Lead Pipe Map

Lead pipes in America’s 100 largest water systems

67 of the 100 largest U.S. community water systems by population served reported at least one confirmed lead or galvanized-requiring-replacement service line. Sorted by people served.

Rank / water systemLeadGalv.Unknown% leadPeople
1New York City SystemNew York, NY120,9313,266124,91715%8,271,000
2Los Angeles-City, Dept. of Water & PowerLos Angeles, CA0000%3,875,566
3City of HoustonHarris County, TX00427,1110%2,970,543
4ChicagoCook County, IL350,53110,32639,42774%2,721,308
5San Antonio Water SystemBexar County, TX043346,335<0.1%2,643,729
6MwraBoston, MA0000%2,580,000
7Mdwasa - Main SystemMiami, FL00289,9300%2,377,460
8Washington Suburban Sanitary CommissionMontgomery County, MD81,27757,1210.2%1,900,000
9City of PhoenixPhoenix, AZ0506227,5170.1%1,695,000
10Philadelphia Water DepartmentPhiladelphia County, PA16,8051,777351,5133.5%1,600,000
11City of BaltimoreBaltimore City County, MD47385335,694<0.1%1,600,000
12Las Vegas Valley Water DistrictLas Vegas, NV0000%1,539,277
13East Bay MUDAlameda County, CA03,93501.0%1,468,000
14City of San DiegoSan Diego, CA0000%1,408,937
15Dallas Water UtilityDallas County, TX06258,104<0.1%1,356,479
16Columbus Public Water SystemFranklin County, OH25,1558,09365,26612%1,309,468
17Cleveland Public Water SystemCuyahoga County, OH144,19352856,95433%1,308,955
18Denver Water BoardDenver County, CO15,82684834,0575.4%1,287,000
19Charlotte WaterCharlotte, NC0660<0.1%1,206,285
20Seattle Public UtilitiesKing County, WA0000%1,161,961
21Fairfax County Water AuthorityFairfax County, VA162115<0.1%1,121,613
22City of Austin Water & WastewaterTravis County, TX077700.3%1,115,323
23Mo American St Louis St Charles CountiesSt. Charles County, MO9,4221,247191,3412.7%1,111,000
24Suffolk County Water AuthorityBabylon, NY11054<0.1%1,100,000
25AtlantaAtlanta, GA0043,4290%1,089,893
26MetropolitanoBayamon, PR03190,837<0.1%1,084,637
27San Jose WaterSanta Clara County, CA0000%1,039,920
28Gwinnett Co. Dept. of Water ResourcesBuford, GA0000%975,000
29City of Fort WorthTarrant County, TX032,590011%955,900
30Citizens Water - IndianapolisIndianapolis, IN56,76619539,93515%880,345
31Tri Town Water BoardBraintree, MA000–856,000
32Sfpuc City Distribution DivisionSan Francisco County, CA06534070.4%848,019
33Jea Major GridJacksonville, FL08,36539,5561.9%826,664
34Aqua PA Main SystemMontgomery County, PA554,59539,2171.5%822,600
35Louisville Water CompanyJefferson County, KY4832,06459,5210.8%806,997
36Cincinnati Public Water SystemHamilton County, OH34,673444515%800,000
37Veolia Water New Jersey HackensackAlpine Boro, NJ11,5673164,1265.8%792,713
38Metro Water ServicesNashville, TN2,81821,85576,18011%789,969
39El Paso Water UtilitiesEl Paso County, TX09134,633<0.1%747,168
40Dekalb CountyDekalb County, GA00155,8350%743,000
41City of Tampa Water DepartmentTampa, FL094827,3750.6%733,886
42City of TucsonTucson, AZ0341140,7970.1%732,906
43Cobb CountyCobb County, GA0000%695,000
44PA Amer Water Co-PittsburghAllegheny County, PA4,2901,780207,1012.6%686,000
45Boston Water and Sewer Commission (Mwra)Boston, MA2,1842654,1802.5%675,647
46Palm Beach County Water UtilitiesWest Palm Beach, FL0000%671,114
47Kentucky-American Water CoFayette County, KY283969,237<0.1%669,042
48Portland Water BureauMultnomah County, OR0000%666,200
49Metropolitan Utilities DistrictOmaha, NE11,7383332,5055.2%660,000
50Eastern Municipal WDRiverside County, CA0000%659,923
51Memphis Light, Gas, & WaterMemphis, TN17,022532164,5915.7%659,500
52Central Alabama WaterBirmingham, AL12,3501836,8395.3%653,322
53City of RaleighRaleigh, NC6036710,3660.2%650,000
54Oklahoma CityOklahoma County, OK173632,667<0.1%644,000
55City of DetroitDetroit, MI80,59512039,07332%633,218
56D.C. Water and Sewer AuthorityDistrict Of Columbia County, DC16,93519013,38812%632,323
57Hnl-Windward-Pearl HarborHonolulu-Windward-Pearlharbor, HI0000%631,389
58Milwaukee WaterworksMilwaukee, WI65,331026,34141%626,000
59NJ American Water - RaritanElizabeth City- 2004, NJ4295,59076,7162.7%615,430
60Baton Rouge Water CompanyEast Baton Rouge Parish County, LA01,00734,1470.4%596,844
61Albuquerque Water SystemAlbuquerque, NM020170,705<0.1%560,326
62Kansas City PWSKansas City, MO022,95124,82713%553,295
63City of FresnoFresno, CA0000%545,970
64Orlando Utilities CommissionOrlando, FL0000%536,466
65City of AuroraArapahoe County, CO124649,2860.5%533,407
66City of Sacramento MainSacramento, CA0000%527,979
67McWaBatavia, NY1073,2649,9871.9%525,262
68Pittsburgh Water & Sewer AuthAllegheny County, PA16,1652,2502,36123%520,000
69Hcwrd/South-CentralLithia, FL0000%515,012
70Pinellas County UtilitiesClearwater, FL06,47263,7895.6%506,353
71Water District 1 of Johnson CoKansas City, KS02493,5510.6%490,000
72Long Beach Utilities DepartmentLong Beach, CA0000%466,772
73City of MesaMesa, AZ07422,430<0.1%466,000
74Colorado Springs UtilitiesEl Paso County, CO0000%464,111
75Irvine Ranch Water DistrictOrange County, CA0000%450,323
76City of Tacoma Water DivisionPierce County, WA0000%446,245
77Truckee Meadows Water AuthorityReno, NV0000%442,000
78City of Virginia BeachVirginia Beach City, VA0017,3170%437,994
79North Fulton CountyFulton County, GA02425,409<0.1%434,517
80Greenville Water (Sc2310001)Greenville, SC0000%426,057
81MinneapolisHennepin County, MN38,34113296238%425,300
82Regional Water AuthorityAnsonia, CT172,2075,9631.8%418,900
83City of ArlingtonTarrant County, TX018900.2%413,955
84TulsaTulsa County, OK00128,2160%413,000
85City of Newport NewsNewport News City, VA03,1609,5462.3%407,300
86City of WichitaWichita, KS166,01540,1643.6%395,699
87Saint Paul Regional Water ServicesRamsey County, MN17,77246,08418%392,529
88City of Winston-SalemClemmons, NC515763,1940.4%391,900
89Metropolitan District CommissionBerlin, CT04314,029<0.1%390,887
90Chesterfield Co Central Water SystemChesterfield County, VA0000%389,897
91Salt Lake City Water SystemSalt Lake County, UT12010231,8660.3%383,612
92NJ American Water - Coastal NorthAberdeen Twp, NJ1922,65374,7241.8%377,613
93North Las Vegas UtilitiesNorth Las Vegas, NV04106,375<0.1%376,515
94City of VancouverClark County, WA0000%373,047
95Central Arkansas WaterPulaski County, AR09,8043,9535.7%368,455
96City of ToledoLucas County, OH3,0536,37433,5138.1%360,000
97Columbia City of (Sc4010001)Columbia, SC001960%354,068
98Aquarion-Eastern Fairfield CountyBeacon Falls, CT3,94832363,0083.9%351,756
99City of AnaheimAnaheim, CA0000%350,254
100OcwaSyracuse, NY4003,49572,0993.3%350,000

Source: EPA SDWIS service line inventory, 2026 Q3. Population is the population served reported to EPA.

Cite this list

Lead Pipe Map, "Lead pipes in America’s 100 largest water systems," November 1, 2026, https://leadpipemap.com/rankings/largest-cities/. Data: EPA SDWIS service line inventory, 2026 Q3.

Journalists and researchers are welcome to use these figures with a link back.