California tap water quality
3,059 community water systems
11.9%
exceed lead action level
(358/3000 systems)
(358/3000 systems)
23.6%
PFOA/PFOS detected
(163/690 systems)
(163/690 systems)
Largest water systems
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that system.
| System | City | Population | Lead (p90) |
|---|---|---|---|
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | LOS ANGELES | 3,875,566 | 0.0130 mg/L |
| EAST BAY MUD | 1,442,800 | 0.0070 mg/L | |
| SAN DIEGO, CITY OF | SAN DIEGO | 1,385,379 | 0.0140 mg/L |
| SAN JOSE WATER | 1,039,920 | 0.0069 mg/L | |
| SFPUC CITY DISTRIBUTION DIVISION | 848,019 | 0.0130 mg/L | |
| EASTERN MUNICIPAL WD | 666,581 | 0.0110 mg/L | |
| CITY OF FRESNO | FRESNO | 545,716 | 0.0080 mg/L |
| CITY OF SACRAMENTO MAIN | SACRAMENTO | 527,979 | 0.0740 mg/L |
| LONG BEACH UTILITIES DEPARTMENT | LONG BEACH | 466,772 | 0.0050 mg/L |
| IRVINE RANCH WATER DISTRICT | 444,800 | 0.0050 mg/L | |
| CITY OF ANAHEIM | ANAHEIM | 348,593 | 0.0050 mg/L |
| ALAMEDA COUNTY WATER DISTRICT | 344,000 | 0.0142 mg/L | |
| CITY OF SANTA ANA | SANTA ANA | 310,539 | 0.0050 mg/L |
| RIVERSIDE, CITY OF | RIVERSIDE | 298,398 | 0.0051 mg/L |
| SANTA CLARITA VALLEY WATER AGENCY | 294,090 | 0.0065 mg/L | |
| GSWC - SOUTHWEST | 277,740 | 0.0050 mg/L | |
| HELIX WATER DISTRICT | 277,668 | 0.0050 mg/L | |
| COACHELLA VWD: COVE COMMUNITY | 270,000 | 0.0050 mg/L | |
| CWS - BAKERSFIELD | 267,881 | 0.0060 mg/L | |
| SAN GABRIEL VALLEY WATER CO.-EL MONTE | 248,000 | 0.0050 mg/L | |
| OTAY WATER DISTRICT | 238,008 | 0.0050 mg/L | |
| SAN GABRIEL VALLEY WC - FONTANA | 237,700 | 0.0050 mg/L | |
| MODESTO, CITY OF | MODESTO | 218,771 | 0.0045 mg/L |
| SAN BERNARDINO CITY | SAN BERNARDIN0 | 214,665 | 0.0080 mg/L |
| CUCAMONGA VALLEY WATER DISTRICT | 211,069 | 0.0050 mg/L | |
| LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER | 208,129 | 0.0558 mg/L | |
| CITY OF HUNTINGTON BEACH | HUNTINGTON BEACH | 201,000 | 0.0068 mg/L |
| OXNARD WATER DEPT | 200,232 | 0.0079 mg/L | |
| CONTRA COSTA WATER DISTRICT | 198,000 | 0.0111 mg/L | |
| SACRAMENTO SUBURBAN WATER DISTRICT | 194,444 | 0.0043 mg/L | |
| CITY OF STOCKTON | STOCKTON | 191,302 | 0.0050 mg/L |
| SWEETWATER AUTHORITY | 191,282 | 0.0094 mg/L | |
| GLENDALE-CITY, WATER DEPT. | GLENDALE | 188,784 | 0.0080 mg/L |
| MARIN MUNICIPAL WATER DISTRICT | 186,895 | 0.0060 mg/L | |
| ONTARIO MUNICIPAL UTILITIES COMPANY | ONTARIO | 185,010 | 0.0050 mg/L |
| SCWA - LAGUNA/VINEYARD | 184,896 | 0.0040 mg/L | |
| CALIFORNIA WATER SERVICE - STOCKTON | 176,266 | 0.0050 mg/L | |
| SANTA ROSA, CITY OF | SANTA ROSA | 175,396 | 0.0057 mg/L |
| CITY OF GARDEN GROVE | GARDEN GROVE | 174,226 | 0.0040 mg/L |
| OCEANSIDE, CITY OF | OCEANSIDE | 171,483 | 0.0050 mg/L |
| MOULTON NIGUEL WATER DISTRICT | 170,236 | 0.0067 mg/L | |
| ELSINORE VALLEY MWD | 169,455 | 0.0050 mg/L | |
| SUBURBAN WATER SYSTEMS-SAN JOSE | 168,843 | 0.0050 mg/L | |
| CORONA, CITY OF | CORONA | 168,575 | 0.0060 mg/L |
| SANTA MARGARITA WATER DISTRICT | 168,289 | 0.0092 mg/L | |
| PASADENA WATER AND POWER | PASADENA | 164,344 | 0.0130 mg/L |
| CITY OF HAYWARD | HAYWARD | 162,954 | 0.0051 mg/L |
| BAKERSFIELD, CITY OF | BAKERSFIELD | 160,144 | 0.0090 mg/L |
| CITY OF SUNNYVALE | SUNNYVALE | 157,566 | 0.0050 mg/L |
| CITY OF ROSEVILLE | ROSEVILLE | 155,612 | 0.0031 mg/L |
| CALIFORNIA WATER SERVICE CO. - ELA | 152,474 | 0.0050 mg/L | |
| POMONA - CITY, WATER DEPT. | POMONA | 151,713 | 0.0090 mg/L |
| CWS - VISALIA | 148,496 | 0.0050 mg/L | |
| RANCHO CALIFORNIA WATER DISTRICT | 146,147 | 0.0050 mg/L | |
| CALIFORNIA WATER SERVICE CO. - DOMINGUEZ | 143,996 | 0.0050 mg/L | |
| CITY OF FULLERTON | FULLERTON | 139,461 | 0.0090 mg/L |
| ESCONDIDO, CITY OF | ESCONDIDO | 137,044 | 0.0050 mg/L |
| VICTORVILLE WATER DISTRICT | 135,983 | 0.0050 mg/L | |
| JURUPA COMMUNITY SD | 135,093 | 0.0063 mg/L | |
| VISTA IRRIGATION DISTRICT | 132,430 | 0.0050 mg/L | |
| EL DORADO ID - MAIN | 132,171 | 0.0140 mg/L | |
| CITY OF SANTA CLARA | SANTA CLARA | 130,746 | 0.0060 mg/L |
| CITY OF CLOVIS | CLOVIS | 130,130 | 0.0025 mg/L |
| PALMDALE WATER DIST. | 126,804 | 0.0050 mg/L | |
| CWSC SALINAS | 123,679 | 0.0050 mg/L | |
| CITY OF VALLEJO | VALLEJO | 121,420 | 0.0060 mg/L |
| CITY OF ORANGE | ORANGE | 120,770 | 0.0047 mg/L |
| CITY OF FAIRFIELD | FAIRFIELD | 120,377 | 0.0120 mg/L |
| CITY OF ANTIOCH | ANTIOCH | 115,074 | 0.0120 mg/L |
| CAL-WATER SERVICE CO.-CHICO | 114,925 | 0.0010 mg/L | |
| GOLDEN STATE WC - WEST ORANGE COUNTY | 114,379 | 0.0050 mg/L | |
| VENTURA WATER DEPARTMENT | 113,500 | 0.0130 mg/L | |
| VALLECITOS WD | 113,500 | 0.0050 mg/L | |
| DOWNEY - CITY, WATER DEPT. | DOWNEY | 110,556 | 0.0100 mg/L |
| GREAT OAKS WC INC | 110,088 | 0.0160 mg/L | |
| AZUSA LIGHT AND WATER | 110,044 | 0.0051 mg/L | |
| MESA WATER DISTRICT | 110,000 | 0.0080 mg/L | |
| SAN BERNARDINO VALLEY WD | 109,608 | — | |
| CITY OF SANTA MARIA UTILITIES DEPARTMENT | 109,477 | 0.0074 mg/L | |
| EAST VALLEY WATER DISTRICT | 108,629 | 0.0097 mg/L | |
| TORRANCE-CITY, WATER DEPT. | TORRANCE | 106,183 | 0.0150 mg/L |
| CAL-AM WATER CORONADO | 106,000 | 0.0050 mg/L | |
| BURBANK-CITY, WATER DEPT. | BURBANK | 105,603 | 0.0070 mg/L |
| CITY OF DALY CITY | DALY CITY | 104,901 | 0.0142 mg/L |
| WEST VALLEY WATER DISTRICT | 104,498 | 0.0110 mg/L | |
| CALIFORNIA WATER SERVICE - SAN MATEO | 102,348 | 0.0243 mg/L | |
| CITY OF SAN JOSE - EVG/EDV/COY | SAN JOSE | 101,265 | 0.0100 mg/L |
| WALNUT VALLEY WATER DISTRICT | 100,941 | 0.0060 mg/L | |
| HESPERIA WD | 100,744 | 0.0083 mg/L | |
| SOUTH TAHOE PUD - MAIN | 100,000 | 0.0072 mg/L | |
| CITY OF VACAVILLE | VACAVILLE | 99,650 | 0.0071 mg/L |
| CITY OF SANTA BARBARA WATER DEPARTMENT | SANTA BARBARA | 99,323 | 0.0032 mg/L |
| DUBLIN SAN RAMON SERVICES DISTRICT | 98,776 | 0.0220 mg/L | |
| CALIFORNIA WATER SERVICE CO. - HERM/REDO | 96,853 | 0.0069 mg/L | |
| TRACY, CITY OF | TRACY | 96,609 | 0.0030 mg/L |
| CARLSBAD MWD | 95,158 | 0.0050 mg/L | |
| VENTURA WWD NO. 8 - SIMI VALLEY | 94,738 | 0.0085 mg/L | |
| SANTA CRUZ WATER DEPARTMENT | 94,626 | 0.0074 mg/L | |
| PADRE DAM MWD | 93,980 | 0.0090 mg/L | |
| CITY OF MERCED | MERCED | 93,692 | 0.0069 mg/L |