Lead Pipe Map

Lead pipes in California

California's 2,919 community water systems reported 3 lead and 12,440 galvanized-requiring-replacement service lines, plus 593,838 of unknown material. That ranks #32 among states for confirmed lead lines.

3Lead
12,440Galvanized, replace
593,838Unknown
92Systems with lead

0.1% of the service lines California utilities reported are lead or galvanized requiring replacement, well below the national share of 3.1%. 5.9% are still unidentified (national: 21%). The largest counts are in East Bay MUD (3,935), Western Heights Water Company (1,462), San Luis Obispo Water Department (890). 192 systems haven't reported counts yet.

Since 2025 Q1, reported lead and galvanized lines in California went from 10,597 to 12,443 (up 1,846). See which systems made the most progress.

Systems with confirmed lead lines (92)

Water systemLeadGalv.Unknown% leadPeople
East Bay MUDAlameda County03,93501.0%1,468,000
Western Heights Water CompanySan Bernardino County01,4622863%7,735
San Luis Obispo Water DepartmentSan Luis Obispo County089004.9%49,534
City of ChinoChino087203.6%90,187
Sfpuc City Distribution DivisionSan Francisco County06534070.4%848,019
Norwalk - City, Water Dept.Norwalk0551339.7%20,283
City of SonomaSonoma048343211%10,619
Victorville Water DistrictSan Bernardino County040801.1%140,721
Chester Public U.D.Plumas County0201016%2,187
City of CeresCeres01775,0761.5%54,513
City of OakdaleOakdale017602.1%23,235
City of Grass ValleyGrass Valley01542,0416.1%4,947
El Segundo-City, Water Dept.El Segundo01451792.9%16,777
City of GreenfieldGreenfield014453.5%18,967
City of TulareTulare014200.7%72,241
City of RiverbankRiverbank01341,7291.8%25,625
City of TustinTustin013000.9%65,143
City of PetalumaPetaluma01224,5880.6%61,427
City of GonzalesGonzales012206.2%8,333
Alta Sierra Mutual Water Co.Kern County011410346%22
City of FairfieldFairfield09100.3%120,720
Banning HTS. Mutual Water Co.Riverside County081141%567
Placerville, City of - MainEl Dorado County0781,7772.6%9,224
Indian Wells Valley W.D.Kern County078790.6%41,474
Abrams Lake Mobile EstatesSiskiyou County0720100%135
Slocsa #10a - CayucosSan Luis Obispo County06608.4%1,200
Country Western MHRVStanislaus County0610100%55
City of Santa Maria Utilities DepartmentSanta Barbara County06019,7430.2%112,208
Los Alamos Community Services DistrictSanta Barbara County05609.0%1,534
Hometown Colonial Estates LLCSacramento County050034%400
Capell Valley EstatesNapa County048073%208
California Mens ColonySan Luis Obispo County045019%15,000
Gerber Las Flores CSDTehama County044052%1,200
Box Springs Mutual WCRiverside County04206.6%3,382
South Cloverdale Water CompanySonoma County0360100%90
Lone Pine MHPStanislaus County0320100%64
Tres Pinos CWDSan Benito County031527%350
4n Mobilehome ParkStanislaus County0310100%65
City of LemooreLemoore0259072.5%27,185
Slo CWWD No. 23 - Santa MargaritaSan Luis Obispo County02505.0%1,291
Arvin Community Services DistKern County0201,9060.4%19,669
New Camaldoli Hermitage WSMonterey County020040%33
Portola Improvement Association MWCSan Mateo County019056%80
City of HanfordHanford0170<0.1%62,127
Cal Am - West San MartinSanta Clara County01604.7%1,079
Golden Sands Mobile Home ParkLos Angeles County016011%450
Town of YountvilleNapa County01501.8%2,785
Sonoma County Water AgencySonoma County01508.4%0
Teviston Community Services DistrictTulare County01479.7%403
Rainbow Municipal WDSan Diego County013670.1%23,536
Improvement District No. 1Tulare County0136517%200
Eastside Water AssociationOrange County01303.9%2,000
Lynwood-City, Water Dept.Lynwood012510.1%66,967
City of LoyaltonLoyalton0103232.8%983
Colusa Co. WWD #2 - PrincetonColusa County0101027.8%382
City of BeniciaBenicia01000.1%27,131
City of ArcataArcata093,5720.1%18,857
Guadalupe Water DepartmentSanta Barbara County0900.4%8,897
Green River Mutual Water Co.San Luis Obispo County0907.7%350
Foothill Estates MHPSan Bernardino County09011%53
Mecchi Water CompanySanta Clara County081726%104
Rapid River Mobilehome ParkShasta County08019%92
Colorado Mutual Water CompanyLos Angeles County08062%37
Wilsona Gardens MutualLos Angeles County073716%136
Crows Landing Comm SVC DistrictStanislaus County0705.5%500
Lewiston Community Services DistrictTrinity County0602.5%677
Folsom, City of - MainFolsom054,413<0.1%80,969
Myoma Dunes Mutual Water CompanyRiverside County056160.2%9,445
Aqua J. Mutual Water CompanyLos Angeles County05010%158
Fenner Canyon Youth Conservation CampLos Angeles County05056%95
City of PlymouthPlymouth036050.3%1,060
Delhi CWDMerced County033150.1%7,784
Lichau Hylands Mutual Water CompanySonoma County031515%56
Shanel Tribal Utility DistrictHopland300100%250
Stonegate Mobile Home ParkSonoma County0304.3%196
Center Water CoSan Bernardino County0305.9%162
Blue Spruce Mobile Home ParkSonoma County0305.6%90
Rancho Seco INC. Water SystemKern County0305.0%33
City of ReedleyReedley026,082<0.1%26,076
US Army Fort IrwinSan Bernardino County02878<0.1%7,800
Willowside Mutual Water CompanySonoma County021581.3%528
MP Mine Operations LLCSan Bernardino County02112%655
Westley CSDStanislaus County0208.3%70
Folsom, City of - AshlandFolsom011,036<0.1%3,300
Barona NorthBarona North Reservation01760.3%1,171
Starlite Community Service DistrictInyo County01571.3%241
La Canada Irrigation Dist.Los Angeles County0151<0.1%9,258
Kelly Mutual Water CompanySonoma County01372.4%135
Allensworth CSDTulare County0100.5%531
Pike Ranch Mutual Water CoMadera County0105.0%74
Nicasio Valley Ranch MutualMarin County0107.7%36
Plantation Mobile Home ParkSacramento County0104.8%20

No confirmed lead, but unknown lines remain (335)

Water systemLeadGalv.Unknown% leadPeople
CWS - BakersfieldKern County0052,0600%268,129
City of VallejoVallejo0036,3850%121,420
California Water Service Co. - DominguezLos Angeles County0031,8690%149,490
CWS - VisaliaTulare County0028,1740%153,522
California Water Service Co. - ElaLos Angeles County0026,8740%142,140
California Water Service Co. - Herm/RedoLos Angeles County0024,3550%100,072
California Water Service Co. - Palos VerLos Angeles County0023,5000%70,830
Cal-Water Service Co.-ChicoButte County0019,3840%110,473
City of BakersfieldBakersfield0016,2910%171,108
California Water Service-S San FranciscoSan Mateo County0015,4460%62,609
California Water Service - LivermoreAlameda County0014,4000%60,414
City of PortervillePorterville0012,7170%63,487
Monterey Park-City, Water Dept.Monterey Park0012,1780%61,096
City of DavisDavis0010,0760%67,826
California Water Service - San CarlosSan Mateo County0010,0760%34,801
Lake Hemet MWDRiverside County009,6850%52,913
City of West SacramentoWest Sacramento008,6450%55,991
City of ImperialImperial007,1430%22,102
California Water Service Co - WestlakeVentura County006,8950%19,544
San Lorenzo Valley Water DistSanta Cruz County006,7760%21,513
Placer Cwa - FoothillPlacer County006,5850%93,417
City of BrawleyBrawley005,9620%26,862
Georgetown Divide PUDEl Dorado County004,7080%9,434
Big Bear City CSDBig Bear City004,5780%12,738
CWS - SelmaFresno County004,2940%25,651
Nevada ID - E. George, Banner MountainNevada County004,0280%17,154
Cal-Water Service Co.-OrovilleButte County003,8790%11,047
Sbdno County Service Area 64San Bernardino County003,8710%14,955
City of LivingstonLivingston003,5890%14,894
Cal-Water Service Co.-MarysvilleYuba County003,5420%12,888
Rio Linda/Elverta Community Water DistSacramento County003,3740%15,460
City of TehachapiTehachapi003,3680%9,094
Sbdno County Service Area 70jSan Bernardino County003,3010%12,895
Placer Cwa - Auburn/BowmanPlacer County003,1320%27,317
Lincoln Avenue Water Co.Los Angeles County003,0750%8,721
Nevada ID - Loma RicaNevada County002,9550%14,072
City of ParlierParlier002,7830%14,576
California Water Service Co. - DixonSolano County002,6490%10,623
City of RosevilleRoseville002,6380%165,736
City of WillitsWillits002,5740%6,175
City of GridleyGridley002,3490%7,269
Cal-Water Service Co.-WillowsGlenn County002,3140%7,107
City of WaterfordModesto002,2400%8,788
Mammoth CWDMono County002,2180%8,234
Sea Ranch Water Company (Puc)Sonoma County001,8890%1,287
City of CorningCorning001,8590%8,244
Nevada ID - Lake WildwoodNevada County001,8520%9,108
SSWD - del Paso Manor Service AreaSacramento County001,7980%4,854
City of California CityCalifornia City001,7880%14,198
City of Orange CoveOrange Cove001,7790%9,525

Showing 50. See all

No lead or unknown lines reported (748)

Systems serving 1,000 or more people. Systems without counts on file are listed as 0.

Water systemLeadGalv.Unknown% leadPeople
Los Angeles-City, Dept. of Water & PowerLos Angeles0000%3,875,566
City of San DiegoSan Diego0000%1,408,937
San Jose WaterSanta Clara County0000%1,039,920
Eastern Municipal WDRiverside County0000%659,923
City of FresnoFresno0000%545,970
City of Sacramento MainSacramento0000%527,979
Long Beach Utilities DepartmentLong Beach0000%466,772
Irvine Ranch Water DistrictOrange County0000%450,323
City of AnaheimAnaheim0000%350,254
City of Santa AnaSanta Ana0000%316,184
City of RiversideRiverside0000%302,776
Santa Clarita Valley Water AgencyLos Angeles County0000%292,014
Helix Water DistrictSan Diego County0000%277,918
GSWC - SouthwestLos Angeles County0000%277,740
Coachella VWD: Cove CommunityRiverside County0000%270,000
Otay Water DistrictSan Diego County0000%242,155
San Gabriel Valley Water Co.-El MonteLos Angeles County0000%240,000
San Gabriel Valley WC - FontanaSan Bernardino County0000%228,270
City of ModestoModesto0000%218,915
San Bernardino CitySan Bernardin00000%214,665
Cucamonga Valley Water DistrictSan Bernardino County0000%213,375
Contra Costa Water DistrictContra Costa County0000%210,500
Los Angeles CWWD 40 Reg 4 & 34 LancasterLos Angeles County0000%208,129
City of Huntington BeachHuntington Beach0000%201,000
Oxnard Water DeptVentura County0000%200,232
Sacramento Suburban Water DistrictSacramento County0000%194,444
City of StocktonStockton0000%192,702
Glendale-City, Water Dept.Glendale0000%192,212
Marin Municipal Water DistrictMarin County0000%188,116
Ontario Municipal Utilities CompanyOntario0000%185,010
Sweetwater AuthoritySan Diego County0000%184,915
California Water Service - StocktonSan Joaquin County0000%182,775
City of Santa RosaSanta Rosa0000%178,452
City of OceansideOceanside0000%174,340
City of Garden GroveGarden Grove0000%174,226
Suburban Water Systems-San JoseLos Angeles County0000%170,523
Elsinore Valley MWDRiverside County0000%169,455
City of CoronaCorona0000%169,380
Moulton Niguel Water DistrictOrange County0000%168,315
Pasadena Water and PowerPasadena0000%165,448
Santa Margarita Water DistrictOrange County0000%165,275
City of HaywardHayward0000%162,954
City of SunnyvaleSunnyvale0000%157,566
Pomona - City, Water Dept.Pomona0000%151,713
Rancho California Water DistrictRiverside County0000%146,147
City of FullertonFullerton0000%140,054
City of EscondidoEscondido0000%137,044
Jurupa Community SDRiverside County0000%134,638
City of Santa ClaraSanta Clara0000%134,587
Vista Irrigation DistrictSan Diego County0000%134,501

Showing the 50 largest. See all

Lead pipes in California cities

All California cities and towns · Lead pipes by county

California lead pipe questions

How many lead pipes are in California?

California's community water systems reported 3 lead service lines and 12,440 galvanized lines that must be replaced, for 12,443 in total. Another 593,838 lines are of unknown material.

Which California water systems have the most lead pipes?

East Bay MUD (3,935), Western Heights Water Company (1,462), San Luis Obispo Water Department (890). Counts are lead plus galvanized-requiring-replacement lines.

What share of California service lines are lead?

0.1% of reported service lines in California are lead or galvanized requiring replacement, well below the national figure of 3.1%. 5.9% are still unknown, compared with 21% nationally.

How do I find out if my California home has a lead service line?

Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.

Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.