Surface Water Systems in California

164 community drinking-water systems in Californiamatching this source-type cohort.

Systems that draw primarily from rivers, lakes, or reservoirs. Surface water systems face treatment complexity, seasonal variability, watershed protection demands, and exposure to drought and climate patterns.

SystemPop. ServedMISIBand

LOS ANGELES-CITY, DEPT. OF WATER & POWER3.9M37.877Watch

EAST BAY MUD1.4M34.589Watch

SAN DIEGO, CITY OF1.4M22.936Watch

SAN JOSE WATER COMPANY1.0M40.023Fragile

SFPUC CITY DISTRIBUTION DIVISION848K42.049Fragile

EASTERN MUNICIPAL WD667K22.605Watch

CITY OF FRESNO546K31.192Watch

CITY OF SACRAMENTO MAIN520K31.192Watch

LONG BEACH-CITY, WATER DEPT.467K37.113Watch

IRVINE RANCH WATER DISTRICT445K46.510Fragile

CITY OF ANAHEIM349K41.899Fragile

ALAMEDA COUNTY WATER DISTRICT344K30.924Watch

CITY OF SANTA ANA311K36.713Watch

SACRAMENTO CITY-DIV WTR & SWR310K7.988Stable

RIVERSIDE, CITY OF298K20.688Watch

SANTA CLARITA WATER DIVISION F294K29.414Watch

GSWC - SOUTHWEST278K29.414Watch

HELIX WATER DISTRICT278K26.682Watch

CWS - BAKERSFIELD268K26.682Watch

OTAY WATER DISTRICT238K22.936Watch

SAN GABRIEL VALLEY WC - FONTANA238K18.684Stable

MODESTO, CITY OF219K26.682Watch

CUCAMONGA VALLEY WATER DISTRICT211K18.684Stable

CITY OF HUNTINGTON BEACH201K29.097Watch

OXNARD WATER DEPT200K30.345Watch

CONTRA COSTA WATER DISTRICT198K32.839Watch

SACRAMENTO SUBURBAN WATER DISTRICT194K31.192Watch

CITY OF STOCKTON191K31.821Watch

SWEETWATER AUTHORITY191K26.682Watch

GLENDALE-CITY, WATER DEPT.189K34.991Watch

MARIN MUNICIPAL WATER DISTRICT187K11.154Stable

ONTARIO MUNICIPAL UTILITIES COMPANY185K29.596Watch

SCWA - LAGUNA/VINEYARD185K35.608Watch

CALIFORNIA WATER SERVICE - STOCKTON176K20.688Watch

CITY OF GARDEN GROVE174K32.843Watch

OCEANSIDE, CITY OF171K31.192Watch

MOULTON NIGUEL WATER DISTRICT170K36.589Watch

ELSINORE VALLEY MWD169K30.861Watch

SUBURBAN WATER SYSTEMS-SAN JOSE F169K34.618Watch

CORONA, CITY OF169K43.898Fragile

SANTA MARGARITA WATER DISTRICT168K32.843Watch

PASADENA-CITY, WATER DEPT.164K37.587Watch

CITY OF HAYWARD163K22.930Watch

BAKERSFIELD, CITY OF160K30.428Watch

CITY OF SUNNYVALE158K32.025Watch

CITY OF ROSEVILLE156K24.666Watch

CALIFORNIA WATER SERVICE CO. - ELA F152K25.668Watch

POMONA - CITY, WATER DEPT.152K32.411Watch

RANCHO CALIFORNIA WATER DISTRICT146K26.434Watch

CALIFORNIA WATER SERVICE CO. - DOMINGUEZ144K29.414Watch

CITY OF FULLERTON139K36.713Watch

ESCONDIDO, CITY OF137K22.936Watch

VICTORVILLE WATER DISTRICT136K26.682Watch

JURUPA COMMUNITY SD135K14.396Stable

VISTA IRRIGATION DISTRICT132K30.345Watch

EL DORADO ID - MAIN132K34.571Watch

CITY OF SANTA CLARA131K34.094Watch

CITY OF CLOVIS130K24.682Watch

PALMDALE WATER DIST.127K23.668Watch

CITY OF VALLEJO121K21.684Watch

CITY OF ORANGE121K29.097Watch

CITY OF FAIRFIELD120K27.613Watch

CITY OF ANTIOCH115K30.841Watch

GOLDEN STATE WC - WEST ORANGE114K29.097Watch

VENTURA WATER DEPARTMENT114K30.428Watch

VALLECITOS WD114K30.635Watch

AZUSA LIGHT AND WATER110K23.668Watch

MESA WATER DISTRICT110K29.097Watch

SANTA MARIA WATER DEPARTMENT109K18.942Stable

EAST VALLEY WATER DISTRICT109K35.145Watch

TORRANCE-CITY, WATER DEPT.106K33.662Watch

CALIFORNIA-AMERICAN WATER CO106K30.592Watch

BURBANK-CITY, WATER DEPT.106K29.452Watch

CITY OF DALY CITY105K33.662Watch

WEST VALLEY WATER DISTRICT104K22.384Watch

CALIFORNIA WATER SERVICE - SAN MATEO102K25.664Watch

CITY OF SAN JOSE - EVG/EDV/COY101K25.351Watch

WALNUT VALLEY WATER DISTRICT101K25.668Watch

CITY OF SANTA BARBARA WATER DEPARTMENT99K26.434Watch

DUBLIN SAN RAMON SERVICES DISTRICT99K25.347Watch

CITY OF VACAVILLE97K17.193Stable

CALIFORNIA WATER SERVICE CO. - HERM/REDO97K21.922Watch

TRACY, CITY OF97K20.193Watch

CARLSBAD MWD95K30.345Watch

VENTURA WWD NO. 8 - SIMI VALLEY95K15.145Stable

SANTA CRUZ WATER DEPARTMENT95K23.924Watch

PADRE DAM MWD94K26.682Watch

CITY OF REDWOOD CITY93K21.918Watch

CAL AM WATER COMPANY - MONTEREY92K31.192Watch

CITY OF WESTMINSTER91K25.351Watch

SANTA MONICA-CITY, WATER DIVISION90K21.922Watch

CITY OF REDDING90K29.176Watch

PLACER CWA - FOOTHILL90K16.668Stable

OLIVENHAIN MWD86K19.190Stable

CHINO, CITY OF86K15.145Stable

WESTERN MWD86K22.688Watch

MANTECA, CITY OF85K31.072Watch

NAPA, CITY OF85K22.419Watch

GOLETA WATER DISRICT84K20.193Watch

YORBA LINDA WATER DISTRICT84K25.351Watch

CITY OF BUENA PARK82K25.351Watch

CITY OF MILPITAS82K38.529Watch

CITY OF MOUNTAIN VIEW82K28.346Watch

FOLSOM, CITY OF - MAIN81K27.344Watch

INGLEWOOD- CITY, WATER DEPT.81K25.875Watch

CITY OF ALHAMBRA80K25.668Watch

UPLAND, CITY OF78K24.682Watch

REDLANDS CITY MUD-WATER DIV78K28.140Watch

CITY OF PLEASANTON77K33.345Watch

SOUTH GATE-CITY, WATER DEPT.76K19.922Stable

CHINO HILLS, CITY OF76K22.347Watch

COMPTON-CITY, WATER DEPT.75K25.875Watch

DESERT WATER AGENCY75K9.994Stable

TURLOCK, CITY OF73K14.855Stable

PARK WC - BELLFLOWER-NORWALK F73K21.922Watch

LAS VIRGENES MWD73K26.919Watch

CALIFORNIA WATER SERVICE CO. - PALOS VER71K21.922Watch

CITY OF YUBA CITY70K20.030Watch

CWSC LOS ALTOS SUBURBAN70K23.351Watch

CITY OF NEWPORT BEACH69K25.351Watch

LODI, CITY OF68K11.996Stable

CITRUS HEIGHTS WATER DISTRICT68K22.936Watch

CITY OF DAVIS67K26.456Watch

CITY OF PALO ALTO67K29.010Watch

LYNWOOD-CITY, WATER DEPT.67K25.875Watch

CAL AMERICAN WATER CO67K23.143Watch

CITY OF TUSTIN67K25.351Watch

WATSONVILLE, CITY OF65K23.924Watch

CITY OF BRENTWOOD65K25.351Watch

CALIFORNIA WATER SERVICE-S SAN FRANCISCO64K26.919Watch

GSWC - FLORENCE/GRAHAM64K21.922Watch

CITY OF LA HABRA63K29.014Watch

CITY OF PITTSBURG63K29.014Watch

NORTH MARIN WATER DISTRICT62K11.992Stable

CITY OF WOODLAND61K22.710Watch

CALIFORNIA WATER SERVICE - BEAR GULCH61K21.918Watch

CALIFORNIA WATER SERVICE - LIVERMORE60K33.345Watch

CITY OF FOUNTAIN VALLEY57K37.298Watch

GSWC-SAN DIMAS57K29.414Watch

MONTE VISTA CWD56K31.192Watch

PARAMOUNT - CITY, WATER DEPT.55K21.922Watch

GSWC - BELL, BELL GARDENS55K21.922Watch

CALAM - SUBURBAN55K24.682Watch

ROWLAND WATER DISTRICT55K29.414Watch

CITY OF LINCOLN55K18.920Stable

CERES, CITY OF55K33.779Watch

RIALTO, CITY OF54K17.190Stable

CITY OF WEST SACRAMENTO53K25.638Watch

THOUSAND OAKS WATER DEPT53K17.188Stable

YUCAIPA VALLEY WATER DISTRICT52K33.068Watch

EL TORO WATER DISTRICT52K25.351Watch

CITY OF SAN CLEMENTE52K25.351Watch

CALAM - PARKWAY51K17.190Stable

GOLDEN STATE WC - PLACENTIA50K29.097Watch

GLENDORA-CITY, WATER DEPT.50K17.877Stable

POWAY, CITY OF50K28.782Watch

UC - DAVIS50K34.657Watch

CITY OF BREA48K37.008Watch

CALAM - LINCOLN OAKS48K19.190Stable

CAL/AM WATER COMPANY - SAN MARINO48K33.780Watch

SAN LUIS OBISPO WATER DEPARTMENT48K14.396Stable

CERRITOS - CITY, WATER DEPT.47K33.780Watch

GOLDEN STATE WATER CO. - CORDOVA47K19.186Stable

CAMARILLO WATER DEPT47K19.190Stable