Riverside County
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Riverside County · tap water by city

Riverside County tap water, city by city.

FilteredWTR tracks 33 public water systems in Riverside County, and their own population counts add up to 2,568,513 people. Over the last three years two of them picked up health-based violations on the EPA record: City of Norco and Idyllwild Water District. In the latest round of lead testing, 21 systems reported a 90th-percentile result of zero. One came in at or above 0.0075 mg/L, half the federal action level of 0.015 mg/L.

Water systems in Riverside County

The largest systems come first. Lead is each system's most recent 90th-percentile result from the federal Lead and Copper Rule, and the last column counts health-based violations from the last three years. Systems sample on their own schedules, so their monitoring periods end anywhere from 2023 to 2026.

Water systemCities servedPeople servedLatest lead (90th percentile)Recent health violations
Eastern Municipal WDMenifee, Moreno Valley, Perris, Winchester659,9230.0028 mg/L, period ending 20250
City of RiversideRiverside302,7760.001 mg/L, period ending 20250
Coachella VWD: Cove CommunityCathedral City, La Quinta, Palm Desert, Rancho Mirage270,000Not detected, period ending 20240
Elsinore Valley MWDLake Elsinore, Wildomar169,4550.0013 mg/L, period ending 20250
City of CoronaCorona169,3800.0018 mg/L, period ending 20260
Rancho California Water DistrictTemecula146,147Not detected, period ending 20250
Jurupa Community SDEastvale, Jurupa Valley, Mira Loma134,638Not detected, period ending 20250
Indio Water AuthorityIndio89,137Not detected, period ending 20250
Western MWDNot listed87,9550.0013 mg/L, period ending 20250
Desert Water AgencyPalm Springs75,588Not detected, period ending 20240
Beaumont Cherry Valley WDNot listed66,8410.0078 mg/L, period ending 20240
Lake Hemet MWDNot listed52,913Not detected, period ending 20250
Coachella Water AuthorityCoachella43,590Not detected, period ending 20230
Mission Springs WDNot listed43,484Not detected, period ending 20230
Rubidoux Community SDNot listed38,522Not detected, period ending 20260
City of HemetHemet33,591Not detected, period ending 20250
City of BanningBanning31,680Not detected, period ending 20240
City of NorcoNorco25,068Not detected, period ending 20241
Temescal Valley Water DistrictTemescal Valley22,268Not detected, period ending 20260
City of San JacintoSan Jacinto20,9380.0012 mg/L, period ending 20230
Western MWD - Murrieta DivisionMurrieta17,8370.0015 mg/L, period ending 20250
South Mesa WCNot listed10,348Not detected, period ending 20250
Blythe - City ofBlythe9,7350.0055 mg/L, period ending 20250
Myoma Dunes Mutual Water CompanyNot listed9,445Not detected, period ending 20240
Nuevo Water CompanyNot listed6,7330.0029 mg/L, period ending 20250
Santa Ana River Water CompanyNot listed6,475Not detected, period ending 20240
Coachella VWD: I.D. No. 8Not listed4,700Not detected, period ending 20250
Chuckawalla Valley State PrisonNot listed4,3310.001 mg/L, period ending 20240
Farm Mutual W.C. (The)Not listed4,026Not detected, period ending 20240
Idyllwild Water DistrictIdyllwild3,7620.0029 mg/L, period ending 20252
Box Springs Mutual WCNot listed3,382Not detected, period ending 20250
Home Gardens County WDNot listed3,095Not detected, period ending 20240
California Rehabilitation Center - NorcoNot listed750Not detected, period ending 20250

Find your city

Each report covers the water system that serves that city, with its measured results and its full EPA compliance history.

What these numbers mean

Every system has to collect tap samples from a set list of homes and report the lead level at the 90th percentile. Nine out of ten sampled homes came in at or below that figure. The federal action level is 0.015 mg/L, and a system that goes over it has to take corrective steps and tell its customers. A zero means the samples came back below what the lab can detect.

A health-based violation means the system broke a rule tied to health, such as going over a contaminant limit or missing a required treatment step. Late paperwork and skipped reports go on the EPA record too, and this page leaves those out.

These figures describe the water each system sends out, and the water at your own faucet can test differently. Lead most often enters from a home's own pipes and fixtures, so houses built before 1986 are worth a closer look. Chlorine levels also drift with how far a street sits from the treatment plant.

Free local water test

See your own water in person before spending money on treatment.

A local FilteredWTR tech screens the water at your faucet for hardness, chlorine and sediment and explains each reading while you watch. The visit is free, and afterward the decision stays yours.

Text 949-414-9944 for a free water test

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