Water utilities serving California

Service area: Bellflower Service Area, Bellflower and vicinity, Los Angeles County; active CWS PWS CA1910018

Population: 5,999 people served by active PWS CA1910018 in the California SDWIS registry, with approximately 1,806 residential and 22 commercial metered connections. California American Water acquired the former City of Bellflower municipal system in 2022 and reports service to approximately 1,800 homes and businesses in the Bellflower system.

Service area: Los Angeles and the Los Angeles Department of Water and Power water-service territory, including certain Eastern Sierra service communities

Population: 3,856,043 people (EPA SDWIS PWS ID CA1910067; active community water system record for Los Angeles County)

Service area: City of San Diego and the City of San Diego Public Utilities water and wastewater service territory

Population: Approximately 1,400,000 residents according to the City’s FY2026 Public Utilities materials; California drinking-water registry PWS CA3710020 (SAN DIEGO, CITY OF) is an active community water system serving San Diego County

Service area: Greater San Jose metropolitan area, including portions of San Jose, Cupertino, Santa Clara, Campbell, Los Gatos, Monte Sereno, Saratoga, and contiguous Santa Clara County territory

Population: Over 1,000,000 people in the greater San Jose metropolitan area; California PWS CA4310011 is the active San Jose Water community water system record

Service area: San Francisco retail water and wastewater customers plus wholesale water service to Bay Area counties supplied by the San Francisco Regional Water System

Population: Approximately 2,700,000 people for active CWS PWS CA3810001, the San Francisco Regional Water System, according to California DWSRF system data; SFPUC provides retail service in San Francisco and wholesale water to three Bay Area counties

Service area: Oakland and the East Bay service territory in Alameda and Contra Costa counties; EBMUD wastewater service covers Alameda, Albany, Berkeley, El Cerrito, Emeryville, Kensington, Oakland, Piedmont, and parts of Richmond

Population: 1,442,800 people (EPA SDWIS PWS ID CA0110005, active Community Water System; the EBMUD wastewater system serves approximately 740,000 people)

Service area: Central and eastern Contra Costa County, including Concord, Martinez, Pleasant Hill, Walnut Creek, Pittsburg, Antioch, Brentwood, and neighboring communities served by the District’s treated-water system

Population: 198,000 people (California active CWS registry, PWS ID CA0710003; the District also reports wholesale and untreated-water relationships that serve additional communities through separate retail systems)

Service area: City of Fresno and numerous county-island areas within the City’s approximately 114-square-mile water service area

Population: Approximately 545,466 people (California active CWS record, PWS ID CA1010007; the City’s water division reports more than 142,200 residential, commercial, and industrial customer accounts)

Service area: City of Sacramento and designated Sacramento service areas

Population: Approximately 528,000 residents in the current California Drinking Water Watch annual operating-period record for active CWS CA3410020; other official State Water Board planning and largest-system documents report different snapshots, including approximately 433,400 and 884,060 depending on whether the dataset counts retail population, planning population, or broader service context. The system is clearly above the 3,300-person qualification threshold.

Service area: City of Anaheim and connected Anaheim Public Utilities water service areas

Population: 348,593 residents in the active California Drinking Water Watch annual operating-period record for CWS CA3010001; the system also reports approximately 55,081 residential and 7,207 commercial metered connections. The system is above the 3,300-person qualification threshold and is supplied primarily through treated Metropolitan Water District connections, with standby and local well sources listed by the State registry.

Service area: City of Irvine, portions of Lake Forest, Tustin, Orange, Newport Beach, Costa Mesa, and nearby unincorporated Orange County communities

Population: 444,800 residents in the current California Drinking Water Watch active-system record for CWS CA3010092. IRWD’s 2025 Urban Water Management Plan reports 132,347 active municipal connections for 2025, while the State registry identifies the district as an active community system with surface-water and groundwater supplies. The district is well above the 3,300-person threshold.

Service area: Rancho Santa Margarita, Mission Viejo, Ladera Ranch, Coto de Caza, Las Flores, Rancho Mission Viejo, San Juan Capistrano, Dove Canyon, and surrounding South Orange County communities

Population: Approximately 210,000 residents according to the District’s current rate-study and customer materials; older official operating-period records reported approximately 159,632–168,289 residents. Active California CWS CA3010101 is well above the 3,300-person qualification threshold and provides drinking water, wastewater, and recycled-water service across nine South Orange County communities.

Service area: City of Long Beach and the Long Beach Utilities Department potable-water, sewer, and reclaimed-water service territory in Los Angeles County

Population: 466,772 residents in the active California Drinking Water Watch operating-period record for CWS CA1910065, with approximately 81,194 residential and 6,677 commercial metered connections. The system is primarily supplied by Long Beach groundwater and treated Metropolitan Water District connections.

Service area: City of San Bernardino and the active municipal water-service territory served by the San Bernardino Municipal Water Department

Population: 214,665 residents in the active California Drinking Water Watch operating-period record for CWS CA3610039, with approximately 41,208 residential and 4,927 commercial metered connections. The system is groundwater-primary and is officially listed as active by the California State Water Resources Control Board.

Service area: City of Roseville and City of Roseville Environmental Utilities service territory in Placer County; excludes customers billed by Placer County Water Agency or San Juan Water District

Population: 155,612 residents in the active California Drinking Water Watch operating-period record for CWS CA3110008, with approximately 48,735 residential metered connections and 3,194 commercial metered connections. The system is surface-water-primary and is operated by the City of Roseville.

Service area: City of Santa Ana and municipal water-service areas in Orange County

Population: 310,539 residents in the active California Drinking Water Watch operating-period record for CWS CA3010038, with approximately 40,025 residential and 5,627 commercial metered connections. The system uses treated Metropolitan Water District/State Water Project supplies together with active and standby groundwater wells.

Service area: City of Stockton

Population: Approximately 183,046 residents, according to the compiled federal/state population record for active CWS CA3910012; California Drinking Water Watch identifies CITY OF STOCKTON as an active community water system in San Joaquin County.

Service area: City of Garden Grove

Population: 174,226 residents served by active CWS CA3010062, with 32,054 residential meter connections listed by California Drinking Water Watch; the registry identifies CITY OF GARDEN GROVE as an active community water system in Orange County.

Service area: Laguna Niguel, Aliso Viejo, Laguna Hills, Mission Viejo, Dana Point, and San Juan Capistrano service areas

Population: 170,236 residents served by active CWS CA3010073, with 49,471 residential meter connections listed by California Drinking Water Watch; the District’s current operations page describes a service area of approximately 37 square miles across six South Orange County communities.

Service area: City of Fullerton

Population: 139,461 residents served by active CWS CA3010010, with 28,634 residential meter connections listed by California Drinking Water Watch. The City’s current 2026 water-quality information reports approximately 140,541 residents and 5,549 businesses receiving Fullerton water service.

Service area: City of Huntington Beach

Population: 201,000 residents served by active CWS CA3010053, with 48,914 residential meter connections listed by California Drinking Water Watch; the registry identifies CITY OF HUNTINGTON BEACH as an active Orange County community water system.

Service area: City of Fountain Valley, Orange County

Population: 56,747 people served by active California community water system CA3010069, according to California Drinking Water Watch. The state registry lists approximately 15,814 residential, 1,009 commercial, and 248 industrial meters and identifies the City of Fountain Valley as the active community water system.

Service area: East Orange, North Tustin, and portions of unincorporated Orange County; Retail Zone RZ / PWS CA3010068

Population: 3,464 residential residents served by active California community water system CA3010068, according to California Drinking Water Watch. The registry lists 1,196 residential meter connections and 15 commercial connections; the East Orange County Water District as a whole serves a larger regional area, but this record is limited to the separately listed RZ system.

Service area: Yorba Linda and portions of Placentia, Brea, Anaheim, and unincorporated Orange County

Population: 84,292 residents served by active California community water system CA3010037, according to California Drinking Water Watch. The registry lists approximately 23,765 residential and 1,778 commercial meter connections; this record covers the YLWD community water system rather than the separate Golden State Water Company distribution systems in portions of the service area.

Service area: City of Brea, Orange County; PWS CA3010002

Population: 48,479 residents served by active California community water system CA3010002, according to California Drinking Water Watch. The state registry lists 11,299 residential, 1,352 commercial, and 259 industrial connections; the system also purchases water from regional and neighboring suppliers.

Service area: City of La Habra, Orange County; PWS CA3010018

Population: 63,118 residents served by active California community water system CA3010018, according to California Drinking Water Watch. The registry lists 11,836 residential and 1,146 commercial meter connections; the system uses City wells and purchased water from Metropolitan Water District, California Domestic Water Company, neighboring cities, and regional suppliers.

Service area: La Puente and portions of the La Puente Valley in Los Angeles County; PWS CA1910060

Population: 8,243 residents served by active California community water system CA1910060, according to California Drinking Water Watch. The District’s current public materials describe a service organization with more than 4,000 customer accounts and service coverage in La Puente Valley; the state registry population is used for the system-level estimate.

Service area: City of La Verne, Los Angeles County; active CWS CA1910062

Population: 31,334 residents served by active California community water system CA1910062, according to California Drinking Water Watch. The state registry also lists 7,939 residential, 723 commercial, 155 industrial, and 2 agricultural service connections. The system uses local groundwater wells blended with imported water purchased through Three Valleys Municipal Water District.

Service area: Golden State Water San Dimas Customer Service Area, including portions of Charter Oak, Covina, Glendora, La Verne, San Dimas, and Walnut; active CWS CA1910142

Population: 56,538 residents served by active California community water system CA1910142, according to California Drinking Water Watch. The state registry lists approximately 15,120 residential, 930 commercial, 112 agricultural, and 1 industrial connection. The system blends groundwater from the Main San Gabriel Basin with purchased water from Metropolitan Water District of Southern California, Three Valleys Municipal Water District, Walnut Valley Water District, and other documented connections.

Service area: Golden State Water Claremont Customer Service Area, including Claremont and portions of Montclair, Pomona, and Upland; active CWS CA1910024

Population: 39,730 residents served by active California community water system CA1910024, according to California Drinking Water Watch. The state registry lists approximately 10,414 residential, 589 commercial, 282 agricultural, and 10 industrial connections. The system’s active sources include purchased treated water from Three Valleys Municipal Water District and the City of Upland plus groundwater wells serving the Claremont area.

Service area: Golden State Water South San Gabriel Customer Service Area, including portions of Arcadia, El Monte, Irwindale, Monrovia, Monterey Park, Rosemead, San Gabriel, and Temple City; active CWS CA1910223

Population: 26,240 residents served by active California community water system CA1910223, according to California Drinking Water Watch. The state registry lists approximately 4,736 residential, 280 commercial, 26 agricultural, and 5 industrial connections. Active sources include a Metropolitan Water District treated connection and groundwater wells and treatment facilities identified as Garvey, San Gabriel, and Saxon.

Service area: California American Water East Pasadena Service Area, within and adjacent to Arcadia and Temple City and adjacent to Pasadena and San Gabriel, Los Angeles County; active CWS CA1910020

Population: 9,949 residents served by active California community water system CA1910020, according to California Drinking Water Watch. The state registry lists approximately 2,782 residential and 237 commercial connections. Active supply sources include City of Arcadia and City of Pasadena connections plus East Pasadena wells 09 and 11.

Service area: Duarte Service Area, including Bradbury, Duarte, portions of Irwindale and Monrovia, and vicinity

Population: 24,773 people served; the active California Drinking Water Watch record lists 6,817 residential, 619 commercial, 55 agricultural, and 16 industrial connections.

Service area: San Marino Service Area, including San Marino, Rosemead, portions of San Gabriel and Temple City, Adams Ranch, and vicinity

Population: 47,695 people served; the EPA/SDWA public-system listing identifies CA1910139 as an active community water system.

Service area: Baldwin Hills Service Area, including Baldwin Hills, Windsor Hills, View Park, Ladera Heights, and vicinity

Population: 20,724 people served; the active California Drinking Water Watch record lists 5,986 residential, 277 commercial, 13 agricultural, and 4 industrial connections.

Service area: Golden State Water Company Artesia System / Central Basin East Customer Service Area, including portions of Artesia, Cerritos, Downey, Hawaiian Gardens, La Mirada, Lakewood, Long Beach, Norwalk, Santa Fe Springs, and adjacent territory

Population: 50,415 people served; the active California Drinking Water Watch record lists 10,102 residential, 725 commercial, and 3 industrial metered connections.

Service area: Florence-Graham System / Central Basin West Customer Service Area, including Florence-Graham, Graham, Willowbrook, and adjacent South Los Angeles County territory

Population: 62,941 people served according to the public EPA/SDWA CWS listing; California Drinking Water Watch identifies CA1910077 as active, primary source purchased surface water.

Service area: Southwest Customer Service Area, including all of Gardena and Lawndale and portions of Carson, Compton, El Segundo, Hawthorne, Inglewood, Redondo Beach, and unincorporated Athens, Del Aire, El Camino Village, Lennox, and Gardena Heights

Population: 277,740 people served; the active California Drinking Water Watch record lists 47,724 residential, 4,830 commercial, and 90 industrial metered connections.

Service area: Norwalk System / Central Basin East Customer Service Area, including portions of Norwalk, Artesia, Cerritos, Downey, Hawaiian Gardens, La Mirada, Lakewood, Long Beach, Santa Fe Springs, Whittier, and adjacent territory

Population: 43,167 people served; the active California Drinking Water Watch record identifies CA1910098 as a community water system with primary source purchased surface water.

Service area: South Arcadia System, including portions of Temple City, Arcadia, El Monte, Irwindale, Monrovia, and adjacent unincorporated Los Angeles County

Population: 27,072 people served; the active California Drinking Water Watch record lists 7,344 residential, 276 commercial, 45 agricultural, and 1 industrial metered connection.

Service area: Hollydale System / Central Basin West Customer Service Area, principally Hollydale in South Gate and adjacent South Los Angeles County territory

Population: 76,443 people served; the California Drinking Water Watch service record lists 12,936 residential, 1,436 commercial, and 70 industrial metered connections.

Service area: Bell-Bell Gardens System, serving portions of Bell, Bell Gardens, and Cudahy in Los Angeles County

Population: 55,050 people served; the active California Drinking Water Watch record lists 6,660 residential, 825 commercial, and 4 industrial metered connections.

Service area: Culver City Customer Service Area

Population: 38,233 people; 7,877 residential, 1,433 commercial, and 67 industrial service connections reported for active PWS CA1910030

Service area: South San Francisco and vicinity, San Mateo County

Population: 62,609 people; 14,262 residential, 2,147 commercial, and 48 industrial service connections reported for active PWS CA4110009

Service area: San Carlos and vicinity, San Mateo County

Population: 34,801 people; 9,359 residential, 1,034 commercial, and 74 industrial service connections reported for active PWS CA4110007

Service area: San Mateo and vicinity, San Mateo County

Population: 103,536 people; 22,823 residential, 2,630 commercial, and 8 industrial service connections reported for active PWS CA4110008

Service area: Stockton and vicinity, San Joaquin County

Population: 176,266 people; 40,104 residential, 4,180 commercial, and 75 industrial service connections reported for active PWS CA3910001

Service area: East Los Angeles, Commerce, and vicinity, Los Angeles County

Population: 152,474 people; 21,210 residential, 4,904 commercial, and 101 industrial service connections reported for active PWS CA1910036

Service area: Livermore, Crane Ridge, and vicinity, Alameda County

Population: 60,414 people; 17,371 residential, 1,223 commercial, and 1 agricultural service connections reported for active PWS CA0110003

Service area: Portions of Carson, Los Angeles, Long Beach, Torrance, and vicinity, Los Angeles County

Population: 143,996 people; 29,955 residential, 3,055 commercial, and 140 industrial service connections reported for active PWS CA1910033

Service area: Hermosa Beach, Redondo Beach, and portions of Torrance

Population: 96,853 people; 24,665 residential service connections, 2,160 commercial connections, and 20 industrial connections according to California Drinking Water Watch for active system CA1910134.

Service area: Chico and Hamilton City, plus vicinity in Butte and Glenn Counties

Population: 114,925 people; 26,808 residential service connections, 3,566 commercial connections, and 22 industrial connections according to California Drinking Water Watch for active system CA0410002.

Service area: Bakersfield, City of Bakersfield, Olcese, and North Garden in Kern County

Population: 267,881 people; 58,818 residential service connections, 6,569 commercial connections, and 28 industrial connections according to California Drinking Water Watch for active system CA1510003. Cal Water also operates the City of Bakersfield water system under an operations-and-maintenance contract, while this record is the active CWS - Bakersfield public-water-system entry.

Service area: Visalia and Goshen, with district service areas including Fairway, Oak Ranch, Porterville, Tulare, Tulco, and related Tulare County systems

Population: 148,496 people; 43,622 residential service connections, 4,209 commercial connections, and 64 industrial connections according to California Drinking Water Watch for active system CA5410016.

Service area: Marysville service area within Yuba County, primarily the levee-protected City of Marysville area

Population: 12,419 people; 3,207 residential service connections, 512 commercial connections, and 2 industrial connections according to California Drinking Water Watch for active system CA5810001.

Service area: Oroville and vicinity in Butte County

Population: 11,106 people; 2,731 residential service connections, 780 commercial connections, and 17 industrial connections according to California Drinking Water Watch for active system CA0410005.

Service area: Palos Verdes Estates, Rolling Hills, Rolling Hills Estates, Lomita, Rancho Palos Verdes, San Pedro, and vicinity in Los Angeles County

Population: 71,452 people; 23,567 residential service connections and 926 commercial connections according to California Drinking Water Watch for active system CA1910104.

Service area: Atherton, Bear Gulch, Kings Mountain, Los Trancos, Portola Valley, Skyline, Woodside, and portions of Menlo Park and Redwood City

Population: 61,431 people; 17,353 residential service connections, 1,395 commercial connections, and 1 industrial connection according to California Drinking Water Watch for active system CA4110006.

Service area: Dixon and vicinity in Solano County

Population: 10,623 people; 2,876 residential service connections, 187 commercial connections, 3 industrial connections, and 1 agricultural connection according to California Drinking Water Watch for active system CA4810002.

Service area: Salinas, Bolsa Knolls, Buena Vista, Country Meadows, Foothill Estates, Indian Springs, Las Lomas, Las Palmas, Oak Hills, Salinas Hills, Toro Park, and Watsonville service areas in Monterey County

Population: 123,679 people; 21,260 residential service connections, 2,801 commercial connections, and 32 industrial connections according to California Drinking Water Watch for active system CA2710010.

Service area: Los Altos and portions of Cupertino, Los Altos Hills, Mountain View, and Sunnyvale in Santa Clara County

Population: 69,973 people; 17,170 residential service connections, 1,357 commercial connections, and 3 industrial connections according to California Drinking Water Watch for active system CA4310001.

Service area: San Jose Hills service area: portions of Covina, West Covina, Walnut, La Puente, Glendora, Hacienda Heights, and adjacent unincorporated Los Angeles County areas

Population: 248,000 people; 41,545 residential, 5,363 commercial, and 44 industrial service connections according to California Drinking Water Watch for active system CA1910205.

Service area: Whittier/La Mirada service area: portions of Whittier, La Mirada, Buena Park, La Habra, Compton, Willowbrook, and adjacent Los Angeles and Orange County areas

Population: 139,461 people; 28,634 residential, 2,439 commercial, 110 industrial, and 2 agricultural service connections according to California Drinking Water Watch for active system CA1910059.

Service area: Glendora and adjacent San Jose Hills service-area connections in Los Angeles County

Population: 5,249 people; 1,517 residential and 33 commercial service connections according to California Drinking Water Watch for active system CA1910046.

Service area: Sativa Water System in Compton and adjacent service connections in Los Angeles County

Population: 4,363 people; 1,321 residential and 1 commercial service connections according to California Drinking Water Watch for active system CA1910147.

Service area: Whittier system serving Whittier and adjacent portions of Hacienda Heights, La Habra Heights, and unincorporated Los Angeles County areas

Population: 66,045 people; 16,988 residential, 957 commercial, 127 agricultural, and 0 industrial service connections according to California Drinking Water Watch for active system CA1910174.

Service area: El Monte system and connected portions of Arcadia, Montebello, Pico Rivera, Santa Fe Springs, Whittier, and surrounding San Gabriel Valley communities

Population: 248,000 people; 41,545 residential, 5,363 commercial, and 44 industrial service connections according to California Drinking Water Watch for active system CA1910039.

Service area: Rowland Heights, Hacienda Heights, La Habra Heights, and adjacent portions of the Rowland Water District service area in Los Angeles County

Population: 56,100 people; 12,032 residential and 1,514 commercial service connections according to California Drinking Water Watch for active system CA1910194.

Service area: City of Whittier, California, municipal water service area

Population: 49,954 people; 10,811 residential, 1,047 commercial, 149 agricultural, and 30 industrial service connections according to California Drinking Water Watch for active system CA1910173.

Service area: La Habra Heights, most of the city, plus small portions of Whittier and unincorporated Los Angeles County

Population: Approximately 5,560 people across roughly 6 square miles and 1,983 meter connections according to the District's current service-area description; SDWIS lists 5,325 people for active system CA1910218.

Service area: Portions of Compton, Lynwood, Artesia, Bellflower, Norwalk, and Santa Fe Springs in Los Angeles County

Population: 26,371 people; 6,699 residential and 227 commercial service connections according to California Drinking Water Watch for active system CA1910021.

Service area: Whittier, East Whittier, and adjacent Orchard Dale Water District service area in Los Angeles County

Population: 25,000 people; 4,280 residential, 21 commercial, and 45 industrial service connections according to California Drinking Water Watch for active system CA1910101.

Service area: City of Compton, Los Angeles County; active PWS CA1910026

Population: 74,877 people served by active California community water system CA1910026 according to California Drinking Water Watch. The state registry lists 13,161 residential, 1,246 commercial, 139 industrial, and 16 agricultural metered connections; the City's current customer-service page describes approximately 80,000 people and nearly 14,500 connections, so both official figures are retained as a source-date variance.

Service area: Wholesale transmission and treatment system from El Monte through Industry, Whittier, La Habra Heights, La Habra, and Brea; active PWS CA1910199

Population: California Drinking Water Watch lists 290,814 people for active community water system CA1910199, with 20 commercial and 1 industrial listed service connection and no residential connections in the state registry. The Company's public 2023 regional description says its potable water is delivered through Suburban Water Systems, the City of La Habra, and the City of Brea to about 222,000 people; that figure describes downstream customers rather than a direct retail customer count. The Company's current operating profile is primarily wholesale, so both official population descriptions are retained with that distinction.

Service area: Santa Fe Springs, portions of Norwalk and Downey routes, Los Angeles County; active PWS CA1910245

Population: 19,219 people served by active California community water system CA1910245 according to California Drinking Water Watch. The state registry lists 3,416 residential and 2,749 commercial metered connections. The City's 2024 utility-billing procurement document describes approximately 3,000 residential accounts, 4,000 commercial accounts, and 7,200 active meters, reflecting the broader billing operation and route accounts; both official descriptions are retained.

Service area: Montebello 2 service area, including portions of Montebello and connections with California Water Service East Los Angeles, Montebello Land and Water, MWD, and SGV Water Company; active PWS CA1910117

Population: 7,330 people served by active California community water system CA1910117 according to California Drinking Water Watch. The state registry lists 1,228 residential, 295 commercial, and 1 industrial metered connection. The system's physical contact is listed at 3316 West Beverly Boulevard, Montebello, and its administrative contact is San Gabriel Valley Water Company in El Monte.

Service area: Montebello 1 service area, including portions of Montebello and adjacent Los Angeles County communities; active PWS CA1910189

Population: 9,349 people served by active community water system CA1910189. The available system listing identifies 3,446 residential and 486 commercial metered connections plus 16 industrial connections. The system is distinct from SGV Water's Montebello 2 PWS CA1910117, despite the shared company name and overlapping wholesale connections; the state registry identifies Montebello 1 as a purchased-groundwater system with local well and interconnection sources.

Service area: City of Industry Waterworks System service area, including portions of the City of Industry and the unincorporated Avocado Heights area in Los Angeles County; active PWS CA1910029

Population: 6,158 people served by active community water system CA1910029 according to California Drinking Water Watch. The registry lists approximately 1,506 residential connections, 330 commercial connections, one industrial connection, and 23 agricultural connections. The City owns the waterworks system and La Puente Valley County Water District maintains, operates, and manages it under the City's operating arrangement; this is separate from the City's electric IPU billing operation and from the other five water purveyors serving different Industry parcels.

Service area: Montebello Land & Water Company service territory in Montebello and adjoining Los Angeles County areas; active CWS PWS CA1910091

Population: 26,554 people served by active community water system CA1910091 according to California Drinking Water Watch. The registry lists 3,446 residential, 486 commercial, and 16 industrial metered connections. Montebello Land & Water is a shareholder-based mutual water company rather than a City of Montebello department; the City confirms that several separate water purveyors serve different Montebello parcels.

Service area: South Montebello Irrigation District service area in Montebello, Los Angeles County; active CWS PWS CA1910153

Population: 15,021 people served by active community water system CA1910153 according to California Drinking Water Watch. The registry lists 2,086 residential, 225 commercial, and 40 industrial metered connections. The system uses groundwater wells and purchases/interconnections with California Water Service East Los Angeles and Montebello Land & Water Company; it is separate from Montebello Land & Water and from the City/SGV Water Company system.

Service area: City of Monterey Park municipal water service area, Los Angeles County; active CWS PWS CA1910092

Population: 62,183 people served by active community water system CA1910092 according to California Drinking Water Watch. The registry lists 11,980 residential, 1,187 commercial, and 154 agricultural metered connections. The City says its water system serves more than 95% of Monterey Park residents and businesses; private water companies serve the remaining portions. The municipal system operates deep wells, treatment facilities, reservoirs, pumping stations, mains, and about 13,400 meters.

Service area: City of South Gate municipal water service area, Los Angeles County; active CWS PWS CA1910152

Population: 66,967 people served by active community water system CA1910152 according to the California SDWIS registry. The registry lists approximately 14,300 municipal connections and the City says the system serves most of South Gate; the Hollydale area is excluded because those customers are served by Golden State Water Company.

Service area: City of Glendora municipal water service area, Los Angeles County; active CWS PWS CA1910044

Population: 49,934 people served by active PWS CA1910044 according to California SDWIS, with approximately 13,195 residential and 816 commercial accounts/connections. The City Finance Department says it services approximately 13,000 water utility accounts.

Service area: City of Beverly Hills municipal water service area, Los Angeles County; active CWS PWS CA1910156

Population: 40,121 people served by active PWS CA1910156 according to California SDWIS, with approximately 1,644 commercial and 164 residential meter records in the registry. The system uses City facilities, groundwater wells, LADWP connections, and Metropolitan Water District treated-water connections.

Service area: City of Burbank municipal water service area, Los Angeles County; active CWS PWS CA1910179

Population: 105,603 people served by active PWS CA1910179 according to California SDWIS, with approximately 22,528 residential, 4,457 commercial, and 187 agricultural metered records. The system uses Burbank wells, Metropolitan Water District treated connections, and an emergency Glendale interconnection.

Service area: City of Glendale municipal water service area, Los Angeles County; active CWS PWS CA1910043

Population: 188,784 people served by active PWS CA1910043 according to California SDWIS, with approximately 31,907 residential, 4,100 commercial, and 67 industrial metered records. The system uses Glendale wells, Metropolitan treated-water connections, a Verdugo infiltration system, and a Burbank emergency connection.

Service area: San Gabriel County Water District service area in Rosemead, San Gabriel, Temple City, and adjacent Los Angeles County communities; active CWS PWS CA1910144

Population: 39,345 people served by active PWS CA1910144 according to California SDWIS, with approximately 8,683 residential and 830 commercial meter records. The District uses active groundwater wells and purchases/interconnections with Alhambra and California American Water San Marino.

Service area: Crescenta Valley service area in La Crescenta-Montrose and adjacent Los Angeles County communities; active CWS PWS CA1910028

Population: 35,841 people served by active PWS CA1910028 according to California SDWIS, with approximately 7,662 residential and 605 commercial metered records. The District uses groundwater wells, tunnel sources, purchased treated water, and emergency interconnections with Glendale, LADWP, and neighboring agencies.

Service area: City of Alhambra municipal water service area, Los Angeles County; active CWS PWS CA1910001

Population: The active City of Alhambra CWS serves the City of Alhambra and adjacent municipal service areas; the current SDWIS result confirms CA1910001 is active but the population field was not exposed in the retrieved page. The service area is comfortably above the requested 3,300-population threshold based on the City’s municipal customer base.

Service area: Pasadena municipal water service area, including Pasadena and portions of nearby communities; active CWS PWS CA1910124

Population: Approximately 169,868 people in the Pasadena Water and Power service area according to the City’s annual report materials. Active CWS PWS CA1910124 is listed by California SDWIS with physical water-department contact at 150 S. Los Robles Avenue and customer service at (626) 744-4005.

Service area: City of Pomona municipal water service area, Los Angeles County; active CWS PWS CA1910126

Population: 151,713 people served by active PWS CA1910126 according to California SDWIS, with approximately 26,624 residential, 3,307 commercial, and 241 industrial metered records. Pomona’s system uses groundwater wells, tunnel wells, treated imported water, and the Pedley filtration plant.

Service area: City of South Pasadena municipal water service area, Los Angeles County; active CWS PWS CA1910154

Population: 25,329 people served by active PWS CA1910154 according to California SDWIS, with approximately 5,676 residential and 471 commercial metered records. The City uses Graves and Wilson wells, Metropolitan treated water, and an interconnection with Pasadena Water and Power.

Service area: City of Arcadia municipal water and sewer service area, Los Angeles County; active CWS PWS CA1910003

Population: 51,361 people served by active PWS CA1910003 according to California SDWIS, with approximately 14,182 residential and 1,382 commercial metered records. The City states that it provides water and sewer service to more than 56,000 residents and businesses; the SDWIS population is the system-specific figure used here.

Service area: El Monte municipal water service area, including the central business district and parts of the northwestern and southern City

Population: 22,968 people served by active community water system PWS CA1910038 in the California SDWIS registry. The City’s Public Works description separately reports approximately 3,460 active services serving about 22,700 businesses and households within the City water system.

Service area: Bellflower and the Bellflower-Somerset service area

Population: Approximately 46,300 people; the active California SDWIS record lists approximately 6,014 residential, 1,022 commercial, and 67 agricultural service connections.

Service area: City of Redlands municipal water service area and connected portions of the Redlands community

Population: 78,025 people served by active CWS PWS CA3610037 in the California SDWIS registry. The system lists approximately 21,941 residential, 765 commercial, and 20 agricultural meter records, with additional unmetered commercial records.

Service area: City of Ontario municipal water service area in San Bernardino County

Population: 185,010 people served by active CWS PWS CA3610034 in the California SDWIS registry, with approximately 35,167 residential, 4,493 commercial, and 336 industrial metered service records.

Service area: Rancho Cucamonga, Upland, Fontana, Ontario, and adjacent San Bernardino County service areas served by the District

Population: 211,069 people served by active CWS PWS CA3610018 in the California SDWIS registry, with approximately 44,103 residential, 3,863 commercial, 472 industrial, and 5 agricultural meter records.

Service area: City of Chino municipal water service area in San Bernardino County

Population: 86,435 people served by active CWS PWS CA3610012 in the California SDWIS registry, with approximately 20,639 residential, 2,721 commercial, 10 industrial, and 3 agricultural meter records.

Service area: Chino Hills

Population: 76,414 people served by active PWS CA3610036; the SDWIS profile lists approximately 20,899 residential, 373 commercial, and 527 agricultural connections or accounts.

Service area: Highland and portions of San Bernardino City and San Bernardino County

Population: 108,600 residential population plus 86 transient population in active PWS CA3610064 according to California Drinking Water Watch; EVWD’s current public description rounds the service community to approximately 108,000 residents across a 30.1-square-mile area.

Service area: Central Rialto and the Rialto Utility Authority water-service area

Population: 54,453 residents served by active CWS CA3610038 according to California Drinking Water Watch, with approximately 10,966 residential and 1,030 commercial metered connections. The City warns that other Rialto parcels are served by West Valley Water District or Fontana Water Company, so the figure applies to the City of Rialto system rather than every city resident.

Service area: Fontana and portions of Rialto, Rancho Cucamonga, and nearby unincorporated San Bernardino County

Population: Approximately 237,700 people and roughly 47,000 service connections in the current 2026 SDWIS-derived public system presentation for active PWS CA3610041; the official state annual report previously recorded 228,140 permanent residents and identified the majority of Fontana plus portions of Rialto, Rancho Cucamonga, and San Bernardino County as the service area.

Service area: Bloomington, Colton, Fontana, Rialto, portions of unincorporated San Bernardino County, and Jurupa Valley in Riverside County

Population: 104,498 people and approximately 22,192 residential plus 1,244 commercial and industrial service connections in the current California Drinking Water Watch record for active PWS CA3610004. The District describes its broader service area as more than 100,000 customers across the listed Inland Empire communities.

Service area: Riverside and contiguous areas, including the majority of the City of Riverside and some unincorporated Riverside County areas

Population: Approximately 302,032 people associated with active CWS PWS CA3310031 in current public water-system data. Riverside Public Utilities’ 2024 financial report separately lists 66,570 water customers and a 316,690 overall utility service-area population; the exact population field on the state registry was not exposed during the native page fetch, so these figures are presented as system and service-area estimates rather than conflated.

Service area: Corona and the City’s water-service area in Riverside County

Population: 168,575 permanent residents served by active CWS PWS CA3310037 according to the California Drinking Water Watch record. The City describes its community as more than 160,000 residents and its water division as serving over 160,000 customers across approximately 45 square miles.

Service area: Western Riverside County and northern San Diego County, including retail service in Canyon Lake, Hemet, Menifee, Moreno Valley, Murrieta, Perris, San Jacinto, Temecula, and the unincorporated communities of French Valley, Good Hope, Homeland, Lakeview, Mead Valley, Murrieta Hot Springs, Nuevo, Romoland, Valle Vista, and Winchester

Population: 666,581 people for active California PWS CA3310009, the current annual residential population served reported by California Drinking Water Watch. EMWD separately describes its broader retail and wholesale water, wastewater, and recycled-water service area as nearly one million people across 682 square miles.

Service area: East County San Diego and South Bay communities served by the District, including Spring Valley, Bonita, Jamul, Rancho San Diego, eastern Chula Vista, Otay Mesa, and adjacent unincorporated areas

Population: 238,008 residents served by active California CWS PWS CA3710034, according to the California Drinking Water Watch operating-period record. The active system has approximately 47,956 residential and 2,840 commercial metered connections and is supplied primarily by treated imported water, including San Diego County Water Authority and other active interties.

Service area: East County San Diego, including El Cajon, La Mesa, Lemon Grove, Spring Valley, portions of Lakeside and Santee, and other unincorporated San Diego County neighborhoods

Population: 277,418 residents served by active California CWS PWS CA3710010 according to the California Drinking Water Watch record. Helix’s current public description rounds the broader service area to approximately 278,000–279,000 people, with approximately 52,218 residential and 4,380 commercial metered connections in the state registry.

Service area: Santee, El Cajon, Lakeside, Spring Valley, Harbison Canyon, Flinn Springs, and adjacent eastern San Diego County communities

Population: 93,859 people served by active California PWS CA3710037 in the current California Drinking Water Watch record, with approximately 21,960 residential and 1,393 commercial connections. Padre Dam purchases imported water from the San Diego County Water Authority and also receives supply from neighboring Helix Water District; its service area includes portions of Santee, El Cajon, Lakeside, Spring Valley, and unincorporated East County.

Service area: Most of Carlsbad, including the central and northern city service area; the southern portion is served by Olivenhain Municipal Water District or Vallecitos Water District

Population: 95,158 people served by active California PWS CA3710005 according to the State Water Resources Control Board system detail. The current state record lists 25,745 residential and 2,503 commercial connections; Carlsbad’s 2025 Urban Water Management Plan describes CMWD as a subsidiary district governed by the Carlsbad City Council and serving approximately 82 percent of the City of Carlsbad.

Service area: Oceanside and the surrounding City of Oceanside service area; the state system record also lists Vista in its broader service-area description

Population: 177,362 permanent population and approximately 43,890 connections in the City’s official electronic annual report; the current state registry and third-party estimates vary somewhat as service boundaries and reporting years change.

Service area: Santa Clara County, including wholesale water customers and groundwater-benefit zones throughout the county

Population: Approximately 1,540,360 people for active CWS PWS CA4310027 in the State Water Resources Control Board’s largest-system listing. Valley Water’s customer base is primarily wholesale retailers, agricultural users, and groundwater-benefit-zone users rather than direct household accounts.

Service area: Sonoma and Marin Counties through Sonoma Water’s wholesale transmission system and its eight primary retail water contractors

Population: More than 600,000 residents in Sonoma and Marin Counties through wholesale domestic-water supply and delivery; active CWS PWS CA4910020 is listed by California Drinking Water Watch as Sonoma County Water Agency.

Service area: City of Santa Rosa and the City’s municipal water and wastewater service territory in Sonoma County

Population: Approximately 173,000 residents; Santa Rosa Water reports more than 54,000 water accounts and more than 49,000 sanitary-sewer accounts. Active CWS PWS CA4910009 is listed by California Drinking Water Watch as SANTA ROSA, CITY OF.

Service area: Modesto and portions of Ceres, Del Rio, Empire, Grayson, Salida, and Turlock

Population: 218,771 people for PWS CA5010010 in the California State Water Board project data; the City separately reports more than 75,000 water-service connections and approximately 80,000 monthly utility-billing customers across water, sewer, storm-drain, and garbage services.

Service area: City of Tracy

Population: Approximately 96,609 people for PWS CA3910011 in current California water-system listings; the City describes its water service as reaching nearly 100,000 people who live, work, and visit Tracy, with more than 28,000 service connections and about 25,000 monthly utility bills.

Service area: City of Turlock

Population: Approximately 73,000 residents; the City’s surface-water integration page describes about 73,000 residents and 18 active groundwater wells, while the 2024 Census estimate for Turlock is 72,888.

Service area: City of Merced

Population: 98,030 people in the City’s 2025 Urban Water Management Plan service-area population table; the Water Division also describes service to more than 89,000 citizens, more than 25,000 water meters, and more than 25,000 service connections.

Service area: City of Manteca

Population: 84,928 people for active PWS CA3910005 in California Drinking Water Watch, with approximately 23,000 water connections reported by the City’s Utility Services page.

Service area: Lodi

Population: 68,272 people and 26,124 service connections, based on the active California Drinking Water Watch record for potable PWS CA3910004; the City’s water-meter page describes service to more than 67,000 people.

Service area: Galt

Population: 22,982 people for active potable PWS CA3410011; the City reports approximately 7,200 water accounts and all customers metered.

Service area: Gilroy

Population: 59,203 people and 15,701 active connections (14,179 residential, 1,403 commercial, and 119 institutional), based on the active California Drinking Water Watch record for PWS CA4310004.

Service area: Morgan Hill

Population: 47,374 people served by active PWS CA4310006, according to the current EPA/California Drinking Water Watch system record; the City’s Water Division separately reports approximately 12,900 residential, commercial, and industrial customers.

Service area: North San José/Alviso, Evergreen/Edenvale, and Coyote Valley service areas within San José

Population: Approximately 98,198 people served by active PWS CA4310020, as identified in the City’s current water-supply evaluation; the City’s 2020 Urban Water Management Plan reported 26,094 metered connections. Muni Water supplies roughly 12% of San José and serves North San José/Alviso, Evergreen/Edenvale, and Coyote Valley rather than the entire city.

Service area: Fremont, Newark, and Union City

Population: 344,000 people served by active CWS PWS CA0110001 in the current EPA SDWIS record; ACWD’s current fact sheet reports approximately 351,000 residents and 88,450 customer accounts across its 105-square-mile Tri-City service area.

Service area: Hayward, with a small northern area served by East Bay Municipal Utility District

Population: EPA/SDWIS active community water system CA0110006 lists approximately 162,954 people served, including 31,996 residential metered connections, 1,928 commercial meters, 1,231 industrial meters, and 1,486 agricultural meters. The City states that its system supplies more than 95% of Hayward; some northern properties receive EBMUD water.

Service area: Blossom Valley, Santa Teresa, Edenvale, Coyote Valley, and Almaden Valley areas of San Jose

Population: EPA SDWIS active CWS CA4310022 reports approximately 110,202 people served, including 110,088 residential and 114 non-residential population. The state inventory lists 20,626 residential metered connections, 724 commercial, 55 industrial, and 10 agricultural connections. Great Oaks’ own website describes the system as serving more than 20,000 customers in southeast San Jose.

Service area: City of Lincoln, Placer County

Population: Nearly 50,000 people who live, work, and visit Lincoln are served by the city’s water, wastewater, and solid-waste enterprise utilities; incorporated-city water accounts are billed by the municipal Utility Billing Division.

Service area: Elk Grove and surrounding Sacramento County water-service areas

Population: The district serves residents across Elk Grove and vicinity in Sacramento County; the reviewed 2026 pages do not publish a current SDWIS population or connection count.

Service area: City of Oxnard, Ventura County

Population: More than 200,000 residents and approximately 43,000 water service connections, including residential, commercial, industrial, institutional, agricultural, and recycled-water customers

Service area: City of San Bernardino and nearby SBMWD service-area communities, including the documented outside-city Loma Linda wastewater-treatment customer class

Population: More than 200,000 people across an approximately 45-square-mile water service area, with more than 45,000 water service connections and over 700 miles of water mains. Recent City planning material identifies approximately 210,830 people served by SBMWD in the 2020 service-population analysis.

Service area: Santa Clarita Valley, including Santa Clarita and Valencia legacy divisions

Population: 294,090 people (EPA SDWIS PWS ID CA1910240; 2026 active CWS record).

Service area: Southwest California service territory, including the GSWC Southwest system

Population: 277,740 people (EPA SDWIS PWS ID CA1910155; 2026 active CWS record).

Service area: San Francisco retail and regional wholesale water system

Population: 848,019 people (EPA SDWIS active CWS PWS CA3810011; SFPUC regional system serves additional wholesale customers)

Service area: Coachella Valley Cove Community

Population: 270,000 people (EPA SDWIS active CWS PWS CA3310001)

Service area: Lancaster, Palmdale, Pearblossom, Littlerock, Sun Village, Rock Creek, Lake Los Angeles, and northeast Los Angeles County

Population: 208,129 people (EPA SDWIS active CWS PWS CA1910070); District 40 reports approximately 234,000 people through about 60,000 metered connections.

Service area: Oxnard

Population: 200,232 people (EPA SDWIS active CWS PWS CA5610007); the City reports more than 200,000 residents and approximately 43,000 water accounts.

Service area: Sacramento suburban service areas, including Arden-Arcade, Carmichael, and portions of Citrus Heights and Sacramento County

Population: 194,444 people (EPA SDWIS active CWS PWS CA3410001)

Service area: National City, Bonita, and western/southwestern San Diego County service area

Population: 191,282 people (EPA SDWIS active CWS PWS CA3710025)

Service area: Southern and central Marin County

Population: 186,895 people (EPA SDWIS active CWS PWS CA2110002)

Service area: Laguna-Vineyard and South Sacramento County Zone 40 service area

Population: 184,896 people (EPA SDWIS active CWS PWS CA3410029); SCWA reports service to more than 55,000 homes and businesses across its broader retail and wholesale areas, with Laguna/Vineyard as its largest service area.

Service area: Oceanside

Population: 171,483 people (EPA SDWIS active CWS PWS CA3710014)

Service area: Lake Elsinore, Canyon Lake, Temescal Valley and Elsinore Valley

Population: 169,455 people (EPA SDWIS active CWS PWS CA3310012)

Service area: Bakersfield and contracted City of Bakersfield water service area

Population: 160,144 people (EPA SDWIS active CWS PWS CA1510031)

Service area: Sunnyvale, California

Population: 157,566 people (EPA SDWIS active CWS PWS CA4310014)

Service area: Temecula Valley and Rancho California Water District service area

Population: 146,147 people (EPA SDWIS active CWS PWS CA3310038)

Service area: Escondido, California

Population: 137,044 people (EPA SDWIS active CWS PWS CA3710006)

Service area: Victorville Water District / Victorville

Population: 135,983

Service area: Jurupa Valley and Eastvale

Population: 135,093

Service area: Vista and surrounding North County San Diego service area

Population: 132,430

Service area: El Dorado County and surrounding EID service area

Population: 132,171

Service area: Santa Clara

Population: 130,746

Service area: Victorville

Population: 135,983

Service area: Jurupa Valley and Eastvale

Population: 135,093

Service area: Vista and portions of San Marcos, Escondido, Oceanside, and unincorporated northern San Diego County

Population: 132,430

Service area: El Dorado County service area, including Placerville and El Dorado Hills

Population: 132,171

Service area: Santa Clara

Population: 130,746

Service area: Clovis

Population: 130,130

Service area: Palmdale Water District service area

Population: 126,804

Service area: Victorville and Victorville Water District service area

Population: 135,983

Service area: Jurupa Valley and Eastvale

Population: 135,093

Service area: Vista and surrounding North San Diego County irrigation-district service area

Population: 132,430

Service area: El Dorado County, including Cameron Park and Placerville-area service territory

Population: 132,171

Service area: Santa Clara

Population: 130,746

Service area: Vallejo

Population: 121,420

Service area: Orange

Population: 120,770

Service area: Fairfield

Population: 120,377

Service area: Antioch

Population: 115,074

Service area: Chico and Hamilton City

Population: 114,925

Service area: West Orange County / Orange County District service area

Population: 114,379

Service area: Vallecitos Water District service area, including San Marcos

Population: 113,500

Service area: Ventura

Population: 113,500

Service area: Downey

Population: 110,556

Service area: Blossom Valley, Santa Teresa, Edenvale, Coyote Valley and Almaden Valley areas of San Jose

Population: 110,088 in the EPA queue estimate; Great Oaks separately reports more than 20,000 customers

Service area: Azusa

Population: 110,044

Service area: Costa Mesa and Mesa Water District service area

Population: 110,000

Service area: Santa Maria

Population: 109,477

Service area: Highland and portions of San Bernardino city and county

Population: 108,629

Service area: Torrance and Torrance Municipal Water service area

Population: 106,183

Service area: Coronado, Imperial Beach and designated San Diego County service areas

Population: 106,000

Service area: Burbank

Population: 105,603

Service area: Daly City

Population: 104,901

Service area: Rialto, Bloomington, Fontana, Colton and other West Valley Water District service areas

Population: 104,498

Service area: San Mateo and the Cal Water Bayshore District

Population: 102,348

Service area: Walnut, Diamond Bar and surrounding Walnut Valley Water District service area

Population: 100,941

Service area: Hesperia

Population: 100,744

Service area: City of Santa Barbara

Population: 99,323 people (EPA SDWA active CWS queue estimate)

Service area: Hermosa Beach, Redondo Beach and portions of Torrance in the South Bay Region

Population: 96,853 people (EPA SDWA active CWS queue estimate; 2020 Cal Water plan reported 11,153 municipal connections)

Service area: Simi Valley and portions of unincorporated Ventura County served by Waterworks District No. 8

Population: 94,738; the District reports approximately 24,000 service connections and serves about 60% of Simi Valley, with 2026 planning materials describing more than 26,000 connections

Service area: City of Santa Cruz and selected unincorporated Santa Cruz County water-only areas

Population: 94,626

Service area: Redwood City and portions of San Carlos, Woodside, and unincorporated San Mateo County

Population: 92,819 people (EPA queue estimate for City of Redwood City public water system; the City reports more than 24,000 water customers across its service area)

Service area: Monterey County / Monterey District

Population: Approximately 92,450 people in the Monterey Community Water System queue

Service area: Westminster and Midway City

Population: 90,911

Service area: Santa Monica

Population: 89,947

Service area: Riverside County service areas including Murrieta, Rainbow, and Riverside districts

Population: 86,062 people

Service area: Manteca, San Joaquin County, California

Population: 84,928 people; the city reports approximately 23,000 water connections.

Service area: Napa, Napa County, California

Population: 84,804 people; the city says its municipal system serves more than 85,000 people in Napa and adjacent areas.

Service area: Indio, Coachella Valley, Riverside County, California

Population: 84,757 people

Service area: Goleta Valley, Santa Barbara County, California

Population: 84,462 people

Service area: Yorba Linda, Placentia, Brea, Anaheim, and adjacent Orange County areas

Population: 84,292 people

Service area: Buena Park, Orange County, California

Population: 81,998 people

Service area: Milpitas, Santa Clara County, California

Population: 81,773 people

Service area: Mountain View, Santa Clara County, California

Population: 81,501 people

Service area: Upland

Population: 78,376 people (EPA CWS estimate for City of Upland)

Service area: Redlands and City-managed municipal utility service areas

Population: 78,025 people (EPA CWS estimate for Redlands City MUD-Water Division)

Service area: Pleasanton

Population: 76,689 people (EPA SDWA system estimate)

Service area: South Gate

Population: 76,443 people (EPA SDWA system estimate; the City states its water division serves over 96,000 residents across its service area)

Service area: Chino Hills

Population: 76,414 people (EPA SDWA system estimate)

Service area: Compton

Population: 74,877 people in the EPA queue; Compton's official Water Services page describes approximately 80,000 people and 14,500 residential, commercial, and industrial connections, covering about 80% of the city.

Service area: Palm Springs, Cathedral City, and western Coachella Valley service area

Population: 74,807 people served according to the EPA queue; DWA provides retail water in Palm Springs, Cathedral City, and surrounding western Coachella Valley areas, with wastewater charges applying in portions of the service area.

Service area: Turlock

Population: Approximately 72,682 people in the EPA-listed City of Turlock community-water-system service area.

Service area: Bellflower and Norwalk, with portions of Artesia, Compton, Lynwood, and Santa Fe Springs

Population: 72,624 people, using the EPA queue estimate for CWS CA1910211; the official system materials identify the Bellflower/Norwalk service territory and its Los Angeles County residential customers.

Service area: Agoura Hills, Calabasas, Hidden Hills, Westlake Village, and surrounding Las Virgenes Valley communities

Population: 72,602 people, using the EPA queue estimate for CWS CA1910225; LVMWD's retail service area is the west San Fernando Valley and eastern Conejo Valley region.

Service area: Tulare

Population: Approximately 72,241 residents in the queue estimate; the City operates municipal water and sewer service for Tulare and related utility services.

Service area: Yuba City municipal water and wastewater service area

Population: 70,256 people (EPA SDWIS queue estimate for CA5110002)

Service area: Baldwin Park, Irwindale and surrounding Valley County Water District service area

Population: 68,871 people (EPA SDWIS queue estimate for CA1910009)

Service area: City of Newport Beach municipal potable-water and sewer service area

Population: 68,572 people (EPA SDWIS queue estimate for CA3010023)

Service area: Citrus Heights, Fair Oaks, Orangevale, Carmichael and portions of Roseville served by CHWD

Population: 67,818 people (EPA SDWA queue estimate for CA3410006; CHWD reports more than 20,000 service connections)

Service area: City of Davis municipal water, wastewater, storm drainage and utility-billing service area

Population: 67,457 people (EPA SDWA queue estimate for CA5710001)

Service area: City of Palo Alto municipal water, wastewater and full utility service area

Population: 67,231 people (EPA SDWA queue estimate for CA4310009)

Service area: City of Lynwood municipal water service area

Population: 66,967 people (EPA SDWA queue estimate for CA1910079)

Service area: Beaumont, Cherry Valley and surrounding BCVWD service area

Population: 66,841 people (EPA SDWA queue estimate for CA3310002)

Service area: Las Posas / Thousand Oaks area, Ventura County

Population: 66,809 people (California SDWA record for CA5610040; the system is identified in the State record as Las Posas/Thousand Oaks, Ventura County)

Service area: City of Tustin municipal water service area

Population: 66,600 people (EPA SDWA queue estimate for CA3010046)

Service area: City of Madera

Population: 66,560 people (EPA SDWA queue estimate for CA2010002)

Service area: City of Lakewood

Population: 66,135 people (EPA SDWA queue estimate for CA1910239)

Service area: City of Watsonville

Population: 65,231 people (EPA SDWA queue estimate for CA4410011)

Service area: City of Brentwood

Population: 64,513 people (EPA SDWA queue estimate for CA0710004)

Service area: Apple Valley Ranchos service area, San Bernardino County

Population: 64,469 people (EPA SDWA queue estimate for CA3610003)

Service area: City of Porterville

Population: 63,487 people (EPA SDWA queue estimate for CA5410010)

Service area: City of Hanford

Population: 62,127 people (EPA SDWA queue estimate for CA1610003)

Service area: North Marin Water District service area

Population: 61,691 people (EPA SDWA queue estimate for CA2110003)

Service area: City of Woodland

Population: 61,462 people (EPA SDWA queue estimate for CA5710006)

Service area: City of Petaluma

Population: 60,781 people (EPA SDWA queue estimate for CA4910006)

Service area: Alco Water Service area

Population: 56,253 people (EPA SDWA queue estimate for CA2710001)

Service area: Monte Vista Water District service area

Population: 56,017 people (EPA SDWA queue estimate for CA3610029)

Service area: City of Paramount

Population: 55,200 people (EPA SDWA queue estimate for CA1910105)

Service area: Bell and Bell Gardens service area

Population: 55,050 people (EPA SDWA queue estimate for CA1910011)

Service area: City of Lincoln

Population: 54,538 people (EPA SDWA queue estimate for CA3110004)

Service area: City of Ceres

Population: 54,513 people (EPA SDWA queue estimate for CA5010028)

Service area: City of West Sacramento

Population: 53,355 people (EPA SDWA queue estimate for CA5710003)

Service area: City of Thousand Oaks

Population: 53,157 people (EPA SDWA queue estimate for CA5610020)

Service area: Lake Hemet Municipal Water District service area

Population: 52,913 people (EPA SDWA queue estimate for CA3310022)

Service area: Yucaipa Valley Water District service area

Population: 52,010 people (EPA SDWA queue estimate for CA3610055)

Service area: El Toro Water District service area

Population: 51,800 people (EPA SDWA queue estimate for CA3010079)

Service area: City of San Clemente

Population: 51,545 people (EPA SDWA queue estimate for CA3010036)

Service area: City of Delano

Population: 51,428 people (EPA SDWA queue estimate for CA1510005)

Service area: California American Water Parkway District

Population: 50,573 people (EPA SDWA queue estimate for CA3410017)

Service area: Artesia/Central Basin East service area

Population: 50,415 people (EPA SDWA queue estimate for CA1910004)

Service area: Placentia/Yorba Linda service areas

Population: 50,381 people (EPA SDWA queue estimate for CA3010035)

Service area: Poway

Population: 49,888 people (EPA SDWA queue estimate for CA3710015)

Service area: University of California, Davis campus

Population: 49,616 people (EPA SDWA queue estimate for CA5710009)

Service area: Antelope Valley service area, including Lancaster and nearby communities

Population: 35,534 people (EPA SDWA queue estimate for CA3410031)

Service area: Moorpark and the Ventura County Waterworks District No. 1 service area

Population: 35,514 people (EPA SDWA queue estimate for CA5610018)

Service area: Lakeside and surrounding unincorporated East County San Diego service area

Population: 35,500 people (EPA SDWA queue estimate for CA3710013)

Service area: Fallbrook Public Utility District service area

Population: 35,237 people (EPA SDWA queue estimate for CA3710008)

Service area: Lathrop

Population: 35,080 people (EPA SDWA queue estimate for CA3910015)

Service area: Orcutt and surrounding Santa Maria Customer Service Area

Population: 34,102 people (EPA SDWA queue estimate for CA4210016)

Service area: Hemet

Population: 33,828 people (EPA SDWA queue estimate for CA3310016)

Service area: Covina

Population: 33,300 people (EPA SDWA queue estimate for CA1910127)

Service area: Camrosa Water District service area, Camarillo and Santa Rosa Valley

Population: 32,700 people (EPA SDWA queue estimate for CA5610063)

Service area: Manhattan Beach

Population: 32,697 people (EPA SDWA queue estimate for CA1910083)

Service area: Barstow

Population: 32,547 people (EPA SDWA queue estimate for CA3610043)

Service area: East Niles Community Services District service area, Bakersfield

Population: 32,517 people (EPA SDWA queue estimate for CA1510006)

Service area: Malibu portions of Los Angeles County Waterworks Districts 29 and 80

Population: 32,348 people (EPA SDWA queue estimate for CA1910204)

Service area: Banning

Population: 31,680 people (EPA SDWA queue estimate for CA3310006)

Service area: Burlingame

Population: 31,451 people (EPA SDWA queue estimate for CA4110003)

Service area: Paso Robles

Population: 31,176 people (EPA SDWA queue estimate for CA4010007)

Service area: Santa Paula

Population: 31,018 people (EPA SDWA queue estimate for CA5610011)

Service area: Martinez

Population: 30,997 people (EPA SDWA queue estimate for CA0710006)

Service area: Mather-Sunrise / Sacramento County Water Agency North Service Area

Population: 30,825 people (EPA SDWA queue estimate for CA3410704)

Service area: Escondido and surrounding San Diego County service area

Population: 30,757 people (EPA SDWA queue estimate for CA3710018)

Service area: Atascadero

Population: 30,618 people (EPA SDWA queue estimate for CA4010002)

Service area: Belmont and western San Mateo County

Population: 30,609 people (EPA SDWA queue estimate for CA4110001)

Service area: Valley Center

Population: 29,938 people (EPA SDWA queue estimate for CA3710026)

Service area: San Juan Water District service area

Population: 29,598 people (EPA SDWA queue estimate for CA3410021)

Service area: East Palo Alto

Population: 29,519 people (EPA SDWA queue estimate for CA4110024)

Service area: Atwater

Population: 29,479 people (EPA SDWA queue estimate for CA2410001)

Service area: Suisun City and Solano County

Population: 29,105 people (EPA SDWA queue estimate for CA4810005)

Service area: Pechanga Tribal service area

Population: 29,100 people (EPA SDWA queue estimate for 090605013)

Service area: Vernon

Population: 28,112 people (EPA SDWA queue estimate for CA1910167)

Service area: Auburn / Bowman

Population: 27,294 people (EPA SDWA queue estimate for CA3110005)

Service area: Dinuba

Population: 27,281 people (EPA SDWIS 2026Q2 estimate for CA5410002)

Service area: Lemoore

Population: 27,185 people (EPA SDWIS 2026Q2 estimate for CA1610005)

Service area: Benicia

Population: 27,131 people (EPA SDWIS 2026Q2 estimate for CA4810001)

Service area: Eureka

Population: 27,078 people (EPA SDWIS 2026Q2 estimate for CA1210004)

Service area: Brawley

Population: 26,862 people (EPA SDWIS 2026Q2 estimate for CA1310001)

Service area: Selma / San Jose service area

Population: 26,517 people (EPA SDWIS 2026Q2 estimate for CA1010024)

Service area: Yucca Valley / Hi-Desert

Population: 26,411 people (EPA SDWIS 2026Q2 estimate for CA3610073)

Service area: Sanger

Population: 26,357 people (EPA SDWIS 2026Q2 estimate for CA1010029)

Service area: Big Bear Lake

Population: 26,132 people (EPA SDWIS 2026Q2 estimate for CA3610044)

Service area: Reedley

Population: 26,076 people (EPA SDWIS 2026Q2 estimate for CA1010027)

Service area: Hollister

Population: 26,017 people (EPA SDWIS 2026Q2 estimate for CA3510001)

Service area: Windsor

Population: 25,561 people (EPA SDWIS 2026Q2 estimate for CA4910017)

Service area: Pasadena / Sunny Slope

Population: 25,253 people (EPA SDWIS 2026Q2 estimate for CA1910157)

Service area: Loma Linda

Population: 25,129 people (EPA SDWIS 2026Q2 estimate for CA3610013)

Service area: Norco

Population: 25,068 people (EPA SDWIS 2026Q2 estimate for CA3310025)

Service area: Patterson

Population: 24,977 people (EPA SDWIS 2026Q2 estimate for CA5010017)

Service area: Hollister

Population: 24,954 people (EPA SDWIS 2026Q2 estimate for CA3510003)

Service area: Mountain House

Population: 24,948 people (EPA SDWIS 2026Q2 estimate for CA3910027)

Service area: Seal Beach

Population: 24,937 people (EPA SDWIS 2026Q2 estimate for CA3010041)

Service area: Riverbank

Population: 24,834 people (EPA SDWIS 2026Q2 estimate for CA5010018)

Service area: Lynwood / Downey

Population: 24,701 people (EPA SDWIS 2026Q2 estimate for CA1910161)

Service area: Phelan / Pinon Hills

Population: 24,285 people (EPA SDWIS 2026Q2 estimate for CA3610120)

Service area: San Fernando

Population: 23,946 people (EPA SDWIS 2026Q2 estimate for CA1910143)

Service area: Bay Point

Population: 23,731 people (EPA SDWIS 2026Q2 estimate for CA0710002)

Service area: Rainbow / Fallbrook

Population: 23,536 people (EPA SDWIS 2026Q2 estimate for CA3710016)

Service area: Oakdale

Population: 23,235 people (EPA SDWIS 2026Q2 estimate for CA5010014)

Service area: Valley of the Moon / El Verano

Population: 23,107 people (EPA SDWIS 2026Q2 estimate for CA4910013)

Service area: Corcoran

Population: 22,808 people (EPA SDWIS 2026Q2 estimate for CA1610004)

Service area: Millbrae

Population: 22,795 people (EPA SDWIS 2026Q2 estimate for CA4110018)

Service area: North Garden / San Jose

Population: 22,762 people (EPA SDWIS 2026Q2 estimate for CA1510055)

Service area: Wasco

Population: 22,757 people (EPA SDWIS 2026Q2 estimate for CA1510021)

Service area: Miners Ranch / Oroville

Population: 22,664 people (EPA SDWIS 2026Q2 estimate for CA0410006)

Service area: Menlo Park

Population: 22,362 people (EPA SDWIS 2026Q2 estimate for CA4110017)

Service area: Pico Rivera

Population: 22,051 people (EPA SDWIS 2026Q2 estimate for CA1910125)

Service area: Temescal Valley

Population: 21,971 people (EPA SDWIS 2026Q2 estimate for CA3310074)

Service area: Shafter

Population: 21,915 people (EPA SDWIS 2026Q2 estimate for CA1510019)

Service area: Linda / Marysville

Population: 21,654 people (EPA SDWIS 2026Q2 estimate for CA5810002)

Service area: Imperial

Population: 21,591 people (EPA SDWIS 2026Q2 estimate for CA1310006)

Service area: Rancho Santa Fe

Population: 21,578 people (EPA SDWIS 2026Q2 estimate for CA3710023)

Service area: American Canyon

Population: 21,437 people (EPA SDWIS 2026Q2 estimate for CA2810005)

Service area: Port Hueneme

Population: 21,407 people (EPA SDWIS 2026Q2 estimate for CA5610009)

Service area: San Lorenzo Valley

Population: 21,145 people (EPA SDWIS 2026Q2 estimate for CA4410014)

Service area: Arcata

Population: 20,875 people (EPA SDWIS 2026Q2 estimate for CA1210001)

Service area: Baldwin Hills / Rosemead

Population: 20,724 people (EPA SDWIS 2026Q2 estimate for CA1910052)

Service area: Taft / West Kern

Population: 20,500 people (EPA SDWIS 2026Q2 estimate for CA1510022)

Service area: Norwalk

Population: 20,283 people (EPA SDWIS 2026Q2 estimate for CA1910191)

Service area: Lomita

Population: 20,256 people (EPA SDWIS 2026Q2 estimate for CA1910073)

Service area: Grand Terrace

Population: 20,188 people (EPA SDWIS 2026Q2 estimate for CA3610057)

Service area: Cutten / Humboldt County

Population: 19,807 people (EPA SDWIS 2026Q2 estimate for CA1210009)

Service area: Arvin

Population: 19,669 people (EPA SDWIS 2026Q2 estimate for CA1510001)

Service area: San Jose / Westlake

Population: 19,533 people (EPA SDWIS 2026Q2 estimate for CA5610016)

Service area: Soledad

Population: 19,455 people (EPA SDWIS 2026Q2 estimate for CA2710011)

Service area: Quartz Hill

Population: 19,100 people (EPA SDWIS 2026Q2 estimate for CA1910130)

Service area: Lamont

Population: 19,057 people (EPA SDWIS 2026Q2 estimate for CA1510012)

Service area: Greenfield

Population: 18,967 people (EPA SDWIS 2026Q2 estimate for CA2710008)

Service area: San Jacinto

Population: 18,950 people (EPA SDWIS 2026Q2 estimate for CA3310032)

Service area: Half Moon Bay

Population: 18,940 people (EPA SDWIS 2026Q2 estimate for CA4110011)

Service area: Twentynine Palms

Population: 18,795 people (EPA SDWIS 2026Q2 estimate for CA3610049)

Service area: Bella Vista

Population: 18,612 people (EPA SDWIS 2026Q2 estimate for CA4510014)

Service area: Sausalito

Population: 18,447 people (EPA SDWIS 2026Q2 estimate for CA2110350)

Service area: Laguna Beach

Population: 18,404 people (EPA SDWIS 2026Q2 estimate for CA3010017)

Service area: San Jose

Population: 18,111 people (EPA SDWIS 2026Q2 estimate for CA4810701)

Service area: Arroyo Grande

Population: 17,963 people (EPA SDWIS 2026Q2 estimate for CA4010001)

Service area: Jurupa Valley and Eastvale

Population: 135093 people (EPA SDWIS 2026Q2 active CWS estimate for CA3310021)

Service area: PLACERVILLE

Population: 132171 people (EPA SDWIS 2026Q2 active CWS estimate for CA0910001)

Service area: CLOVIS

Population: 130130 people (EPA SDWIS 2026Q2 active CWS estimate for CA1010003)

Service area: ORANGE

Population: 120770 people (EPA SDWIS 2026Q2 active CWS estimate for CA3010027)

Service area: FAIRFIELD

Population: 120377 people (EPA SDWIS 2026Q2 active CWS estimate for CA4810003)

Service area: ANAHEIM

Population: 114379 people (EPA SDWIS 2026Q2 active CWS estimate for CA3010022)

Service area: San Marcos and surrounding Vallecitos Water District service area

Population: Approximately 113,500 people served by Vallecitos Water District.

Service area: Ventura

Population: Approximately 113,500 people served by the Ventura Water Department system.

Service area: Downey

Population: Approximately 110,556 people served by the City of Downey Water Division.

Service area: Azusa

Population: Approximately 110,044 people served by Azusa Light & Water.

Service area: San Bernardino Valley regional wholesale service area in San Bernardino County; water is delivered through retail agencies serving communities including San Bernardino, Colton, Fontana, Highland, Loma Linda, Redlands, Rialto, Yucaipa, and surrounding areas.

Population: 109,608 people in the active California CWS record CA3610019; the district is a regional wholesaler and reports that its imported and managed supplies support 15 retail water agencies across a 353-square-mile service area.

Service area: TORRANCE

Population: 106183 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910213)

Service area: IMPERIAL BEACH

Population: 106000 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710001)

Service area: HESPERIA

Population: 100744 people (EPA SDWIS 2026Q2 active CWS estimate for CA3610024)

Service area: SOUTH LAKE TAHOE

Population: 100000 people (EPA SDWIS 2026Q2 active CWS estimate for CA0910002)

Service area: ELMIRA

Population: 99650 people (EPA SDWIS 2026Q2 active CWS estimate for CA4810008)

Service area: SANTA BARBARA

Population: 99323 people (EPA SDWIS 2026Q2 active CWS estimate for CA4210010)

Service area: PLEASANTON

Population: 98776 people (EPA SDWIS 2026Q2 active CWS estimate for CA0110009)

Service area: SIMI VALLEY

Population: 94738 people (EPA SDWIS 2026Q2 active CWS estimate for CA5610023)

Service area: SANTA CRUZ

Population: 94626 people (EPA SDWIS 2026Q2 active CWS estimate for CA4410010)

Service area: MERCED

Population: 93692 people (EPA SDWIS 2026Q2 active CWS estimate for CA2410009)

Service area: PACIFIC GROVE

Population: 92450 people (EPA SDWIS 2026Q2 active CWS estimate for CA2710004)

Service area: LOS ANGELES

Population: 89947 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910146)

Service area: REDDING

Population: 89628 people (EPA SDWIS 2026Q2 active CWS estimate for CA4510005)

Service area: AUBURN

Population: 89544 people (EPA SDWIS 2026Q2 active CWS estimate for CA3110025)

Service area: ENCINITAS

Population: 86458 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710029)

Service area: RIVERSIDE

Population: 86062 people (EPA SDWIS 2026Q2 active CWS estimate for CA3310049)

Service area: NAPA

Population: 84804 people (EPA SDWIS 2026Q2 active CWS estimate for CA2810003)

Service area: FOLSOM

Population: 80969 people (EPA SDWIS 2026Q2 active CWS estimate for CA3410014)

Service area: INGLEWOOD

Population: 80824 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910051)

Service area: UPLAND

Population: 78376 people (EPA SDWIS 2026Q2 active CWS estimate for CA3610050)

Service area: TURLOCK

Population: 72682 people (EPA SDWIS 2026Q2 active CWS estimate for CA5010019)

Service area: TULARE

Population: 72241 people (EPA SDWIS 2026Q2 active CWS estimate for CA5410015)

Service area: SACRAMENTO

Population: 54793 people (EPA SDWIS 2026Q2 active CWS estimate for CA3410010)

Service area: SACRAMENTO

Population: 48094 people (EPA SDWIS 2026Q2 active CWS estimate for CA3410013)

Service area: SAN LUIS OBISPO

Population: 47788 people (EPA SDWIS 2026Q2 active CWS estimate for CA4010009)

Service area: CERRITOS

Population: 47475 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910019)

Service area: LOS BANOS

Population: 47419 people (EPA SDWIS 2026Q2 active CWS estimate for CA2410005)

Service area: RANCHO CORDOVA

Population: 47161 people (EPA SDWIS 2026Q2 active CWS estimate for CA3410015)

Service area: CAMARILLO

Population: 46824 people (EPA SDWIS 2026Q2 active CWS estimate for CA5610019)

Service area: COLTON

Population: 46525 people (EPA SDWIS 2026Q2 active CWS estimate for CA3610014)

Service area: BELLFLOWER

Population: 46300 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910013)

Service area: SAN JOSE

Population: 45559 people (EPA SDWIS 2026Q2 active CWS estimate for CA4310019)

Service area: RANCHO CORDOVA

Population: 45128 people (EPA SDWIS 2026Q2 active CWS estimate for CA5610059)

Service area: BAKERSFIELD

Population: 44899 people (EPA SDWIS 2026Q2 active CWS estimate for CA1510015)

Service area: SAN JOSE

Population: 44718 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910047)

Service area: ROHNERT PARK

Population: 43821 people (EPA SDWIS 2026Q2 active CWS estimate for CA4910014)

Service area: EL CENTRO

Population: 43772 people (EPA SDWIS 2026Q2 active CWS estimate for CA1310004)

Service area: COACHELLA

Population: 43590 people (EPA SDWIS 2026Q2 active CWS estimate for CA3310007)

Service area: DESERT HOT SPRINGS

Population: 43484 people (EPA SDWIS 2026Q2 active CWS estimate for CA3310008)

Service area: OAKLEY

Population: 43357 people (EPA SDWIS 2026Q2 active CWS estimate for CA0710007)

Service area: SAN BRUNO

Population: 42631 people (EPA SDWIS 2026Q2 active CWS estimate for CA4110023)

Service area: CAMP PENDLETON

Population: 42219 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710702)

Service area: RIDGECREST

Population: 41580 people (EPA SDWIS 2026Q2 active CWS estimate for CA1510017)

Service area: CARMICHAEL

Population: 41193 people (EPA SDWIS 2026Q2 active CWS estimate for CA3410004)

Service area: LAGUNA BEACH

Population: 41118 people (EPA SDWIS 2026Q2 active CWS estimate for CA3010042)

Service area: FRESNO

Population: 41000 people (EPA SDWIS 2026Q2 active CWS estimate for CA1010339)

Service area: SOQUEL

Population: 40809 people (EPA SDWIS 2026Q2 active CWS estimate for CA4410017)

Service area: PICO RIVERA

Population: 40600 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910042)

Service area: LOMPOC

Population: 40473 people (EPA SDWIS 2026Q2 active CWS estimate for CA4210006)

Service area: ENCINITAS

Population: 40405 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710021)

Service area: CALEXICO

Population: 40357 people (EPA SDWIS 2026Q2 active CWS estimate for CA1310002)

Service area: ADELANTO

Population: 39930 people (EPA SDWIS 2026Q2 active CWS estimate for CA3610001)

Service area: LIVERMORE

Population: 38892 people (EPA SDWIS 2026Q2 active CWS estimate for CA0110011)

Service area: PACIFICA

Population: 38546 people (EPA SDWIS 2026Q2 active CWS estimate for CA4110025)

Service area: MARINA

Population: 38377 people (EPA SDWIS 2026Q2 active CWS estimate for CA2710017)

Service area: LEBEC

Population: 38125 people (EPA SDWIS 2026Q2 active CWS estimate for CA1503341)

Service area: MONROVIA

Population: 37931 people (EPA SDWIS 2026Q2 active CWS estimate for CA1910090)

Service area: BAKERSFIELD

Population: 37189 people (EPA SDWIS 2026Q2 active CWS estimate for CA1510029)

Service area: RAMONA

Population: 37047 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710019)

Service area: SAN DIEGO

Population: 36990 people (EPA SDWIS 2026Q2 active CWS estimate for CA3710750)

Service area: JURUPA VALLEY

Population: 36827 people (EPA SDWIS 2026Q2 active CWS estimate for CA3310044)

Service area: TRUCKEE

Population: 36730 people (EPA SDWIS 2026Q2 active CWS estimate for CA2910003)

Service area: FOSTER CITY

Population: 36556 people (EPA SDWIS 2026Q2 active CWS estimate for CA4110021)