ClearWater › All States › California

California Tap Water Quality

EPA water quality data for 150 community water systems serving 3,388,772+ people in California. Click any system to see violations, lead testing results, and a safety grade.

EAST BAY MUD OAKLAND, CA · 1,442,800 people · Surface Water ALAMEDA COUNTY WATER DISTRICT FREMONT, CA · 344,000 people · Surface Water CONTRA COSTA WATER DISTRICT CONCORD, CA · 198,000 people · Surface Water CITY OF HAYWARD HAYWARD, CA · 162,954 people · Surface Water Purchased EL DORADO ID - MAIN PLACERVILLE, CA · 132,171 people · Surface Water CITY OF ANTIOCH ANTIOCH, CA · 115,074 people · Surface Water CAL-WATER SERVICE CO.-CHICO SAN JOSE, CA · 114,925 people · Groundwater SOUTH TAHOE PUD - MAIN SOUTH LAKE TAHOE, CA · 100,000 people · Groundwater DUBLIN SAN RAMON SERVICES DISTRICT PLEASANTON, CA · 98,776 people · Surface Water Purchased CITY OF PLEASANTON PLEASANTON, CA · 76,689 people · Surface Water Purchased BRENTWOOD BRENTWOOD, CA · 64,513 people · Surface Water Purchased CITY OF PITTSBURG PITTSBURG, CA · 62,500 people · Surface Water Purchased CALIFORNIA WATER SERVICE - LIVERMORE SAN JOSE, CA · 60,414 people · Surface Water Purchased DIABLO WATER DISTRICT OAKLEY, CA · 43,357 people · Surface Water Purchased CITY OF LIVERMORE LIVERMORE, CA · 38,892 people · Surface Water Purchased CITY OF MARTINEZ MARTINEZ, CA · 30,997 people · Surface Water Purchased GOLDEN STATE WATER COMPANY - BAY POINT RANCHO CORDOVA, CA · 23,731 people · Surface Water Purchased SOUTH FEATHER W&P - MINERS RANCH OROVILLE, CA · 22,664 people · Surface Water CITY OF CRESCENT CITY CRESCENT CITY, CA · 17,262 people · Groundwater TOWN OF DISCOVERY BAY DISCOVERY BAY, CA · 16,790 people · Groundwater THERMALITO WATER & SEWER DIST OROVILLE, CA · 12,136 people · Surface Water CCWD - EBBETTS PASS SAN ANDREAS, CA · 11,545 people · Surface Water CAL-WATER SERVICE CO.-OROVILLE SAN JOSE, CA · 11,106 people · Surface Water DEL ORO WATER CO.-PARADISE PINES CHICO, CA · 10,940 people · Surface Water Purchased CCWD - JENNY LIND SAN ANDREAS, CA · 9,861 people · Surface Water GEORGETOWN DIVIDE PUD GEORGETOWN, CA · 9,434 people · Surface Water PLACERVILLE, CITY OF - MAIN PLACERVILLE, CA · 9,224 people · Surface Water Purchased PARADISE IRRIGATION DISTRICT PARADISE, CA · 9,142 people · Surface Water AWA BUCKHORN PLANT SUTTER CREEK, CA · 8,791 people · Surface Water KIRKWOOD MEADOWS PUBLIC UTILITY DISTRICT KIRKWOOD, CA · 7,851 people · Groundwater CITY OF GRIDLEY GRIDLEY, CA · 7,269 people · Groundwater AWA, IONE SUTTER CREEK, CA · 7,227 people · Surface Water CITY OF COLUSA COLUSA, CA · 6,447 people · Groundwater CALAVERAS PUD SAN ANDREAS, CA · 6,286 people · Surface Water CITY OF WILLIAMS WILLIAMS, CA · 5,538 people · Groundwater CCWD - COPPER COVE SAN ANDREAS, CA · 5,187 people · Surface Water CITY OF JACKSON JACKSON, CA · 5,019 people · Surface Water Purchased AWA, TANNER SUTTER CREEK, CA · 4,940 people · Surface Water BLUE LAKE SPRINGS MUT WTR ARNOLD, CA · 4,841 people · Surface Water Purchased UNION PUBLIC UTILITY DISTRICT MURPHYS, CA · 4,774 people · Surface Water ANGELS, CITY OF ANGELS CAMP, CA · 3,836 people · Surface Water JACKSON VALLEY IRRIGATION DISTRICT IONE, CA · 3,553 people · Surface Water LUKINS BROTHERS WATER COMPANY SOUTH LAKE TAHOE, CA · 3,277 people · Groundwater ARBUCKLE PUBLIC UTILITY DISTRICT ARBUCKLE, CA · 2,778 people · Groundwater LAKESIDE PARK ASSOCIATION SOUTH LAKE TAHOE, CA · 2,648 people · Surface Water BERTSCH OCEAN VIEW CSD CRESCENT CITY, CA · 2,570 people · Groundwater Purchased SMITH RIVER C.S.D. SMITH RIVER, CA · 2,568 people · Groundwater AWA - CAMANCHE VILLAGE SUTTER CREEK, CA · 2,402 people · Groundwater CITY OF BIGGS BIGGS, CA · 2,060 people · Groundwater DURHAM IRRIGATION DISTRICT DURHAM, CA · 1,581 people · Groundwater TAHOE KEYS WATER COMPANY SOUTH LAKE TAHOE, CA · 1,420 people · Groundwater ALAMEDA POINT OAKLAND, CA · 1,400 people · Surface Water Purchased GRIZZLY FLATS COMMUNITY SERVIC GRIZZLY FLATS, CA · 1,374 people · Surface Water MAXWELL PUBLIC UTILITY DISTRICT MAXWELL, CA · 1,175 people · Groundwater PINE GROVE COMM SERV DIST PINE GROVE, CA · 1,141 people · Surface Water Purchased PLYMOUTH, CITY OF PLYMOUTH, CA · 1,060 people · Surface Water Purchased CCWD - WEST POINT SAN ANDREAS, CA · 1,043 people · Surface Water CAMANCHE NORTH SHORE INC. VALLEY SPRINGS, CA · 922 people · Groundwater VALLEY SPRINGS PUD VALLEY SPRINGS, CA · 900 people · Groundwater DEL ORO WATER CO.-LIME SADDLE MARINA CHICO, CA · 895 people · Surface Water FIRST MACE MEADOW # 1 PINE GROVE, CA · 838 people · Surface Water Purchased CAMANCHE SOUTH SHORE-EBMUD VALLEY SPRINGS, CA · 828 people · Surface Water TAHOE CITY PUD - RUBICON TAHOE CITY, CA · 703 people · Groundwater SNOWSHOE SPRINGS ASSN. ARNOLD, CA · 686 people · Surface Water Purchased GASQUET C.S.D. GASQUET, CA · 657 people · Surface Water BIG ROCK C.S.D. CRESCENT CITY, CA · 650 people · Groundwater PLEASANTIMES MUTUAL WATER CO BETHEL ISLAND, CA · 644 people · Groundwater LAKE ALPINE WATER COMPANY BEAR VALLEY, CA · 625 people · Surface Water RIVER PINES PUD RIVER PINES, CA · 574 people · Groundwater CLAYTON PALMS WATER CLAYTON, CA · 549 people · Surface Water Purchased LANARE COMMUNITY SERVICES DIST COALINGA, CA · 540 people · Groundwater EL DORADO ID - OUTINGDALE PLACERVILLE, CA · 535 people · Surface Water CASTLEWOOD DOMESTIC WATER SYSTEM PLEASANTON, CA · 524 people · Groundwater Purchased DEL ORO WATER CO.-STIRLING BLUFFS CHICO, CA · 521 people · Surface Water COLUSA CO. WWD #1 - GRIMES GRIMES, CA · 512 people · Groundwater WILLOW MOBILE HOME PARK MARTINEZ, CA · 481 people · Groundwater GRIDLEY FARM LABOR HOUSING CHICO, CA · 460 people · Groundwater TRAILER HAVEN MOBILE HOME PARK SACRAMENTO, CA · 459 people · Surface Water Purchased FCSA 05 - WILDWOOD ISLAND FRESNO, CA · 417 people · Groundwater EL DORADO ID - STRAWBERRY PLACERVILLE, CA · 400 people · Surface Water BUTTE CREEK ESTATES MUTUAL WATER CO CHICO, CA · 399 people · Groundwater COLUSA CO. WWD #2 - PRINCETON PRINCETON, CA · 382 people · Groundwater WILLOW PARK MARINA OAKLEY, CA · 380 people · Groundwater LAS DELTAS MUTUAL WATER COMPANY CLOVIS, CA · 375 people · Groundwater Purchased KLAMATH C.S.D. KLAMATH, CA · 360 people · Groundwater ORWOOD RESORT BRENTWOOD, CA · 350 people · Groundwater SHAVER LAKE HEIGHTS WATER ASSN PRATHER, CA · 345 people · Groundwater DEL ORO WATER CO.-MAGALIA CHICO, CA · 340 people · Groundwater DELTA MUTUAL WATER COMPANY OAKLEY, CA · 333 people · Groundwater PLEASANT GROVE MHP OROVILLE, CA · 327 people · Groundwater EASTON ESTATES WATER COMPANY FRESNO, CA · 302 people · Groundwater HOPE FOUNDATION/MORIAH HEIGHTS PLYMOUTH, CA · 299 people · Groundwater LAKE MADRONE WATER DISTRICT BERRY CREEK, CA · 297 people · Groundwater FCWWD 42/ALLUVIAL & FANCHER FRESNO, CA · 291 people · Groundwater GRAN MUTUAL WATER CO CHICO, CA · 290 people · Groundwater ANGELS CAMP RV/CAMPING RESORT ANGELS CAMP, CA · 288 people · Groundwater TOWN OF SUNOL - SFPUC BURLINGAME, CA · 281 people · Surface Water Purchased GOLDEN FEATHER MHP SACRAMENTO, CA · 275 people · Groundwater BELMONT WATER CORPORATION FRESNO, CA · 264 people · Groundwater CCWD - WALLACE SAN ANDREAS, CA · 255 people · Groundwater ALMOND GROVE MOBILE PARK CHICO, CA · 253 people · Groundwater COLUSA CO. SERVICE AREA #2-STONYFORD CITY OF COLUSA, CA · 250 people · Groundwater NORTHCREST TRAILER CITY STOCKTON, CA · 250 people · Groundwater COLUSA CO. SERVICE AREA #1-CENTURY RANCH CITY OF COLUSA, CA · 246 people · Surface Water FCSA 30 - EL PORVENIR FRESNO, CA · 241 people · Surface Water MEADOW LAKES CLUB FRESNO, CA · 240 people · Groundwater FIRST MACE MEADOWS UNIT NO. 2 PINE GROVE, CA · 230 people · Surface Water Purchased RIVERVIEW WATER ASSOCIATION BETHEL ISLAND, CA · 230 people · Groundwater DRYTOWN COUNTY WATER DISTRICT IONE, CA · 221 people · Surface Water Purchased DINGERVILLE USA PARK YORBA LINDA, CA · 220 people · Groundwater CAMINO MOBILEHOME OAKLEY, CA · 210 people · Groundwater BETHEL ISLAND ESTATES SACRAMENTO, CA · 200 people · Groundwater REDWOOD PARK C.S.D. KLAMATH, CA · 200 people · Groundwater FCWWD 40 - SHAVER SPRINGS FRESNO, CA · 196 people · Groundwater AWA LA MEL HEIGHTS #3 SUTTER CREEK, CA · 188 people · Groundwater DEL ORO WC - ARBUCKLE DISTRICT CHICO, CA · 185 people · Groundwater BETHEL ISLAND MHC STOCKTON, CA · 185 people · Groundwater HRC C.S.D. CRESCENT CITY, CA · 185 people · Groundwater FCWWD 38/SKY HARBOUR FRESNO, CA · 185 people · Groundwater FOOTHILLS MANUFACTURED HOME COMMUNUTY OROVILLE, CA · 180 people · Groundwater MARKLEEVILLE WATER CO. MARKLEEVILLE, CA · 175 people · Surface Water OAKLEY MUTUAL WATER COMPANY OAKLEY, CA · 170 people · Groundwater KEEFER CREEK ESTATES CHICO, CA · 160 people · Groundwater BIG OAK MOBILE HOME PARK WATER OAKLEY, CA · 156 people · Groundwater YOUTH WITH A MISSION-SPRINGS OF LIVING W RICHARDSON SPRINGS, CA · 150 people · Groundwater RITE OF PASSAGE/SIERRA RIDGE SAN ANDREAS, CA · 150 people · Surface Water KYBURZ MUTUAL WATER COMPANY KYBURZ, CA · 150 people · Surface Water PINE GROVE TRAILER PARK STOCKTON, CA · 142 people · Groundwater FARRAR PARK PROPERTY OWNERS BETHEL ISLAND RD, CA · 140 people · Groundwater GOLD BEACH PARK STOCKTON, CA · 134 people · Groundwater FCSA 10 - CUMORAH KNOLLS FRESNO, CA · 132 people · Groundwater FCWWD 37/MILE HIGH FRESNO, CA · 129 people · Groundwater RIVERVIEW MOBILE HOME PARK SACRAMENTO, CA · 126 people · Groundwater BETHEL ISLAND MUTUAL WATER CO BETHEL ISLAND, CA · 123 people · Groundwater SIERRA MOON MUTUAL WATER COMPANY CHICO, CA · 120 people · Groundwater LAS PALMAS MOBILE HOME PARK EUREKA, CA · 120 people · Groundwater NEW AUBERRY WATER ASSOCIATION AUBERRY, CA · 120 people · Groundwater FOREST RANCH MUTUAL WATER SYSTEM FOREST RANCH, CA · 119 people · Groundwater FCSA 14 - BELMONT MANOR FRESNO, CA · 115 people · Groundwater WEST PARK PROPERTIES CRESCENT CITY, CA · 112 people · Groundwater CRYSTAL CAVES MHP PLACERVILLE, CA · 112 people · Groundwater RUSSOS MOBILE PARK BETHEL ISLAND, CA · 110 people · Groundwater DEL ORO WATER COMPANY - BUZZTAIL DIST. CHICO, CA · 106 people · Groundwater VOLCANO COMMUNITY SERVICE DIST VOLCANO, CA · 103 people · GWUDI FIDDLETOWN COMMUNITY SERVICE FIDDLETOWN, CA · 100 people · Groundwater SANDMOUND MUTUAL BETHEL ISLAND, CA · 100 people · Groundwater BEAR STATE WATER WORKS GEORGETOWN, CA · 100 people · Groundwater LILI VALLEY WATER CO. WEST POINT, CA · 99 people · Groundwater DUNROVIN MOBILE HOME VILLAGE CONCORD, CA · 99 people · Groundwater ANGLERS SUBDIVISION 4 BETHEL ISLAND, CA · 99 people · Groundwater