California — all systems
California water systems A–Z
Page 9 of 11 · Riverdale Public Utility District → Sonora Estates Mobile Home Park. Every public water system we track in California, alphabetically. Each links to the system's measured contaminant levels against federal limits.
- Riverdale Public Utility District (2024)
- Riverdale Village (2025)
- Riverfront Mutual Water Company (2025)
- Rivergold Elementary School (2023)
- Riverkern Mutual Water Company (2023)
- Riverland Mobilehome Park (2024)
- Riverland Resort (2025)
- Rivernook Campground (2025)
- Rivers End Trailer Park (2025)
- Riverside Crossing Mhp (2024)
- Riverside Csa #122-mesa Verde (2022)
- Riverside Csd (2025)
- Riverside Highland Water Company (2025)
- Riverside Mobile Home Park (2025)
- Riverside, City of (2025)
- Riverstone/rootcreek Water District — Fresno, Ca (2023)
- Riverview Farms Ws (2025)
- Riverview Homeowners Association (2023)
- Riverview Mobile Home Estates (2023)
- Riverview Mobile Home Park (2024)
- Riverview School (2023)
- Riverview Water Association (2024)
- Roberts Ferry School Cafeteria (2024)
- Roberts Investments Water System (2025)
- Robin Way Water System (2024)
- Robinson's Corner Mhp (2021)
- Robley Property Mws (2025)
- Rockford School (2025)
- Rockwell Collins Inc. (fka Upco-utas) (2020)
- Rockwood Estates Mutual Water Company (2023)
- Rocky Comfort Mutual Water Co (2025)
- Rod Mclellan Botanicals Ws (2024)
- Rodeo (2024)
- Rodney Strong Vineyards (2023)
- Roederer Estate Winery (2024)
- Rogina Water Company Inc. (2024)
- Rohnert Park, City of (2025)
- Rolling Acres Mutual Water Company (2024)
- Rolling Green Utilities, Inc. (2024)
- Rolling Hills Mutual Water Company (2019)
- Rolling Hills Nut Company (2025)
- Rolling Hills Rancho Wa (2025)
- Rolling Oaks Road Association (2023)
- Rombauer Vineyards (2024)
- Roosevelt Elementary School (2024)
- Rosa Morada Mutual Water Company (2024)
- Rosamond Csd (2024)
- Rosamond School Water System (2023)
- Rosario Park (2024)
- Rose Garden (2025)
- Rosecrest Mutual (2025)
- Rosehart Industrial Park Ws (2025)
- Roseland Mobile Home Park (2025)
- Roseview Heights Mutual Water Company (2024)
- Rough & Ready Village (2024)
- Round Hill Winery (2025)
- Round Mountain Water Company (2025)
- Round Valley Elementary School (2025)
- Round Valley High School (2025)
- Round Valley School (2025)
- Rountree Facility(prev. Sheriff's Rehab) (2024)
- Rowland Water District (2024)
- Royal Carrizo Hoa (2021)
- Royal Oak Place Ws (2023)
- Royal Sierra Estates Ws (2025)
- Rs Utilities Water System (2024)
- Rubidoux Community Sd — Jurupa Valley, Ca (2023)
- Rubio Canon Land & Water Association (2025)
- Rubys Valley Care Home (2024)
- Running Springs Water District (2025)
- Rural North Vacaville Water District (2025)
- Rush Creek Lodge Water System (2023)
- Rush Creek Mutual Water System (2023)
- Russian River County Water District (2024)
- Russian River Mutual Water Co. (2023)
- Russos Mobile Park (2017)
- Rutherford Hill Mutual Water (2025)
- Rutherford Hill Winery (2025)
- Ryel Family Trust (2025)
- S & T Mutual Water Company (2024)
- S & W Warehousing, Llc (2025)
- S M S Briners Inc (2025)
- Sa 14 Chuk Chanse Subdivision (2025)
- Sable Offshore Corp Las Flores Canyon (2024)
- Sable Offshore Corp Popco (2024)
- Sac City Mobile Home Community Lp (2025)
- Sacramento International Airport [sws] (2024)
- Sacramento Rendering (2023)
- Sacramento River Rv Park (2024)
- Sacramento Suburban Water District (2025)
- Saddleback Mutual Water Co. (2017)
- Safari West (2024)
- Sahara Mobile Court (2023)
- Saint Andrews Abbey (2023)
- Saint Francis Winery-wild Oak Vineyards (2023)
- Saint Marie Mobile Home Park (2022)
- Sakata Seed Woodland Station (2023)
- Salinas Valley State Prison (2023)
- Salmon Creek Middle School (2024)
- Salyer Heights W.s., Inc (2020)
- Salyer Mutual Wc (formerly Riverview Ac) (2020)
- San Andreas Mutual Water Co (2024)
- San Antonio Canyon Msc (2025)
- San Antonio School District Ws (2025)
- San Antonio Water Company (2025)
- San Ardo Wd (2025)
- San Augustin Mutual Water Company (2023)
- San Benito High School (2024)
- San Bernardino City (2024)
- San Bernardino Valley Wd — San Bernardino, Ca (2023)
- San Cayetano Mutual Water Co (2024)
- San Diego (2023)
- San Dieguito Wd (2025)
- San Fernando-city, Water Dept. — San Fernando, Ca (2023)
- San Francisco International Airport (2025)
- San Francisco Regional Water System (2024)
- San Gabriel County Wd (2025)
- San Gabriel Valley Water Co-montebello 1 (2025)
- San Gabriel Valley Water Co-montebello 2 — El Monte, Ca (2023)
- San Gabriel Valley Water Co.-el Monte — El Monte, Ca (2023)
- San Jerardo Coop Ws (2024)
- San Joaquin County - Colonial Heights (2025)
- San Joaquin County - Lincoln Village (2025)
- San Joaquin County - Thornton (2024)
- San Joaquin County - Wilkinson Manor (2021)
- San Joaquin County-mokelumne Acres (2024)
- San Joaquin County-raymus Village (2024)
- San Joaquin Estates Mutual Water Company (2024)
- San Joaquin River Club Inc (2024)
- San Joaquin Valley National Cemetery (2025)
- San Joaquin Water Works #2 (2024)
- San Joaquin Wine Company (2024)
- San Joaquin, City of (2025)
- San Jose (2024)
- San Jose Water (2025)
- San Juan Bautista, City of (2025)
- San Juan Rd Ws #01 (2025)
- San Juan Vista (2024)
- San Juan Water District (2024)
- San Justo Mutual Water Company (2025)
- San Leandro (2024)
- San Lorenzo (2024)
- San Lorenzo Valley Water Dist — Boulder Creek, Ca (2023)
- San Lucas County Water District (2025)
- San Luis Hills (2025)
- San Luis Obispo Water Department (2025)
- San Marcos Mutual Water Company (2023)
- San Martin County Water District (2023)
- San Martin Foothills Water Company (2024)
- San Miguel Community Services District — San Miguel, Ca (2023)
- San Miguel Ws #01 (2024)
- San Miguel Ws #03 (2023)
- San Miguel Ws #22 (2024)
- San Miguelito Mwc (2024)
- San Pablo (2024)
- San Pasqual Academy (2025)
- San Pedro (2023)
- San Ramon (2024)
- San Simeon Csd (2025)
- San Vicente Mwc (2024)
- San Vicente Water Company (2025)
- San Ysidro (2023)
- San-i-pak Inc (2023)
- Sandmound Mutual (2025)
- Sandy Creek Village Mhp (2024)
- Sandy Point Mobile Home Park (2020)
- Santa Ana (2024)
- Santa Ana River Water Company (2024)
- Santa Anita Mutual Water Company (2023)
- Santa Clara Resources (2024)
- Santa Clara School (2023)
- Santa Clara Valley Medical Center (2024)
- Santa Clarita (2024)
- Santa Clarita Valley Water Agency (2025)
- Santa Cruz County Fairgrounds (2025)
- Santa Cruz Waldorf School (2024)
- Santa Cruz Water Department (2024)
- Santa Fe I.d. (2025)
- Santa Fe Springs - City, Water Dept. (2025)
- Santa Lucia Preserve Ws (2024)
- Santa Margarita Ranch Headquarters (2025)
- Santa Margarita Water District (2024)
- Santa Margarita Water District-id9 (2024)
- Santa Monica-city, Water Division (2025)
- Santa Nella County Water District (2024)
- Santa Rita Water (2025)
- Santa Rosa Golf & Country Club (2024)
- Santa Rosa Mobile Estates (2025)
- Santa Rosa, City of (2025)
- Santa Teresa Meadows Water Company (2025)
- Santa Ynez Rancho Estates (2023)
- Santa Ynez River Water Cons. Dist. Id#1 (2024)
- Santa Ynez Roblar Mobile Home Park (2021)
- Santa Ysabel Ranch Mwc (2024)
- Santos Ranch Pws #5-csa #35 (2024)
- Saputo Dairy Food Usa (2025)
- Saputo Dairy Foods Usa, Llc (2025)
- Saratoga (2025)
- Saratoga Heights Mutual Water Company (2024)
- Saticoy Country Club-city of Ventura (2025)
- Saucelito Elementary School (2024)
- Saviers Road Mutual Water Co (2025)
- Sbdno County Service Area 64 (2025)
- Sbdno County Service Area 70 Cedar Glen (2025)
- Sbdno County Service Area 70j (2025)
- Sce Bishop Creek Plant 4 (2025)
- Sce Bishop Creek Plant 5 (2024)
- Sce/big Creek Powerhouse 1 (2024)
- Scheid Vineyard Ws (2023)
- Schelby School (2025)
- Schramsberg Winery (2025)
- Schulte Road Warehouse 3, Llc Wtr Sys (2023)
- Schweikart Water System (2025)
- Sconza Candy Company (2025)
- Scotia Csd (2023)
- Scotts Valley Water District — Scotts Valley, Ca (2023)
- Scripps Ranch (2023)
- Scwa - Arden Park Vista (2025)
- Scwa - Laguna/vineyard (2025)
- Scwa Mather-sunrise (2024)
- Sea Ranch Water Company,the (puc) (2025)
- Seafair Road and Water Company (2024)
- Searles Valley Minerals Operations Inc (2024)
- Seaside Municipal Water System — Seaside, Ca (2023)
- Seawood Estates Mutual Water Company (2022)
- Sebastopol Charter School (2021)
- Sebastopol, City of (2024)
- Seeley Cwd (2024)
- Seghesio Farms (2025)
- Segura's Rv Park Llc (2025)
- Select Harvest Partners #1, Lp (2023)
- Select Harvest Usa, Llc (2025)
- Selma High School (2024)
- Sendero Ranch (2025)
- Seneca Family of Agencies (2023)
- Senior Canyon Mutual Water Co (2024)
- Senior Care Villa Water (2024)
- Sensient Natural Ingredients Llc (2023)
- Sequoia Bible Fellowship (2025)
- Sequoia Grove Vineyards (2024)
- Sequoia Union Elementary School (2024)
- Sequoia Water Assoc (2016)
- Sereno Del Mar Water Company (puc) (2025)
- Serra Mesa (2023)
- Serrano Water District — Villa Park, Ca (2023)
- Seville Water Company (2024)
- Seymour's Mutual Water System (2025)
- SFPUC City Distribution Division (2024)
- Shaded Terrace Pws (2024)
- Shadow Acres Mutual Water Company (2025)
- Shadow Mountain Mhp (2025)
- Shady Grove Mobile Home Park, Llc (2025)
- Shady Lake Water Association (2024)
- Shady Oaks Mobile Home Park Llc (2020)
- Shady Rest Trailer Court (2025)
- Shaffer Elementary School (2025)
- Shafter, City of (2024)
- Shamrock Mobile Home Park (2024)
- Sharondale Mesa Hoa (2024)
- Shasta C.s.d. (2024)
- Shasta Cascade Mobilehome Park (2025)
- Shasta Co Csa # 13 Alpine Meadows (2024)
- Shasta Co Csa # 8 Palo Cedro (2024)
- Shasta Csa - Castella, #3 (2024)
- Shasta Csa - Cragview, #23 (2024)
- Shasta Csa - French Gulch, #11 (2024)
- Shasta Csa - Jones Valley, #6 (2024)
- Shasta Csa - Sugarloaf, #2 (2023)
- Shasta Forest Village M.w.c. (2024)
- Shasta Horizon Mobile Home Park (2020)
- Shasta View Heights Owners Association (2023)
- Shasta-sustainable Resource Management (2024)
- Shastina Mobile Estates (2024)
- Shaver Lake Heights Mwc (2023)
- Shaver Lake Heights Water Assn (2024)
- Sheep Creek Water Company (2025)
- Sherman Oaks (2023)
- Sherwood Forest Mhp (2023)
- Sherwood Mobile Home Park (2025)
- Shiloh School District (2023)
- Shoei Foods (usa), Inc. (2023)
- Shorelands Road & Water Company (2024)
- Sid - Blue Ridge Oaks (2024)
- Sid - Elmira (2025)
- Sid - Gibson Canyon (2024)
- Sid - Peabody (2025)
- Sid - Pleasant Hills Ranch (2025)
- Sid - Quail Canyon (2024)
- Sierra Army Depot (2024)
- Sierra Bella Mutual Water Company (2025)
- Sierra Breeze Mutual Water Company (2023)
- Sierra Cascade Nursery (2024)
- Sierra Cedars Csd (2025)
- Sierra City Water Works, Inc. (2024)
- Sierra Co. W.w.d #1 Calpine (2024)
- Sierra Csa #5, Sierra Brooks (2024)
- Sierra East Hoa (2025)
- Sierra Enterprise Elementary School (2025)
- Sierra Estates Mutual Water Company (2024)
- Sierra Family Medical Clinic (2025)
- Sierra Gold Nurseries (2023)
- Sierra Grande Estates Mutual Water Co. (2024)
- Sierra High School (2025)
- Sierra Highland Csd (2024)
- Sierra King Homeowners Assn (2022)
- Sierra Lakes County Water Dist (2023)
- Sierra Linda Mutual Water Co (2025)
- Sierra Madre-city, Water Dept. — Sierra Madre, Ca (2023)
- Sierra Meadows (2025)
- Sierra Moon Mutual Water Company (2024)
- Sierra Mutual Water Company (2024)
- Sierra Nevada Brewing Co. (2024)
- Sierra North Community Service District (2025)
- Sierra Outdoor School (2025)
- Sierra Pacific Ind - Anderson (2024)
- Sierra Pacific Industries (2024)
- Sierra Pacific Industries - Red Bluff Mi (2024)
- Sierra Pacific Industries - Richfield (2024)
- Sierra Pacific Industries - Windows (2025)
- Sierra Pacific Industries Quincy (2023)
- Sierra Park Water Company Inc. (2024)
- Sierra Pines Mobile Home Park (2025)
- Sierra Tahoe Main Lodge (2023)
- Sierra Twain Harte Mhp (2024)
- Sierra View Jr Academy (2025)
- Sierra View School (2024)
- Sierra Village Mobile Home Park (2023)
- Sierra Village Mutual Water Co (2025)
- Sierra Vista Association (2024)
- Sierra Waldorf School (2025)
- Sierra Water Resources - Sierra City (2024)
- Sierraville P.u.d. (2025)
- Siesta Mobile Home Park (2023)
- Siete Robles Mutual Water Co (2023)
- Signal Hill - City, Water Dept. (2024)
- Silent Valley Club (2023)
- Silver Dollar Fairgrounds (2024)
- Silver Lake (2023)
- Silver Oak Wine Cellars (2025)
- Silver Oak Wine Cellars Llc (2024)
- Silverado Vineyards (2023)
- Silverado Water System (2019)
- Silverfork School (2025)
- Sisar Mutual Water Co (2025)
- Siskiyou Co. Rolling Hills Mwc (2023)
- Siskiyou Co.service Area #5/carrick (2023)
- Siskiyou Forest Products (2023)
- Siskiyou Lake Highlands Mwc (2022)
- Sisquoc (2023)
- Six Acres Water Company (2023)
- Sj County-redwood School (2023)
- Sjc Micke Grove Park (2023)
- Skp Park of the Sierras Inc (2023)
- Sky Acres Mutual Water Corp (2025)
- Sky Forest Mwc (2025)
- Sky View County Water (2024)
- Skylawn Memorial Park (skylawn Inc) (2023)
- Skyline Park (2023)
- Skywalker Ranch (2023)
- Sleepy Valley Water Company — Santa Clarita, Ca (2023)
- Slide Inn Snowbowl Water Co (2024)
- Slo Csa No. 10 - Cayucos Wtp (2020)
- Slo Csa No. 16 - Shandon — San Luis Obispo, Ca (2023)
- Slo Cwwd No. 23 - Santa Margarita — San Luis Obispo, Ca (2023)
- Slo Partners (2023)
- Slocsa #10a - Cayucos — San Luis Obispo, Ca (2023)
- Slvwd - Felton Water System — Boulder Creek, Ca (2023)
- Smiley Park Country Club (2025)
- Smith River C.s.d. (2025)
- Smwd - Sj Ground Water Plant — Rancho Santa Margarita, Ca (2022)
- Smwd-nichols Institute (2025)
- Snelling Merced Falls School (2023)
- Snow Summit (2025)
- Snowcrest Heights Imp Assoc (2024)
- Snowshoe Springs Assn. (2024)
- Snug Harbor Rv Lp (2023)
- So Trinity Unified School Dist. (2023)
- So. Cal. Edison Co.-santa Catalina — Avalon, Ca (2023)
- Sobre Vista Water Company (2024)
- Solano Verde Mutual Water Co (2024)
- Soledad Mountain Project Water System (2023)
- Soledad, City of — Soledad, Ca (2023)
- Solvang Water Division — Solvang, Ca (2023)
- SoMa (2024)
- Somerston Winery (2023)
- Son Shine Properties (2025)
- Sonoma County Csa 41-fitch Mountain (2025)
- Sonoma County Csa 41-freestone (2025)
- Sonoma County Csa 41-jenner (2025)
- Sonoma County Csa 41-salmon Creek (2025)
- Sonoma County Mutual Water Company (2023)
- Sonoma County Pub Works-central Landfill (2025)
- Sonoma Mountain County Water District (2025)
- Sonoma Ranch Mutual Water Company (2025)
- Sonoma State University (2024)
- Sonoma Warehousing (2024)
- Sonoma West Holdings Industrial Park (2025)
- Sonoma West Holdings North Plant (2024)
- Sonoma, City of (2023)
- Sonora Estates Mobile Home Park (2023)