Watch Water Systems in California

412 community drinking-water systems in California currently rated Watch (MISI 21–40).

Systems in the Watch band (MISI 21–40) exhibit emerging stress indicators that warrant monitoring. One or more risk families may show moderate pressure — often early signs of capital deferral, revenue concentration, or demographic shifts affecting the customer base.

SystemPop. ServedMISIBand

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

EAST BAY MUD1.4M34.589Watch

SAN DIEGO, CITY OF1.4M22.936Watch

EASTERN MUNICIPAL WD667K22.605Watch

CITY OF FRESNO546K31.192Watch

CITY OF SACRAMENTO MAIN520K31.192Watch

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

ALAMEDA COUNTY WATER DISTRICT344K30.924Watch

CITY OF SANTA ANA311K36.713Watch

RIVERSIDE, CITY OF298K20.688Watch

SANTA CLARITA WATER DIVISION F294K29.414Watch

GSWC - SOUTHWEST278K29.414Watch

HELIX WATER DISTRICT278K26.682Watch

COACHELLA VWD: COVE COMMUNITY270K26.434Watch

CWS - BAKERSFIELD268K26.682Watch

SAN GABRIEL VALLEY WATER CO.-EL MONTE248K38.340Watch

OTAY WATER DISTRICT238K22.936Watch

MODESTO, CITY OF219K26.682Watch

SAN BERNARDINO CITY215K24.682Watch

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

ONTARIO MUNICIPAL UTILITIES COMPANY185K29.596Watch

SCWA - LAGUNA/VINEYARD185K35.608Watch

CALIFORNIA WATER SERVICE - STOCKTON176K20.688Watch

SANTA ROSA, CITY OF175K26.769Watch

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

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

CWS - VISALIA148K28.345Watch

RANCHO CALIFORNIA WATER DISTRICT146K26.434Watch

CALIFORNIA WATER SERVICE CO. - DOMINGUEZ144K29.414Watch

CITY OF FULLERTON139K36.713Watch

ESCONDIDO, CITY OF137K22.936Watch

VICTORVILLE WATER DISTRICT136K26.682Watch

VISTA IRRIGATION DISTRICT132K30.345Watch

EL DORADO ID - MAIN132K34.571Watch

CITY OF SANTA CLARA131K34.094Watch

CITY OF CLOVIS130K24.682Watch

PALMDALE WATER DIST.127K23.668Watch

CWSC SALINAS124K22.936Watch

CITY OF VALLEJO121K21.684Watch

CITY OF ORANGE121K29.097Watch

CITY OF FAIRFIELD120K27.613Watch

CITY OF ANTIOCH115K30.841Watch

CAL-WATER SERVICE CO.-CHICO115K31.392Watch

GOLDEN STATE WC - WEST ORANGE114K29.097Watch

VENTURA WATER DEPARTMENT114K30.428Watch

VALLECITOS WD114K30.635Watch

GREAT OAKS WC, INC.110K37.091Watch

AZUSA LIGHT AND WATER110K23.668Watch

MESA WATER DISTRICT110K29.097Watch

DOWNEY - CITY, WATER DEPT.109K28.665Watch

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

HESPERIA WD101K27.184Watch

SOUTH TAHOE PUD - MAIN100K29.331Watch

CITY OF SANTA BARBARA WATER DEPARTMENT99K26.434Watch

DUBLIN SAN RAMON SERVICES DISTRICT99K25.347Watch

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

TRACY, CITY OF97K20.193Watch

CARLSBAD MWD95K30.345Watch

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

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

CHINO HILLS, CITY OF76K22.347Watch

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

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

VALLEY COUNTY WATER DIST.69K22.667Watch

CITY OF NEWPORT BEACH69K25.351Watch

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

LAKEWOOD - CITY, WATER DEPT.66K23.668Watch

WATSONVILLE, CITY OF65K23.924Watch

CITY OF BRENTWOOD65K25.351Watch

APPLE VALLEY RANCHOS WC64K31.137Watch

CALIFORNIA WATER SERVICE-S SAN FRANCISCO64K26.919Watch

GSWC - FLORENCE/GRAHAM64K21.922Watch

PORTERVILLE, CITY OF63K30.116Watch

CITY OF LA HABRA63K29.014Watch

CITY OF PITTSBURG63K29.014Watch

MONTEREY PARK-CITY, WATER DEPT.62K30.848Watch

HANFORD, CITY OF62K20.784Watch

CITY OF WOODLAND61K22.710Watch

CALIFORNIA WATER SERVICE - BEAR GULCH61K21.918Watch

CALIFORNIA WATER SERVICE - LIVERMORE60K33.345Watch

CITY OF GILROY59K29.304Watch

SUBURBAN WATER SYSTEMS-LA MIRADA57K21.922Watch

CITY OF FOUNTAIN VALLEY57K37.298Watch

GSWC-SAN DIMAS57K29.414Watch

ALCO WATER SERVICE56K27.184Watch

MONTE VISTA CWD56K31.192Watch

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

GSWC - BELL, BELL GARDENS55K21.922Watch

CALAM - SUBURBAN55K24.682Watch

ROWLAND WATER DISTRICT55K29.414Watch

CERES, CITY OF55K33.779Watch

CITY OF WEST SACRAMENTO53K25.638Watch

LAKE HEMET MWD53K26.641Watch

YUCAIPA VALLEY WATER DISTRICT52K33.068Watch

EL TORO WATER DISTRICT52K25.351Watch

CITY OF SAN CLEMENTE52K25.351Watch

GOLDEN STATE WC - PLACENTIA50K29.097Watch

WHITTIER-CITY, WATER DEPT.50K28.825Watch

POWAY, CITY OF50K28.782Watch

UC - DAVIS50K34.657Watch

CITY OF BREA48K37.008Watch

CAL/AM WATER COMPANY - SAN MARINO48K33.780Watch

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

CITY OF LOS BANOS47K30.116Watch

CITY OF MORGAN HILL47K31.280Watch

COLTON, CITY OF47K31.113Watch

BELLFLOWER - SOMERSET MWC46K23.875Watch

CITY OF SAN JOSE - NSJ/ALVISO46K28.348Watch

OILDALE MWC45K29.072Watch

HAWTHORNE-CITY WATER DEPT.45K27.918Watch

ROHNERT PARK, CITY OF44K21.881Watch

DIABLO WATER DISTRICT43K25.351Watch

GSWC - NORWALK43K21.922Watch

CAMP PENDLETON (SOUTH)42K31.137Watch

CITY OF SAN BRUNO41K21.922Watch

SOUTH COAST WD - SOUTH COAST41K25.351Watch

SOQUEL CREEK WATER DISTRICT41K21.591Watch

PICO RIVERA - CITY, WATER DEPT.41K27.538Watch

LOMPOC-CITY WATER UTILITY DIV40K27.198Watch

SAN DIEGUITO WD40K23.143Watch

CALEXICO, CITY OF40K30.116Watch

BEVERLY HILLS-CITY, WATER DEPT.40K35.845Watch

ADELANTO, CITY OF40K33.113Watch

GSWC - CLAREMONT40K23.875Watch

CITY OF SAN JUAN CAPISTRANO40K29.304Watch

GSWC - CULVER CITY38K21.922Watch

MONROVIA-CITY, WATER DEPT.38K25.851Watch

RAMONA MUNICIPAL WD37K27.184Watch

RUBIDOUX COMMUNITY SD37K24.434Watch

ESTERO MUNICIPAL IMPROVEMENT DISTRICT37K25.871Watch

STANFORD UNIVERSITY36K22.350Watch

CRESCENTA VALLEY CWD36K29.916Watch

LAKESIDE WD36K28.865Watch

CALIFORNIA WATER SERVICE - SAN CARLOS35K21.918Watch

SAN JOSE STATE UNIVERSITY35K26.779Watch

GOLDEN STATE WATER COMPANY - ORCUTT34K21.125Watch

COVINA-CITY, WATER DEPT.33K30.582Watch

MANHATTAN BEACH-CITY, WATER DEPT.33K29.414Watch

EAST NILES CSD33K30.116Watch

LA VERNE, CITY WD31K21.918Watch

PASO ROBLES WATER DEPARTMENT31K20.193Watch

CITY OF MARTINEZ31K36.585Watch

SCWA MATHER-SUNRISE31K22.118Watch

RINCON DEL DIABLO MWD (ID-1)31K30.428Watch

ATASCADERO MUTUAL WATER CO31K21.192Watch

MID-PENINSULA WATER DISTRICT31K21.918Watch

CALIF STATE POLYTECHNICAL UNIV - POMONA30K31.800Watch