 2 at or above the limit
- San Bernardino Valley Wd — San Bernardino, Ca (2023)23 contaminants measured· 5 at or above the limit
- San Diego (2023)32 contaminants measured
- San Diego, City of (2026)0 contaminants measured
- San Diego, City of (2024)0 contaminants measured
- San Diego, City of (2025)0 contaminants measured
- San Dieguito Wd — Encinitas, Ca (2023)18 contaminants measured· 2 at or above the limit
- San Fernando-city, Water Dept. — San Fernando, Ca (2023)21 contaminants measured
- San Francisco SFPUC (2023)31 contaminants measured
- San Gabriel County Wd — Rosemead, Ca (2023)22 contaminants measured
- San Gabriel Valley Water Co-montebello 1 — El Monte, Ca (2023)35 contaminants measured
- San Gabriel Valley Water Co-montebello 2 — El Monte, Ca (2023)22 contaminants measured
- San Gabriel Valley Water Co.-el Monte — El Monte, Ca (2023)43 contaminants measured
- San Gabriel Valley Wc - Fontana (2023)0 contaminants measured
- San Gabriel Valley Wc - Fontana (2026)0 contaminants measured
- San Gabriel Valley Wc - Fontana (2025)0 contaminants measured
- San Jacinto, City of (2026)0 contaminants measured
- San Jacinto, City of (2025)0 contaminants measured
- San Jacinto, City of (2023)0 contaminants measured
- San Joaquin County - Lincoln Village — Stockton, Ca (2023)25 contaminants measured· 1 at or above the limit
- San Joaquin County-mokelumne Acres — Stockton, Ca (2023)13 contaminants measured· 1 at or above the limit
- San Joaquin, City of — San Joaquin, Ca (2023)8 contaminants measured
- San Jose (2024)22 contaminants measured
- San Jose Water — San Jose, Ca (2021)28 contaminants measured
- San Juan Bautista, City of — San Juan Bautista, Ca (2023)13 contaminants measured
- San Juan Water District — Granite Bay, Ca (2023)18 contaminants measured
- San Lorenzo Valley Water Dist — Boulder Creek, Ca (2023)13 contaminants measured
- San Luis Obispo Water Department — San Luis Obispo, Ca (2023)15 contaminants measured
- San Mateo (2024)30 contaminants measured
- San Miguel Community Services District — San Miguel, Ca (2023)15 contaminants measured· 3 at or above the limit
- San Miguelito Mwc — Avila Beach, Ca (2023)5 contaminants measured· 1 at or above the limit
- Santa Ana (2024)51 contaminants measured
- Santa Ana River Water Company — Jurupa Valley, Ca (2022)22 contaminants measured
- Santa Clarita (2024)47 contaminants measured· 2 at or above the limit
- Santa Cruz Water Department — Santa Cruz, Ca (2023)28 contaminants measured· 1 at or above the limit
- Santa Fe I.d. — Rancho Santa Fe, Ca (2023)43 contaminants measured· 2 at or above the limit
- Santa Fe Springs - City, Water Dept. — Santa Fe Springs, Ca (2021)26 contaminants measured· 2 at or above the limit
- Santa Fe Springs - City, Water Dept. — Santa Fe Springs, Ca (2023)26 contaminants measured· 2 at or above the limit
- Santa Fe Springs - City, Water Dept. — Santa Fe Springs, Ca (2020)26 contaminants measured· 2 at or above the limit
- Santa Fe Springs - City, Water Dept. — Santa Fe Springs, Ca (2022)27 contaminants measured· 2 at or above the limit
- Santa Margarita Water District — Rancho Santa Margarita, Ca (2023)32 contaminants measured
- Santa Margarita Water District-id9 — Rancho Santa Margarita, Ca (2023)35 contaminants measured
- Santa Monica-city, Water Division — Los Angeles, Ca (2023)18 contaminants measured
- Santa Nella County Water District — Santa Nella, Ca (2023)9 contaminants measured· 1 at or above the limit
- Santa Rosa (2024)30 contaminants measured
- Santa Rosa, City of (2025)0 contaminants measured
- Santa Rosa, City of (2026)0 contaminants measured
- Santa Rosa, City of (2023)0 contaminants measured
- Santa Ynez River Water Cons. Dist. Id#1 — Santa Ynez, Ca (2023)39 contaminants measured· 1 at or above the limit
- Saticoy Country Club-city of Ventura (2024)0 contaminants measured
- Saticoy Country Club-city of Ventura (2025)0 contaminants measured
- Saticoy Country Club-city of Ventura (2026)0 contaminants measured
- Sbdno County Service Area 64 — San Bernardino, Ca (2023)15 contaminants measured
- Sbdno County Service Area 70 Cedar Glen (2023)0 contaminants measured
- Sbdno County Service Area 70 Cedar Glen (2025)0 contaminants measured
- Sbdno County Service Area 70 Cedar Glen (2026)0 contaminants measured
- Sbdno County Service Area 70j — San Bernardino, Ca (2023)13 contaminants measured
- Scotts Valley Water District — Scotts Valley, Ca (2023)10 contaminants measured
- Scwa - Arden Park Vista — Sacramento, Ca (2023)21 contaminants measured
- Scwa - Laguna/vineyard — Sacramento, Ca (2023)24 contaminants measured
- Scwa Mather-sunrise — Sacramento, Ca (2023)10 contaminants measured
- Seaside Municipal Water System — Seaside, Ca (2023)13 contaminants measured
- Sebastopol, City of — Sebastopol, Ca (2022)13 contaminants measured
- Serrano Water District — Villa Park, Ca (2021)27 contaminants measured
- Serrano Water District — Villa Park, Ca (2022)31 contaminants measured
- Serrano Water District — Villa Park, Ca (2023)32 contaminants measured
- Serrano Water District — Villa Park, Ca (2020)33 contaminants measured
- SFPUC City Distribution Division (2024)0 contaminants measured
- SFPUC City Distribution Division (2025)0 contaminants measured
- SFPUC City Distribution Division (2026)0 contaminants measured
- Shafter, City of — Shafter, Ca (2022)19 contaminants measured
- Shasta C.s.d. — Shasta, Ca (2023)5 contaminants measured· 1 at or above the limit
- Sheep Creek Water Company — Phelan, Ca (2023)11 contaminants measured
- Sierra Madre-city, Water Dept. — Sierra Madre, Ca (2020)25 contaminants measured
- Sierra Madre-city, Water Dept. — Sierra Madre, Ca (2021)28 contaminants measured
- Sierra Madre-city, Water Dept. — Sierra Madre, Ca (2023)26 contaminants measured
- Sierra Madre-city, Water Dept. — Sierra Madre, Ca (2022)26 contaminants measured
- Signal Hill - City, Water Dept. — Signal Hill, Ca (2023)19 contaminants measured
- Signal Hill - City, Water Dept. — Signal Hill, Ca (2020)20 contaminants measured
- Signal Hill - City, Water Dept. — Signal Hill, Ca (2021)18 contaminants measured
- Signal Hill - City, Water Dept. — Signal Hill, Ca (2022)18 contaminants measured
- Simi Valley (2024)36 contaminants measured
- Sleepy Valley Water Company — Santa Clarita, Ca (2023)16 contaminants measured
- Sleepy Valley Water Company — Santa Clarita, Ca (2021)13 contaminants measured· 1 at or above the limit
- Sleepy Valley Water Company — Santa Clarita, Ca (2022)13 contaminants measured
- Sleepy Valley Water Company — Santa Clarita, Ca (2020)12 contaminants measured· 1 at or above the limit
- Slo Csa No. 16 - Shandon — San Luis Obispo, Ca (2023)11 contaminants measured
- Slo Cwwd No. 23 - Santa Margarita — San Luis Obispo, Ca (2023)16 contaminants measured
- Slocsa #10a - Cayucos — San Luis Obispo, Ca (2023)13 contaminants measured
- Slvwd - Felton Water System — Boulder Creek, Ca (2023)13 contaminants measured
- Smwd - Sj Ground Water Plant — Rancho Santa Margarita, Ca (2022)36 contaminants measured
- Smwd - Sj Ground Water Plant — Rancho Santa Margarita, Ca (2021)31 contaminants measured
- So. Cal. Edison Co.-santa Catalina — Avalon, Ca (2023)36 contaminants measured
- So. Cal. Edison Co.-santa Catalina — Avalon, Ca (2022)38 contaminants measured
- So. Cal. Edison Co.-santa Catalina — Avalon, Ca (2021)39 contaminants measured· 1 at or above the limit
- Soledad, City of — Soledad, Ca (2023)14 contaminants measured
- Solvang Water Division — Solvang, Ca (2023)43 contaminants measured· 1 at or above the limit
- Sonoma State University — Rohnert Park, Ca (2023)17 contaminants measured
- Sonoma, City of — Sonoma, Ca (2022)19 contaminants measured
- Soquel Creek Water District — Soquel, Ca (2023)9 contaminants measured
- South Coast Water District — Laguna Beach, Ca (2023)30 contaminants measured
- South Coast Water District — Laguna Beach, Ca (2021)31 contaminants measured
- South Coast Water District — Laguna Beach, Ca (2022)34 contaminants measured
- South Coast Water District — Laguna Beach, Ca (2020)30 contaminants measured
- South Feather W&p - Miners Ranch — Oroville, Ca (2023)4 contaminants measured
- South Gate-city, Water Dept. — South Gate, Ca (2023)26 contaminants measured· 2 at or above the limit
- South Midway City Mutual Water Co. — Huntington Beach, Ca (2020)15 contaminants measured
- South Montebello Irrigation Dist. — Montebello, Ca (2020)13 contaminants measured· 3 at or above the limit
- South Montebello Irrigation Dist. — Montebello, Ca (2023)22 contaminants measured· 2 at or above the limit
- South Montebello Irrigation Dist. — Montebello, Ca (2022)15 contaminants measured· 2 at or above the limit
- South Montebello Irrigation Dist. — Montebello, Ca (2021)13 contaminants measured· 2 at or above the limit
- South Tahoe Pud - Main — South Lake Tahoe, Ca (2023)73 contaminants measured· 1 at or above the limit
- Spv Water Company — Valencia, Ca (2022)9 contaminants measured
- Spv Water Company — Valencia, Ca (2021)12 contaminants measured
- Spv Water Company — Valencia, Ca (2023)15 contaminants measured
- Spv Water Company — Valencia, Ca (2020)8 contaminants measured
- Sswd - Del Paso Manor Service Area — Sacramento, Ca (2023)11 contaminants measured· 1 at or above the limit
- St. Helena, City of — St. Helena, Ca (2023)6 contaminants measured· 2 at or above the limit
- Stallion Springs Csd — Tehachapi, Ca (2023)18 contaminants measured
- Stanford University — Stanford, Ca (2023)12 contaminants measured
- Stockton (2024)24 contaminants measured
- Strathmore Public Util Dist — Strathmore, Ca (2023)18 contaminants measured
- Suburban Water Systems - Sativa — Covina, Ca (2023)35 contaminants measured· 1 at or above the limit
- Suburban Water Systems - Sativa — Covina, Ca (2020)14 contaminants measured
- Suburban Water Systems - Sativa — Covina, Ca (2021)30 contaminants measured
- Suburban Water Systems - Sativa — Covina, Ca (2022)28 contaminants measured
- Suburban Water Systems-covina Knolls — Covina, Ca (2023)27 contaminants measured
- Suburban Water Systems-glendora — Covina, Ca (2021)29 contaminants measured
- Suburban Water Systems-glendora — Covina, Ca (2020)26 contaminants measured
- Suburban Water Systems-glendora — Covina, Ca (2022)23 contaminants measured
- Suburban Water Systems-glendora — Covina, Ca (2023)26 contaminants measured
- Suburban Water Systems-la Mirada — Covina, Ca (2021)33 contaminants measured· 2 at or above the limit
- Suburban Water Systems-la Mirada — Covina, Ca (2022)43 contaminants measured· 2 at or above the limit
- Suburban Water Systems-la Mirada — Covina, Ca (2023)45 contaminants measured· 2 at or above the limit
- Suburban Water Systems-la Mirada — Covina, Ca (2020)33 contaminants measured· 2 at or above the limit
- Suburban Water Systems-san Jose — Covina, Ca (2023)33 contaminants measured
- Suburban Water Systems-whittier — Covina, Ca (2023)42 contaminants measured· 2 at or above the limit
- Suisun-solano Water Authority — Vacaville, Ca (2023)8 contaminants measured· 1 at or above the limit
- Sundale Mutual Water Company A, B — Lancaster, Ca (2020)7 contaminants measured
- Sunny Slope Water Co. — Pasadena, Ca (2020)28 contaminants measured
- Sunny Slope Water Co. — Pasadena, Ca (2021)27 contaminants measured
- Sunnyslope County Water Dist — Hollister, Ca (2022)29 contaminants measured
- Sunnyvale (2024)26 contaminants measured
- Sutter Community S.d. — Sutter, Ca (2023)5 contaminants measured· 1 at or above the limit
- Sweetwater Authority — Chula Vista, Ca (2023)37 contaminants measured· 6 at or above the limit
- Sweetwater Springs Cwd - Guerneville — Guerneville, Ca (2022)12 contaminants measured
- Sweetwater Springs Cwd - Monte Rio — Guerneville, Ca (2022)12 contaminants measured
- Syr4 — City of Santa Clara (2012) (2012)0 contaminants measured
- Syr4 — City of Santa Clara (2013) (2013)0 contaminants measured
- Syr4 — City of Santa Clara (2014) (2014)0 contaminants measured
- Syr4 — City of Santa Clara (2015) (2015)0 contaminants measured
- Syr4 — City of Santa Clara (2016) (2016)0 contaminants measured
- Syr4 — City of Santa Clara (2017) (2017)0 contaminants measured
- Syr4 — City of Santa Clara (2018) (2018)0 contaminants measured
- Syr4 — City of Santa Clara (2019) (2019)0 contaminants measured
- Tahoe City Pud - Main — Tahoe City, Ca (2023)21 contaminants measured
- Tahoe City Pud - Tahoe Swiss Village — Tahoe City, Ca (2021)6 contaminants measured
- Tehachapi, City of — Tehachapi, Ca (2022)15 contaminants measured
- Tejon Castac Wd - I5 & Laval Rd — Lebec, Ca (2023)18 contaminants measured
- Temescal Valley Water District — Temescal Valley, Ca (2023)49 contaminants measured
- Templeton Csd — Templeton, Ca (2023)25 contaminants measured· 2 at or above the limit
- Terra Bella Irrigation District - Tbt — Terra Bella, Ca (2023)11 contaminants measured
- Terrace Water Company — Colton, Ca (2023)41 contaminants measured· 2 at or above the limit
- Tesoro Viejo Master Mwc, Inc. — San Jose, Ca (2023)14 contaminants measured
- The River Community — Azusa, Ca (2023)6 contaminants measured
- The River Community — Azusa, Ca (2021)6 contaminants measured
- The River Community — Azusa, Ca (2020)7 contaminants measured
- The River Community — Azusa, Ca (2022)6 contaminants measured
- Thermalito Water & Sewer Dist — Oroville, Ca (2023)24 contaminants measured
- Thousand Oaks (2024)31 contaminants measured
- Three Valleys MWD — Claremont, Ca (2023)62 contaminants measured
- Thunderbird Cwd — Apple Valley, Ca (2023)27 contaminants measured
- Tipton Community Services Dist — Tipton, Ca (2022)12 contaminants measured· 1 at or above the limit
- Torrance (2024)23 contaminants measured
- Torrance-city, Water Dept. (2023)0 contaminants measured
- Torrance-city, Water Dept. (2026)0 contaminants measured
- Torrance-city, Water Dept. (2025)0 contaminants measured
- Town of Hillsborough — Hillsborough, Ca (2022)10 contaminants measured
- Town of Yountville — Yountville, Ca (2022)5 contaminants measured
- Trabuco Canyon Water District — Trabuco Canyon, Ca (2022)37 contaminants measured
- Trabuco Canyon Water District — Trabuco Canyon, Ca (2021)29 contaminants measured
- Trabuco Canyon Water District — Trabuco Canyon, Ca (2023)36 contaminants measured
- Trabuco Canyon Water District — Trabuco Canyon, Ca (2020)30 contaminants measured
- Tract 180 Mutual Water Co. — Cudahy, Ca (2023)19 contaminants measured· 1 at or above the limit
- Tract 180 Mutual Water Co. — Cudahy, Ca (2020)15 contaminants measured
- Tract 180 Mutual Water Co. — Cudahy, Ca (2021)18 contaminants measured
- Tract 180 Mutual Water Co. — Cudahy, Ca (2022)17 contaminants measured
- Tract 349 Mutual Water Co. — Cudahy, Ca (2023)19 contaminants measured· 2 at or above the limit
- Tract 349 Mutual Water Co. — Cudahy, Ca (2021)14 contaminants measured
- Tract 349 Mutual Water Co. — Cudahy, Ca (2022)18 contaminants measured
- Tract 349 Mutual Water Co. — Cudahy, Ca (2020)14 contaminants measured
- Tracy (2024)52 contaminants measured
- Tracy, City of (2023)0 contaminants measured
- Tracy, City of (2025)0 contaminants measured
- Tracy, City of (2026)0 contaminants measured
- Triunfo Water & Sanitation District — Westlake Village, Ca (2023)26 contaminants measured
- Tulare, City of — Tulare, Ca (2023)20 contaminants measured· 1 at or above the limit
- Turlock, City of — Turlock, Ca (2023)19 contaminants measured
- Twentynine Palms Water District — Twentynine Palms, Ca (2023)11 contaminants measured
- Uc - Davis — Davis, Ca (2023)17 contaminants measured
- Ucmr5 — City of Santa Clara (2025) (2025)0 contaminants measured
- Ukiah, City of — Ukiah, Ca (2021)19 contaminants measured
- Upland, City of — Upland, Ca (2023)20 contaminants measured
- Us Army Fort Irwin — Fort Irwin, Ca (2023)25 contaminants measured
- Usmc - 29 Palms — Twentynine Palms, Ca (2023)25 contaminants measured· 1 at or above the limit
- Vacaville (2024)34 contaminants measured
- Valencia Heights Water Co. — West Covina, Ca (2022)30 contaminants measured· 2 at or above the limit
- Valencia Heights Water Co. — West Covina, Ca (2021)28 contaminants measured· 1 at or above the limit
- Valencia Heights Water Co. — West Covina, Ca (2020)26 contaminants measured
- Valhalla Water Association — Tujunga, Ca (2023)3 contaminants measured
- Valhalla Water Association — Tujunga, Ca (2020)4 contaminants measured· 1 at or above the limit
- Valhalla Water Association — Tujunga, Ca (2022)4 contaminants measured· 1 at or above the limit
- Vallecitos Wd — San Marcos, Ca (2023)24 contaminants measured· 1 at or above the limit
- Vallejo (2024)21 contaminants measured
- Valley Center MWD — Valley Center, Ca (2023)13 contaminants measured
- Valley County Water Dist. — Baldwin Park, Ca (2023)21 contaminants measured
- Valley Estates Poa, Inc. (2023)0 contaminants measured
- Valley Estates Poa, Inc. (2025)0 contaminants measured
- Valley of Enchantment Mwc — Crestline, Ca (2023)9 contaminants measured· 2 at or above the limit
- Valley of the Moon Water District — El Verano, Ca (2023)18 contaminants measured· 1 at or above the limit
- Valley State Prison — Chowchilla, Ca (2023)11 contaminants measured· 1 at or above the limit
- Valley View Mutual Water Co. — Baldwin Park, Ca (2021)20 contaminants measured
- Valley View Mutual Water Co. — Baldwin Park, Ca (2023)20 contaminants measured
- Valley View Mutual Water Co. — Baldwin Park, Ca (2022)18 contaminants measured
- Valley View Mutual Water Co. — Baldwin Park, Ca (2020)18 contaminants measured
- Valley Water Co. — La Canada Flintridge, Ca (2022)28 contaminants measured
- Valley Water Co. — La Canada Flintridge, Ca (2020)29 contaminants measured
- Valley Water Co. — La Canada Flintridge, Ca (2021)30 contaminants measured
- Vandenberg Village Comm. Serv. Dist. — Lompoc, Ca (2023)9 contaminants measured
- Vaughn Wc Inc — Bakersfield, Ca (2023)22 contaminants measured
- Ventura (2023)32 contaminants measured
- Ventura Cwwd No. 1 - Moorpark — Moorpark, Ca (2023)47 contaminants measured
- Ventura Cwwd No. 17 - Bell Canyon — Moorpark, Ca (2023)18 contaminants measured
- Ventura Cwwd No. 19 - Somis — Moorpark, Ca (2023)19 contaminants measured
- Ventura Cwwd No. 38 - Lake Sherwood — Moorpark, Ca (2023)18 contaminants measured
- Ventura River Water District — Ojai, Ca (2023)21 contaminants measured
- Ventura Water Department — Ventura, Ca (2023)15 contaminants measured
- Ventura Wwd No. 8 - Simi Valley (2025)0 contaminants measured
- Ventura Wwd No. 8 - Simi Valley (2023)0 contaminants measured
- Ventura Wwd No. 8 - Simi Valley (2026)0 contaminants measured
- Vernon-city, Water Dept. — Vernon, Ca (2023)20 contaminants measured
- Vernon-city, Water Dept. — Vernon, Ca (2020)24 contaminants measured
- Vernon-city, Water Dept. — Vernon, Ca (2021)11 contaminants measured
- Vernon-city, Water Dept. — Vernon, Ca (2022)20 contaminants measured
- Victorville (2024)28 contaminants measured
- Victorville Water District (2023)0 contaminants measured
- Victorville Water District (2025)0 contaminants measured
- Victorville Water District (2026)0 contaminants measured
- Vineyard Ave Estates Mwc — Oxnard, Ca (2022)39 contaminants measured
- Vineyard Avenue Acres Mwc — Oxnard, Ca (2021)17 contaminants measured
- Visalia (2024)32 contaminants measured
- Vista Irrigation District — Vista, Ca (2023)23 contaminants measured
- Walnut Park Mutual Water Co. — Huntington Park, Ca (2023)15 contaminants measured
- Walnut Park Mutual Water Co. — Huntington Park, Ca (2020)12 contaminants measured
- Walnut Park Mutual Water Co. — Huntington Park, Ca (2021)13 contaminants measured
- Walnut Valley Water District — Walnut, Ca (2021)26 contaminants measured
- Wasco, City of — Wasco, Ca (2023)10 contaminants measured· 2 at or above the limit
- Watsonville, City of — Watsonville, Ca (2023)14 contaminants measured
- West Covina (2024)37 contaminants measured· 1 at or above the limit
- West Kern Water District — Taft, Ca (2023)13 contaminants measured
- West Valley Water District — Rialto, Ca (2023)37 contaminants measured· 5 at or above the limit
- Westborough Water District — South San Francisco, Ca (2023)10 contaminants measured
- Western Heights Water Company — Yucaipa, Ca (2023)9 contaminants measured
- Western Hills Water District/diablo Gran — Patterson, Ca (2023)8 contaminants measured· 1 at or above the limit
- Western MWD - Murrieta Division (2025)0 contaminants measured
- Western MWD - Murrieta Division (2026)0 contaminants measured
- Western MWD - Murrieta Division (2023)0 contaminants measured
- Western MWD — Riverside, Ca (2023)52 contaminants measured· 2 at or above the limit
- Western Skies Mobile Home Park — Lancaster, Ca (2020)10 contaminants measured
- Western Skies Mobile Home Park — Lancaster, Ca (2021)8 contaminants measured
- Westmorland, City of — Westmorland, Ca (2022)15 contaminants measured· 1 at or above the limit
- Westside Park Mutual Water — Palmdale, Ca (2023)78 contaminants measured
- Westside Park Mutual Water — Palmdale, Ca (2022)10 contaminants measured
- Westside Park Mutual Water — Palmdale, Ca (2021)5 contaminants measured
- White Fence Farms Mwc No. 1 — Palmdale, Ca (2021)78 contaminants measured· 2 at or above the limit
- White Fence Farms Mwc No. 1 — Palmdale, Ca (2023)77 contaminants measured· 1 at or above the limit
- White Fence Farms Mwc No. 1 — Palmdale, Ca (2020)79 contaminants measured
- White Fence Farms Mwc No.3 — Lancaster, Ca (2023)75 contaminants measured
- White Fence Farms Mwc No.3 — Lancaster, Ca (2020)78 contaminants measured
- White Fence Farms Mwc No.3 — Lancaster, Ca (2021)64 contaminants measured· 3 at or above the limit
- White Fence Farms Mwc No.3 — Lancaster, Ca (2022)76 contaminants measured
- Whittier-city, Water Dept. — Whittier, Ca (2023)29 contaminants measured· 2 at or above the limit
- Whittier-city, Water Dept. — Whittier, Ca (2022)31 contaminants measured· 3 at or above the limit
- Whittier-city, Water Dept. — Whittier, Ca (2020)32 contaminants measured· 3 at or above the limit
- Whittier-city, Water Dept. — Whittier, Ca (2021)33 contaminants measured· 3 at or above the limit
- Willow County Water District — Ukiah, Ca (2021)11 contaminants measured· 1 at or above the limit
- Wilsona Gardens Mutual — Lancaster, Ca (2023)8 contaminants measured
- Windsor, Town of — Windsor, Ca (2023)12 contaminants measured
- Winterhaven Mobile Estates — Lake Hughes, Ca (2023)9 contaminants measured
- Winton Water & Sanitary Dist — Winton, Ca (2023)18 contaminants measured· 6 at or above the limit
- Woodlake, City of — Woodlake, Ca (2023)15 contaminants measured
- Woodlands Development — Arroyo Grande, Ca (2023)15 contaminants measured
- Yorba Linda Water District — Placentia, Ca (2022)50 contaminants measured
- Yosemite Spring Park Util Co — Coarsegold, Ca (2023)42 contaminants measured· 1 at or above the limit
- Yucaipa Valley Water District — Yucaipa, Ca (2023)24 contaminants measured
Colorado9 systems
- Arvada (2024)20 contaminants measured
- Aurora (2024)18 contaminants measured
- Centennial (2023)31 contaminants measured· 2 at or above the limit
- Colorado Springs (2024)17 contaminants measured
- Denver (2023)15 contaminants measured
- Lakewood (2024)30 contaminants measured
- Pueblo (2023)14 contaminants measured· 1 at or above the limit
- Thornton (2024)17 contaminants measured
- Westminster (2024)7 contaminants measured
Connecticut3 systems
Florida26 systems
- Boca Raton (2024)15 contaminants measured· 1 at or above the limit
- Cape Coral (2024)11 contaminants measured
- City of Hialeah (2023)27 contaminants measured· 5 at or above the limit
- City of Lighthouse Point (2024)10 contaminants measured· 1 at or above the limit
- City of North Miami Beach (2023)27 contaminants measured· 5 at or above the limit
- Coral Springs (2024)11 contaminants measured· 1 at or above the limit
- Fort Lauderdale (2024)13 contaminants measured
- Fort Myers (2024)8 contaminants measured
- Gainesville (2024)7 contaminants measured
- Hialeah (2023)25 contaminants measured· 6 at or above the limit
- Hollywood (2024)16 contaminants measured· 1 at or above the limit
- Jacksonville (2024)20 contaminants measured· 1 at or above the limit
- Lakeland (2024)13 contaminants measured
- Miami Dade (2023)26 contaminants measured· 5 at or above the limit
- Miramar (2024)13 contaminants measured
- Orlando (2024)13 contaminants measured
- Palm Bay (2024)20 contaminants measured· 3 at or above the limit
- Palm Coast (2024)8 contaminants measured· 1 at or above the limit
- Pembroke Pines (2024)12 contaminants measured· 1 at or above the limit
- Pompano Beach (2024)10 contaminants measured· 1 at or above the limit
- Port St Lucie (2024)14 contaminants measured· 1 at or above the limit
- St Petersburg (2024)19 contaminants measured· 4 at or above the limit
- Tallahassee (2024)21 contaminants measured
- Tampa (2024)18 contaminants measured· 1 at or above the limit
- Town of Lauderdale-by-the-sea (2024)10 contaminants measured· 1 at or above the limit
- West Palm Beach (2024)15 contaminants measured· 3 at or above the limit
Georgia11 systems
- Athens (2024)7 contaminants measured· 1 at or above the limit
- Atlanta (2024)13 contaminants measured· 1 at or above the limit
- Augusta (2024)28 contaminants measured· 2 at or above the limit
- City of Alpharetta (2024)5 contaminants measured
- City of Milton (2024)4 contaminants measured
- City of Roswell (2024)5 contaminants measured
- Columbus (2024)16 contaminants measured· 2 at or above the limit
- Johns Creek (2024)5 contaminants measured
- Macon (2023)10 contaminants measured· 1 at or above the limit
- Sandy Springs (2024)5 contaminants measured
- Savannah (2024)8 contaminants measured
Hawaii1 system
Idaho2 systems
Illinois5 systems
Indiana10 systems
- Evansville (2024)14 contaminants measured
- Fishers (2024)42 contaminants measured
- Indianapolis (2023)21 contaminants measured
- Indianapolis (2023)21 contaminants measured
- Indianapolis (2024)33 contaminants measured
- Morgan County (2024)33 contaminants measured
- Morgan County (2023)21 contaminants measured
- South Bend (2024)25 contaminants measured
- Westfield (2024)32 contaminants measured
- Westfield (2023)21 contaminants measured
Iowa5 systems
- Cedar Rapids (2024)16 contaminants measured· 1 at or above the limit
- City of Robins (2024)17 contaminants measured· 1 at or above the limit
- Des Moines (2024)18 contaminants measured· 1 at or above the limit
- Glenbrook Cove Subdivision of Marion (2024)16 contaminants measured· 1 at or above the limit
- Poweshiek Water Association (2024)17 contaminants measured· 1 at or above the limit
Kansas5 systems
Kentucky2 systems
Louisiana4 systems
Maryland75 systems
- Amelano Manor (2024)8 contaminants measured· 1 at or above the limit
- Aqualand Campground (2024)3 contaminants measured
- Autumn Lake Healthcare (2024)4 contaminants measured
- Avon Crest (2024)8 contaminants measured
- B L Mhp (2024)6 contaminants measured
- Backbone Mountain Boys Camp (2024)13 contaminants measured· 5 at or above the limit
- Baltimore (2023)3 contaminants measured· 1 at or above the limit
- Banks O Dee (2024)6 contaminants measured
- Barrelville (2024)3 contaminants measured
- Bay Country Mhp (2024)7 contaminants measured
- Bayside Village (2024)2 contaminants measured
- Bayview at Kent Narrows (2024)7 contaminants measured
- Bb Apartments (2024)2 contaminants measured
- Beach Harbor (2024)8 contaminants measured
- Beaches Water (2024)14 contaminants measured· 1 at or above the limit
- Beantown Woodley (2024)11 contaminants measured
- Beaver Run Mhp (2024)10 contaminants measured· 1 at or above the limit
- Benedictine School (2024)11 contaminants measured
- Benjamin Homestead (2024)7 contaminants measured
- Bennett Mhp (2024)7 contaminants measured
- Betterton (2024)12 contaminants measured
- Birch Manor (2024)10 contaminants measured
- Boh Nak Mhp (2024)10 contaminants measured· 2 at or above the limit
- Bonnie Brooke (2024)12 contaminants measured
- Boones Mobile Estates (2024)6 contaminants measured
- Boonsboro Keedysville (2024)37 contaminants measured· 2 at or above the limit
- Bradford Estates (2024)18 contaminants measured· 1 at or above the limit
- Breton Bay (2024)7 contaminants measured
- Broad Creek (2024)15 contaminants measured· 1 at or above the limit
- Brook Lane (2024)12 contaminants measured
- Brophytown Distribution System (2024)8 contaminants measured· 1 at or above the limit
- Brunswick (2024)8 contaminants measured· 2 at or above the limit
- Calvert Manor (2024)26 contaminants measured
- Calverton School (2024)7 contaminants measured
- Campus Hills (2024)14 contaminants measured· 5 at or above the limit
- Caroline Acres Mhp (2024)6 contaminants measured
- Carpenters Point (2024)16 contaminants measured
- Cedar Cove (2024)9 contaminants measured
- Cedar Mhp (2024)6 contaminants measured
- Cedar Ridge (2024)9 contaminants measured
- Cedarhurst Mhp (2024)4 contaminants measured· 1 at or above the limit
- Cedarville Mhp (2024)8 contaminants measured
- Chapel Hill Water System (2024)6 contaminants measured· 1 at or above the limit
- Charlotte Hall (2024)10 contaminants measured
- Cheltenham Youth Facility (2024)10 contaminants measured· 6 at or above the limit
- Chesapeake Beach (2024)11 contaminants measured
- Chestertown (2024)15 contaminants measured
- City of Annapolis (2024)7 contaminants measured
- City of Baltimore (2024)16 contaminants measured· 1 at or above the limit
- City of Cambridge (2024)15 contaminants measured
- City of Crisfield (2024)6 contaminants measured
- City of Cumberland (2024)11 contaminants measured
- Claiborne (2024)7 contaminants measured· 1 at or above the limit
- Crofton Odenton (2024)15 contaminants measured· 1 at or above the limit
- Eastern Correctional Institute (2024)14 contaminants measured· 5 at or above the limit
- Eastern Region Allegany Distrib System (2024)11 contaminants measured
- Easton Utilities (2024)8 contaminants measured
- Eden Mobile Home Park (2024)9 contaminants measured· 1 at or above the limit
- Ewell Waterworks Cooperative (2024)5 contaminants measured
- Fosters Mhp (2024)5 contaminants measured
- Fox Run Condominiums (2024)7 contaminants measured
- Freedom District (2024)19 contaminants measured· 2 at or above the limit
- Gaither Manor Apartments (2024)9 contaminants measured
- Glen Meadow Retirement Community (2024)19 contaminants measured
- Gramercy (2024)3 contaminants measured· 1 at or above the limit
- Granite Mhp (2024)8 contaminants measured
- Keswick Multi Care Center (2024)2 contaminants measured· 1 at or above the limit
- Lutheran Village at Miller_s Grant (2024)4 contaminants measured
- Metropolitan of Baltimore (2024)3 contaminants measured· 1 at or above the limit
- Neighborhoods at St Elizabeth (2024)4 contaminants measured
- Poolesville (2024)22 contaminants measured· 2 at or above the limit
- Rockville (2024)18 contaminants measured
- Town of Accident (2024)15 contaminants measured· 5 at or above the limit
- Town of Berlin (2024)5 contaminants measured
- Town of Denton (2024)10 contaminants measured
Massachusetts12 systems
- 53 Communities in the MWRA Service Area (2024)9 contaminants measured
- Boston (2024)8 contaminants measured
- Brockton (2024)12 contaminants measured
- Cambridge (2024)25 contaminants measured
- Lowell (2025)13 contaminants measured
- Lynn (2024)23 contaminants measured· 1 at or above the limit
- Malden (2024)8 contaminants measured
- Marlborough (2024)8 contaminants measured
- New Bedford (2024)25 contaminants measured
- Quincy (2024)9 contaminants measured
- Springfield (2024)11 contaminants measured· 1 at or above the limit
- Worcester (2024)11 contaminants measured
Michigan6 systems
Minnesota3 systems
Mississippi1 system
Missouri5 systems
Montana1 system
Nebraska2 systems
Nevada3 systems
New Hampshire1 system
New Jersey5 systems
- Edison (2024)32 contaminants measured· 2 at or above the limit
- Elizabeth (2024)19 contaminants measured· 2 at or above the limit
- Jersey City (2024)21 contaminants measured· 2 at or above the limit
- Lakewood (2025)32 contaminants measured· 1 at or above the limit
- Newark (2024)14 contaminants measured· 1 at or above the limit
New Mexico2 systems
New York5 systems
North Carolina15 systems
- Cary (2025)18 contaminants measured
- Charlotte (2024)20 contaminants measured
- Durham (2024)7 contaminants measured
- Fayetteville (2024)13 contaminants measured· 2 at or above the limit
- Greensboro (2024)18 contaminants measured· 1 at or above the limit
- High Point (2024)84 contaminants measured· 3 at or above the limit
- Raleigh (2024)16 contaminants measured· 1 at or above the limit
- Town of Garner (2024)16 contaminants measured· 1 at or above the limit
- Town of Knightdale (2024)16 contaminants measured· 1 at or above the limit
- Town of Rolesville (2024)16 contaminants measured· 1 at or above the limit
- Town of Wake Forest (2024)16 contaminants measured· 1 at or above the limit
- Town of Wendell (2024)16 contaminants measured· 1 at or above the limit
- Town of Zebulon (2024)16 contaminants measured· 1 at or above the limit
- Wilmington (2024)36 contaminants measured
- Winston Salem (2024)16 contaminants measured
North Dakota1 system
Ohio6 systems
- Akron (2024)26 contaminants measured· 1 at or above the limit
- Cincinnati (2024)27 contaminants measured
- Cleveland (2024)62 contaminants measured
- Columbus (2025)69 contaminants measured· 3 at or above the limit
- Dayton (2024)18 contaminants measured· 2 at or above the limit
- Toledo (2024)11 contaminants measured· 1 at or above the limit
Oklahoma5 systems
Oregon4 systems
Pennsylvania3 systems
Rhode Island1 system
South Carolina3 systems
South Dakota1 system
Tennessee12 systems
- Catoosa Utility District Authority (2025)23 contaminants measured· 2 at or above the limit
- Chattanooga (2025)23 contaminants measured· 2 at or above the limit
- Clarksville (2024)17 contaminants measured· 1 at or above the limit
- East Ridge (2025)23 contaminants measured· 2 at or above the limit
- Knoxville (2024)24 contaminants measured
- Lookout Mountain (2025)23 contaminants measured· 2 at or above the limit
- Memphis (2024)10 contaminants measured
- Nashville (2023)84 contaminants measured
- Red Bank (2025)23 contaminants measured· 2 at or above the limit
- Rossville (2025)23 contaminants measured· 2 at or above the limit
- Signal Mountain (2025)23 contaminants measured· 2 at or above the limit
- Walker County (2025)23 contaminants measured· 2 at or above the limit
Texas35 systems
- Abilene (2024)33 contaminants measured· 4 at or above the limit
- Amarillo (2024)15 contaminants measured
- Arlington (2024)11 contaminants measured· 1 at or above the limit
- Austin (2024)16 contaminants measured
- Brownsville (2024)35 contaminants measured· 1 at or above the limit
- College Station (2024)17 contaminants measured
- Conroe (2024)5 contaminants measured
- Corpus Christi (2024)25 contaminants measured
- Dallas (2024)33 contaminants measured
- El Paso (2024)23 contaminants measured· 1 at or above the limit
- Fort Worth (2024)33 contaminants measured· 3 at or above the limit
- Frisco (2024)28 contaminants measured· 14 at or above the limit
- Garland (2024)77 contaminants measured
- Georgetown (2024)0 contaminants measured
- Grand Prairie (2024)35 contaminants measured· 3 at or above the limit
- Houston (2023)21 contaminants measured
- Laredo (2024)16 contaminants measured· 2 at or above the limit
- League City (2024)10 contaminants measured
- Lewisville (2024)26 contaminants measured
- Lubbock (2024)39 contaminants measured· 1 at or above the limit
- Mcallen (2024)14 contaminants measured
- Mckinney (2024)22 contaminants measured
- Mesquite (2024)33 contaminants measured
- Midland (2024)18 contaminants measured· 2 at or above the limit
- New Braunfels (2024)17 contaminants measured· 1 at or above the limit
- Odessa (2024)14 contaminants measured· 2 at or above the limit
- Pearland (2024)15 contaminants measured· 2 at or above the limit
- Plano (2024)55 contaminants measured
- Richardson (2024)38 contaminants measured· 1 at or above the limit
- Round Rock (2024)12 contaminants measured
- San Angelo (2024)17 contaminants measured· 1 at or above the limit
- San Antonio (2023)16 contaminants measured
- Sugar Land (2024)34 contaminants measured
- Waco (2024)11 contaminants measured· 1 at or above the limit
- Wichita Falls (2024)14 contaminants measured· 1 at or above the limit
Utah4 systems
Virginia13 systems
- Chesapeake (2023)40 contaminants measured· 1 at or above the limit
- City of Hampton (2024)42 contaminants measured· 1 at or above the limit
- City of Newport News (2025)41 contaminants measured· 1 at or above the limit
- City of Poquoson (2025)42 contaminants measured· 1 at or above the limit
- City of Poquoson (2024)42 contaminants measured· 1 at or above the limit
- Hampton (2025)42 contaminants measured· 1 at or above the limit
- James City County (2025)42 contaminants measured· 1 at or above the limit
- Newport News (2024)42 contaminants measured· 1 at or above the limit
- Norfolk (2023)14 contaminants measured
- Richmond (2024)20 contaminants measured· 1 at or above the limit
- Suffolk (2024)25 contaminants measured· 1 at or above the limit
- Virginia Beach (2024)9 contaminants measured
- York County (2024)42 contaminants measured· 1 at or above the limit
Washington7 systems
- Bellevue (2024)12 contaminants measured
- Kent (2024)25 contaminants measured· 2 at or above the limit
- Renton (2024)20 contaminants measured
- Seattle (2024)12 contaminants measured
- Spokane Valley (2024)10 contaminants measured
- Tacoma (2024)13 contaminants measured
- Vancouver (2024)21 contaminants measured· 2 at or above the limit
Washington, D.C.1 system
Wisconsin18 systems
- Brown Deer (2023)56 contaminants measured· 1 at or above the limit
- Butler (2023)56 contaminants measured· 1 at or above the limit
- Franklin (2023)56 contaminants measured· 1 at or above the limit
- Green Bay (2024)31 contaminants measured
- Greendale (2023)56 contaminants measured· 1 at or above the limit
- Greenfield (2023)56 contaminants measured· 1 at or above the limit
- Hales Corners (2023)56 contaminants measured· 1 at or above the limit
- Madison (2024)29 contaminants measured
- Menomonee Falls (2023)56 contaminants measured· 1 at or above the limit
- Mequon (2023)56 contaminants measured· 1 at or above the limit
- Milwaukee (2023)56 contaminants measured· 1 at or above the limit
- New Berlin (2023)56 contaminants measured· 1 at or above the limit
- Shorewood (2023)56 contaminants measured· 1 at or above the limit
- St. Francis (2023)56 contaminants measured· 1 at or above the limit
- Thiensville (2023)56 contaminants measured· 1 at or above the limit
- Waukesha (2023)56 contaminants measured· 1 at or above the limit
- Wauwatosa (2023)56 contaminants measured· 1 at or above the limit
- West Allis (2023)56 contaminants measured· 1 at or above the limit
New systems are added as each report clears verification. Every number traces back to the water utility's own published Consumer Confidence Report — a water-quality report covers an entire service area, not a single address.