Drinking water quality · 2023
· Verified
What's in Irvine Ranch Water District, CA tap water
143 contaminants were measured in the Irvine Ranch Water District, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 143
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
state-level CCR
Approaching the limit (≥ 80%)
Where your water comes from · EPA SDWIS
Irvine Ranch Water District, CA's drinking water comes from ground water, drawn from 26 sources.
Source
26ground water
- WELL · 22
- WELL OPA-1
- WELL C-8
- WELL C-9
- + 1 more
Treatment
29treatment plants
- OPA-1 PFAS TREATMENT PLANT
- DRWF BLENDING (DRWF TM)
- IDP/PTP DESALTER PLANT
- + 26 more
Distribution
37storage units
Also buys water from METROPOLITAN WATER DIST. OF SO. CAL., TRABUCO CANYON WATER DISTRICT, and 10 more.
Source: EPA SDWIS facilities inventory. Methodology.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 41.70666666666667 UG/LAverageSource water | 50 UG/LMCL | Approaching the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 5.750210526315789 UG/LAverageSource water | 10 UG/LMCL | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 5.751612903225807 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 68.66666666666667 UG/LAverageEntry point | 1000 UG/LMCL | Within the limit |
| IronA naturally occurring metal common in groundwater. | 15.486486486486486 UG/LAverageSource water | 300 UG/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 1.5241379310344827 UG/LAverageSource water | 100 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 7.83448275862069 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 2.2896551724137932 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 3.231034482758621 UG/LAverageSource water | 5000 UG/LMCL | Within the limit |
| Antimony | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 120 UG/LAverageEntry point | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 32.669230769230765 MG/LAverageEntry point | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 13.713799999999999 UG/LAverageEntry point | None set | Detected — no federal limit |
| GermaniumA trace metalloid found in some source water. | 0.82 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 64.2 mg/LHighest single sampleEntry point | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 19.239473684210527 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2.415 MG/LAverageSource water | None set | Detected — no federal limit |
| SilicaA naturally occurring compound from sand and rock. | 17.566666666666666 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 82.48421052631579 MG/LAverageSource water | None set | Detected — no federal limit |
| Vanadium | 6.820689655172414 UG/LAverageSource water | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.5 mg/LAverageLocal Treated Surface Water | 4 mg/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 585.3623188405797 MG/LAverageSource water | 1000 MG/LMCL | Within the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 790.9782608695652 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| OdorA measure of detectable smell in the water. | 0.9196428571428571 TONAverageEntry point | 3 TONMCL | Within the limit |
| ColorA measure of visible tint in the water. | 4.533613445378151 UNITSAverageSource water | 15 UNITSMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.2816666666666666 NTUAverageSource water | 5 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 142.81649484536084 MG/LAverageSource water | None set | Detected — no federal limit |
| Bicarbonate | 137 mg/LAverageLocal Treated Surface Water | None set | Detected — no federal limit |
+By source (2)— Local Treated Surface Water, Local Treated Groundwater
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 233.5894736842105 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8.332142857142857 PHAverageEntry point | None set | Detected — no federal limit |
| TemperatureThe measured temperature of the water sample. | 23.8125 CAverageEntry point | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LAverageImported MWD Treated Water | None set | Detected — no federal limit |
+By source (4)— Imported MWD Treated Water, Local Treated Surface Water, Local and Imported +1 more
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 2.0514563106796118 UG/LAverageSource water | 6 UG/LMCL | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 25.70625 UG/LAverageDistribution | 80 UG/LMCL | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 16.640416666666667 UG/LAverageDistribution | 60 UG/LMCL | Within the limit |
| Chlorite | 0.095675 MG/LAverageEntry point | 1 MG/LMCL | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Bromodichloroacetic acidA brominated haloacetic acid disinfection byproduct. | 1.3 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 7.770625 UG/LAverageDistribution | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 1.9124999999999999 UG/LAverageDistribution | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 8.715833333333334 UG/LAverageDistribution | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 7.293958333333333 UG/LAverageDistribution | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 4.193333333333333 PCI/LAverageEntry point | 15 PCI/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 5.13 PCI/LAverageEntry point | 50 PCI/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.9378260869565218 PCI/LAverageSource water | 20 PCI/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.24078260869565216 PCI/LAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2.7664102564102566 MG/LAverageEntry point | 10 MG/LMCL | Within the limit |
| SulfateA naturally occurring mineral from rock and soil. | 119.3 MG/LAverageEntry point | 500 MG/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.2962068965517241 MG/LAverageSource water | 2 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 57.45609756097561 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | 0.11310294117647059 MG/LAverageSource water | 1 MG/LMCL | Within the limit |
| Trichloroacetic acidA haloacetic acid disinfection byproduct. | 1.3 ug/LAverageLocal and Imported | 20 ug/LPublic health goal | Within the limit |
| Ammonia | Not detected MG/LHighest single sampleSource water | None set | None detected |
| Cyanide | Not detected UG/LHighest single sampleEntry point | 150 UG/LMCL | None detected |
| BromideA naturally occurring salt found in source water. | 0.1683333333333333 MG/LAverageSource water | None set | Detected — no federal limit |
| Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct. | 3.9 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
| Chlorodibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 1 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
| Dibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 2.5 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
| Dichloroacetic acidA haloacetic acid disinfection byproduct. | 4.9 ug/LAverageLocal and Imported | 0 ug/LPublic health goal | Detected — no federal limit |
| Monobromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.3 ug/LAverageLocal and Imported | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 2.682241379310345 MG/LAverageSource water | 10 MG/LMCL | Within the limit |
| Chromium | 0.6926829268292682 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Carbofuran | Not detected UG/LHighest single sampleSource water | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Chlordane | Not detected UG/LHighest single sampleSource water | 0.1 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleEntry point | 70 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| Deha | Not detected UG/LHighest single sampleSource water | 400 UG/LMCL | None detected |
| Dehp | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Dinoseb | Not detected UG/LHighest single sampleEntry point | 7 UG/LMCL | None detected |
| Diquat | Not detected UG/LHighest single sampleEntry point | 20 UG/LMCL | None detected |
| Edb | Not detected UG/LHighest single sampleSource water | 0.05 UG/LMCL | None detected |
| Endothall | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Endrin | Not detected UG/LHighest single sampleEntry point | 2 UG/LMCL | None detected |
| Glyphosate | Not detected UG/LHighest single sampleEntry point | 700 UG/LMCL | None detected |
| Heptachlor | Not detected UG/LHighest single sampleEntry point | 0.01 UG/LMCL | None detected |
| Heptachlor Epoxide | Not detected UG/LHighest single sampleSource water | 0.01 UG/LMCL | None detected |
| Hexachlorobenzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Hexachlorocyclopentadiene | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Methoxychlor | Not detected UG/LHighest single sampleSource water | 30 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Pcb Total | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleSource water | 500 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Toxaphene | Not detected UG/LHighest single sampleSource water | 3 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleEntry point | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleEntry point | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Twofourd | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Dbaa | 3.1631250000000004 UG/LAverageDistribution | None set | Detected — no federal limit |
| Dcaa | 6.520833333333333 UG/LAverageDistribution | None set | Detected — no federal limit |
| Mbaa | 3.2158333333333338 UG/LAverageDistribution | None set | Detected — no federal limit |
| Mcaa | 1.1154166666666667 UG/LAverageDistribution | None set | Detected — no federal limit |
| Tcaa | 3.357083333333333 UG/LAverageDistribution | None set | Detected — no federal limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleEntry point | None set | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 1.035483870967742 NG/LAverageSource water | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.2467741935483871 NG/LAverageSource water | None set | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.211290322580645 NG/LAverageSource water | None set | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.0870967741935484 NG/LAverageSource water | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleSource water | 0.005 UG/LMCL | None detected |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleEntry point | 0.2 UG/LMCL | None detected |
| ChloroethaneA volatile organic compound used in some industrial processes. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| Chloromethane | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Dalapon | Not detected UG/LHighest single sampleEntry point | 200 UG/LMCL | None detected |
| Dichlorodifluoromethane | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| Dichloromethane | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleEntry point | 300 UG/LMCL | None detected |
| Simazine | Not detected UG/LHighest single sampleEntry point | 4 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleEntry point | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleEntry point | 1750 UG/LMCL | None detected |
Source: Irvine Ranch Water District, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about Irvine Ranch Water District, CA's water
+Is Irvine Ranch Water District, CA tap water safe to drink in 2023?
Every one of the 143 contaminants measured in Irvine Ranch Water District, CA's 2023 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Irvine Ranch Water District, CA tap water?
143 contaminants were measured in Irvine Ranch Water District, CA's 2023 Consumer Confidence Report, spanning other, metals, and pfas ("forever chemicals"). 85 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Irvine Ranch Water District, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Manganese. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Irvine Ranch Water District, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Irvine Ranch Water District, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.
More water systems in CA
City of Tustin — Tustin, CaCity of Santa AnaCity of Santa AnaMesa Water District — Costa Mesa, CaMesa Del Toro MwcMesa Del Toro MwcCity of Newport Beach — Newport Beach, CaCity of Huntington BeachCity of FullertonCity of FullertonCity of Buena Park — Buena Park, CaChino Hills, City of — Chino Hills, CaLakewood - City, Water Dept. — Lakewood, CaChino, City of — Chino, CaPomona - City, Water Dept.Pomona - City, Water Dept.Covina-city, Water Dept.Ontario Municipal Utilities CompanyEl Monte-city, Water Dept.Lynwood-city, Water Dept. — Lynwood, CaMonterey Park-city, Water Dept. — Monterey Park, CaRancho Estates Mutual Water Co.City of Alhambra — Alhambra, CaRiversideAll water systems →