Water systems whose latest lead test exceeded the action level
In EPA's data, the latest 90th-percentile lead result for 496 community water systems was above the 15 ppb action level. 139 of them also reported lead or galvanized service lines. An exceedance triggers public education and corrosion-control steps; it doesn't mean every home is affected.
| Rank / water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| 1Alderwood Water DistrictSnohomish County, WA | 0 | 0 | 24,002 | 0% |
| 2AuroraAurora, IL | 16,063 | 0 | 16 | 32% |
| 3ElginElgin, IL | 8,221 | 1 | 1,465 | 24% |
| 4Quincy Water Dept. (Mwra)Quincy, MA | 451 | 1 | 44 | 2.2% |
| 5Northshore Utility DistrictKing County, WA | 0 | 0 | 2,001 | 0% |
| 6Troy City PWSTroy, NY | 1,564 | 77 | 7,777 | 13% |
| 7Central ASGTutuila, AS | 0 | 0 | 0 | 0% |
| 8BartlettBartlett, IL | 59 | 12 | 0 | 0.5% |
| 9Garden CityGarden City, MI | 315 | 0 | 577 | 2.7% |
| 10City of RiverbankRiverbank, CA | 0 | 134 | 1,729 | 1.8% |
| 11Morton GroveMorton Grove, IL | 3,108 | 0 | 0 | 38% |
| 12Vera Water & PowerSpokane County, WA | 0 | 31 | 13 | 56% |
| 13FaribaultRice County, MN | 918 | 158 | 92 | 15% |
| 14East MolineEast Moline, IL | 362 | 31 | 5,008 | 5.5% |
| 15Lake ForestLake Forest, IL | 250 | 0 | 31 | 3.6% |
| 16LemontLemont, IL | 57 | 8 | 1,452 | 1.0% |
| 17Usmc - 29 PalmsSan Bernardino County, CA | 0 | 0 | 0 | 0% |
| 18Mun Water Auth of AliquippaBeaver County, PA | 105 | 37 | 3,618 | 2.4% |
| 19Indiana American Water - WabashWabash, IN | 40 | 228 | 3,794 | 5.4% |
| 20R.C. Willis WTP (City of Palatka)Palatka, FL | 0 | 0 | 0 | 0% |
| 21Lewes Board of Public WorksLewes, DE | 63 | 32 | 1,815 | 2.5% |
| 22North Beach WaterPacific County, WA | 0 | 10 | 0 | 2.9% |
| 23Ilion (V) Water WorksIlion, NY | 97 | 124 | 1,852 | 8.4% |
| 24NewcastleMcClain County, OK | 0 | 0 | 1,047 | 0% |
| 25PrincetonPrinceton, IL | 249 | 1 | 1,189 | 6.4% |
| 26Herkimer VillageHerkimer, NY | 0 | 0 | 2,249 | 0% |
| 27NorthfieldNorthfield, IL | 85 | 0 | 6 | 4.1% |
| 28HighwoodHighwood, IL | 271 | 0 | 9 | 24% |
| 29Town of Greenwood Water SystemCaddo Parish County, LA | 0 | 0 | 0 | 0% |
| 30Cottonwood Municipal Water Vv6Cottonwood, AZ | 0 | 0 | 982 | 0% |
| 31Atkins Water SystemPope County, AR | 0 | 0 | 1,309 | 0% |
| 32Pearl River Central W/A-Bi CoPearl River County, MS | 0 | 0 | 0 | 0% |
| 33Millersview Doole WSCConcho County, TX | 0 | 1 | 0 | 11% |
| 34Treasure IslandSan Francisco County, CA | 0 | 0 | 43 | 0% |
| 35BensonSwift County, MN | 18 | 69 | 729 | 6.1% |
| 36Farmington Water DeptFarmington, NH | 0 | 70 | 1,008 | 6.5% |
| 37Goffstown Village PCTGoffstown, NH | 0 | 0 | 0 | – |
| 38New London Springfield WaterNew London, NH | 0 | 0 | 161 | 0% |
| 39Kotzebue Mun. Water SystemKotzebue, AK | 0 | 0 | 0 | 0% |
| 40Corbet WSCNavarro County, TX | 0 | 0 | 0 | 0% |
| 41City of WalsenburgHuerfano County, CO | 0 | 0 | 0 | – |
| 42Conyngham Sugarloaf Joint MaLuzerne County, PA | 0 | 0 | 1,215 | 0% |
| 43Harris County MUD 144Harris County, TX | 0 | 0 | 0 | 0% |
| 44Newport Boro Water AuthPerry County, PA | 0 | 3 | 889 | 0.3% |
| 45East Taylor Muni AuthCambria County, PA | 0 | 0 | 7 | 0% |
| 46Waterville Valley Water DistWaterville Valley, NH | 0 | 0 | 1,055 | 0% |
| 47Lodi WaterworksLodi, WI | 53 | 44 | 339 | 8.0% |
| 48Gallitzin Boro Water AuthCambria County, PA | 3 | 0 | 885 | 0.3% |
| 49Tri County RWDD -Moores ChapelYell County, AR | 0 | 0 | 0 | 0% |
| 50Cogswell Springs Water WorksHenniker, NH | 0 | 1 | 570 | 0.2% |
| 51Pangburn WaterworksWhite County, AR | 0 | 0 | 743 | 0% |
| 52South Bend Water DepartmentPacific County, WA | 0 | 0 | 59 | 0% |
| 53North Coventry Water SystemChester County, PA | 0 | 0 | 797 | 0% |
| 54Muncy Borough Water CompanyLycoming County, PA | 0 | 0 | 879 | 0% |
| 55Jim Thorpe Borough Water EastCarbon County, PA | 7 | 0 | 961 | 0.7% |
| 56Nesquehoning Boro Water AuthCarbon County, PA | 0 | 2 | 1,216 | 0.2% |
| 57Charlestown Water WorksCharlestown, NH | 0 | 0 | 1,304 | 0% |
| 58Harrisburg WaterworksPoinsett County, AR | 0 | 0 | 881 | 0% |
| 59Hughesville Borough Water AuthLycoming County, PA | 0 | 0 | 1,199 | 0% |
| 60Bonneauville Muni Water AuthAdams County, PA | 0 | 0 | 904 | 0% |
| 61Pawc WestgateNorthampton County, PA | 0 | 8 | 201 | 0.8% |
| 62Groveton Water SysNorthumberland, NH | 0 | 7 | 687 | 1.0% |
| 63Williams Bay WaterworksWilliams Bay, WI | 4 | 3 | 1,112 | 0.4% |
| 64Port Allegany Water DepartmentMcKean County, PA | 226 | 0 | 0 | 22% |
| 65Clark County Country Water FacilitiesClark County, AR | 0 | 0 | 0 | 0% |
| 66Scma-TremontSchuylkill County, PA | 0 | 0 | 814 | 0% |
| 67Bearden WaterworksOuachita County, AR | 0 | 0 | 830 | 0% |
| 68Town of Smithsburg Distribution SystemWashington County, MD | 1 | 6 | 1,144 | 0.6% |
| 69Tilton Northfield Water DistNorthfield, NH | 0 | 3 | 858 | 0.3% |
| 70Red Hill Water AuthorityMontgomery County, PA | 0 | 0 | 1,251 | 0% |
| 71Mineral Point WaterworksMineral Point, WI | 64 | 30 | 672 | 6.8% |
| 72Richwood Water DeptRichwood, WV | 0 | 0 | 740 | 0% |
| 73Berlin Boro Muni AuthSomerset County, PA | 3 | 0 | 882 | 0.3% |
| 74Victor VillageVictor, NY | 0 | 11 | 0 | 1.2% |
| 75Johnsonburg Municipal AuthElk County, PA | 0 | 1 | 1,370 | <0.1% |
| 76Smethport BoroughMcKean County, PA | 5 | 0 | 818 | 0.6% |
| 77Williamstown Boro AuthDauphin County, PA | 0 | 4 | 839 | 0.4% |
| 78Cambridge Springs BoroughCrawford County, PA | 0 | 0 | 1 | 0% |
| 79Plattsburg PWSPlattsburg, MO | 0 | 0 | 1,278 | 0% |
| 80Mercersburg Muni Water AuthFranklin County, PA | 0 | 0 | 3 | 0% |
| 81Southwest Arkansas Water SystemHempstead County, AR | 0 | 0 | 0 | 0% |
| 82GordonGordon, GA | 0 | 0 | 703 | 0% |
| 83Jim Thorpe Borough Water WestCarbon County, PA | 8 | 0 | 663 | 1.0% |
| 84WaverlyWright County, MN | 0 | 6 | 96 | 0.6% |
| 85Borough of DublinBucks County, PA | 0 | 0 | 197 | 0% |
| 86St Correct Inst HuntingdonHuntingdon County, PA | 0 | 0 | 0 | 0% |
| 87Hughes Community Water AssocSt. Francis County, AR | 0 | 0 | 0 | – |
| 88Borough of ConwayBeaver County, PA | 0 | 3 | 777 | 0.3% |
| 89Mitchell County UtilityMitchell County, TX | 0 | 0 | 753 | 0% |
| 90Sisters of Holy Cross-St. Marys CollegeNotre Dame, IN | 0 | 0 | 0 | 0% |
| 91Saint Francis UniversityCambria County, PA | 0 | 0 | 0 | 0% |
| 92SpringfieldBrown County, MN | 3 | 41 | 2 | 4.4% |
| 93Paradise ShoresMoultonborough, NH | 0 | 0 | 410 | 0% |
| 94Muncy State Correctional InstLycoming County, PA | 0 | 0 | 0 | 0% |
| 95Central Arkansas Water ParonSaline County, AR | 0 | 0 | 0 | 0% |
| 96Duncannon Muni WaterPerry County, PA | 3 | 38 | 618 | 6.2% |
| 97Hillsborough Water WorksHillsborough, NH | 0 | 22 | 301 | 6.8% |
| 98East Deer TWP Water DeptAllegheny County, PA | 0 | 0 | 370 | 0% |
| 99Evans City BoroughButler County, PA | 0 | 1 | 885 | 0.1% |
| 100Central City Water AuthSomerset County, PA | 0 | 1 | 720 | 0.1% |
| 101Wye Mountain Water AssociationPerry County, AR | 0 | 0 | 0 | 0% |
| 102Woodsville Water and LightHaverhill, NH | 0 | 2 | 135 | 1.5% |
| 103Pleasant View Water Fac BoardFranklin County, AR | 0 | 0 | 1,101 | 0% |
| 104Dugger UtilitiesDugger, IN | 1 | 1 | 0 | 0.2% |
| 105Centre Hall Boro Water DeptCentre County, PA | 0 | 0 | 0 | 0% |
| 106Leoni TownshipMichigan Center, MI | 0 | 0 | 0 | 0% |
| 107Rimersburg Boro Muni AuthClarion County, PA | 1 | 14 | 747 | 1.7% |
| 108Cornplanter TownshipVenango County, PA | 0 | 10 | 0 | 1.4% |
| 109North Milam WSCMilam County, TX | 0 | 35 | 1 | 6.7% |
| 110Patton Boro Water DeptCambria County, PA | 0 | 0 | 71 | 0% |
| 111Alton Water WorksAlton, NH | 0 | 0 | 259 | 0% |
| 112Wilton Water WorksWilton, NH | 0 | 1 | 181 | 0.5% |
| 113Wysox TWP Municipal AuthorityBradford County, PA | 0 | 0 | 0 | 0% |
| 114Sabana GrandeUtaudo, PR | 0 | 0 | 259 | 0% |
| 115East Berlin Area Joint AuthAdams County, PA | 0 | 32 | 342 | 5.2% |
| 116Bethlehem Village DistBethlehem, NH | 0 | 0 | 878 | 0% |
| 117Braddock Boro Water AuthAllegheny County, PA | 0 | 0 | 0 | – |
| 118Clymer Boro Muni AuthIndiana County, PA | 0 | 0 | 643 | 0% |
| 119Covington Karthaus Girard A AClearfield County, PA | 0 | 0 | 0 | 0% |
| 120US Army GarrisonCumberland County, PA | 0 | 0 | 1 | 0% |
| 121Richland Boro Water SupplyLebanon County, PA | 0 | 0 | 0 | 0% |
| 122Rollinsford Water Sewer DistRollinsford, NH | 2 | 21 | 516 | 4.3% |
| 123Sunapee Water WorksSunapee, NH | 0 | 0 | 448 | 0% |
| 124Gilpin TWP Muni AuthArmstrong County, PA | 0 | 0 | 0 | – |
| 125Blacklick Valley Muni AuthCambria County, PA | 0 | 0 | 0 | 0% |
| 126Murfreesboro WaterworksPike County, AR | 0 | 0 | 1,390 | 0% |
| 127Pittsfield AqueductPittsfield, NH | 0 | 0 | 407 | 0% |
| 128Belmont Water DeptBelmont, NH | 0 | 1 | 569 | 0.2% |
| 129Contoocook Village PCTHopkinton, NH | 0 | 0 | 628 | 0% |
| 130Delight WaterworksPike County, AR | 0 | 0 | 0 | – |
| 131Valley Water CompanyFairbanks, AK | 0 | 0 | 0 | – |
| 132Ashland Water DeptAshland, NH | 0 | 3 | 279 | 1.1% |
| 133Hume Lake Christian Camps, INCFresno County, CA | 0 | 0 | 0 | 0% |
| 134Paw NittanyCentre County, PA | 0 | 5 | 485 | 0.8% |
| 135RichmondStearns County, MN | 2 | 18 | 218 | 3.1% |
| 136Gunstock Acres Village DistGilford, NH | 0 | 0 | 401 | 0% |
| 137Sanbornville Water DeptWakefield, NH | 0 | 0 | 324 | 0% |
| 138Rockingham County ComplexBrentwood, NH | 0 | 0 | 0 | – |
| 139Rainelle Water DeptRainelle, WV | 0 | 0 | 0 | 0% |
| 140Somerset TWP M A FriedensSomerset County, PA | 0 | 0 | 0 | 0% |
| 141Tower LakesTower Lakes, IL | 0 | 0 | 0 | 0% |
| 142Troy Water DeptartmentBradford County, PA | 0 | 0 | 12 | 0% |
| 143Benton Municipal Water AuthColumbia County, PA | 0 | 1 | 201 | 0.2% |
| 144Aqua PA Tanglewood LakesPike County, PA | 0 | 1 | 196 | 0.1% |
| 145MilfordMilford, IL | 55 | 46 | 328 | 17% |
| 146Farmland Municipal Water WorksFarmland, IN | 0 | 0 | 0 | 0% |
| 147Colebrook Water WorksColebrook, NH | 0 | 0 | 0 | – |
| 148Roulette TWP Water AuthorityPotter County, PA | 0 | 0 | 350 | 0% |
| 149Village of Buckingham SpringsBucks County, PA | 0 | 0 | 0 | 0% |
| 150Waterville Estate VLG Dist/WCampton, NH | 0 | 0 | 382 | 0% |
| 151Shinglehouse Boro Water DeptPotter County, PA | 0 | 0 | 0 | 0% |
| 152Troy Water WorksTroy, NH | 0 | 23 | 430 | 5.1% |
| 153Galeton Borough AuthorityPotter County, PA | 0 | 8 | 42 | 1.5% |
| 154Tamiment ResortPike County, PA | 0 | 0 | 0 | 0% |
| 155Cowanshan Yatesboro Numine SysArmstrong County, PA | 0 | 0 | 0 | – |
| 156Bloomfield Boro Water AuthPerry County, PA | 0 | 1 | 310 | 0.2% |
| 157Bradley Co Rural Water AssociationBradley County, AR | 0 | 0 | 257 | 0% |
| 158Grabill Water WorksGrabill, IN | 0 | 0 | 0 | 0% |
| 159MeadowmeerKitsap County, WA | 0 | 0 | 0 | 0% |
| 160Jay TWP Water AuthorityElk County, PA | 0 | 0 | 775 | 0% |
| 161HectorRenville County, MN | 3 | 7 | 430 | 1.7% |
| 162CoparCorozal, PR | 0 | 0 | 0 | – |
| 163Lawson-Urbana Water AssocUnion County, AR | 0 | 0 | 131 | 0% |
| 164Christiana Muni Water AuthLancaster County, PA | 3 | 87 | 12 | 21% |
| 165Greenville Water DeptGreenville, NH | 0 | 2 | 361 | 0.6% |
| 166PA Amer Water Co Indian RocksWayne County, PA | 0 | 1 | 446 | 0.2% |
| 167Pawc Manwalamink NS 3Monroe County, PA | 0 | 0 | 317 | 0% |
| 168Royalton BoroDauphin County, PA | 0 | 0 | 0 | 0% |
| 169Polk CenterVenango County, PA | 0 | 0 | 0 | 0% |
| 170Rosebrook WaterCarroll, NH | 0 | 0 | 402 | 0% |
| 171Highland Est MHPBerks County, PA | 0 | 0 | 0 | 0% |
| 172East Brady Water SystemClarion County, PA | 10 | 17 | 416 | 5.6% |
| 173Southwest Warren Co Mun AuthWarren County, PA | 0 | 0 | 50 | 0% |
| 174Grantville MHPDauphin County, PA | 0 | 0 | 0 | 0% |
| 175East Herkimer Water DistrictHerkimer, NY | 0 | 0 | 0 | 0% |
| 176Lisbon Water DeptLisbon, NH | 0 | 0 | 498 | 0% |
| 177Marvell WaterworksPhillips County, AR | 1 | 0 | 784 | 0.1% |
| 178Selinsgrove CenterSnyder County, PA | 0 | 0 | 0 | – |
| 179Sugarcreek BoroughVenango County, PA | 0 | 0 | 0 | 0% |
| 180Riegelsville Water AuthorityBucks County, PA | 0 | 41 | 349 | 9.9% |
| 181Kreamer Mun AuthSnyder County, PA | 0 | 0 | 319 | 0% |
| 182Aqua PA Mt JewettMcKean County, PA | 0 | 15 | 82 | 3.1% |
| 183Millville Municipal AuthorityColumbia County, PA | 0 | 0 | 370 | 0% |
| 184Beaver Meadows BoroughCarbon County, PA | 0 | 0 | 420 | 0% |
| 185Beavertown Municipal AuthoritySnyder County, PA | 0 | 1 | 380 | 0.2% |
| 186Clarkedale-Jericho Water AssocCrittenden County, AR | 0 | 0 | 158 | 0% |
| 187MalpasoPenuelas, PR | 0 | 0 | 145 | 0% |
| 188Auburn Municipal AuthoritySchuylkill County, PA | 0 | 145 | 0 | 47% |
| 189New Castle Water WorksNew Castle, NH | 0 | 5 | 105 | 4.5% |
| 190Aqua PA Water Co ChinchillaLackawanna County, PA | 0 | 11 | 32 | 3.2% |
| 191Bowmanstown AuthorityCarbon County, PA | 4 | 10 | 203 | 3.3% |
| 192Nwwa Olde Colonial GreeneBucks County, PA | 0 | 0 | 309 | 0% |
| 193WyanetWyanet, IL | 190 | 0 | 26 | 41% |
| 194City of OsceolaOsceola, NE | 3 | 77 | 282 | 17% |
| 195Carroll Water WorksCarroll, NH | 0 | 15 | 413 | 3.5% |
| 196Victor Municipal Water DeptVictor, IA | 7 | 0 | 0 | 1.6% |
| 197City of OsmondOsmond, NE | 0 | 8 | 0 | 2.3% |
| 198Conneaut Lake Borough WTPCrawford County, PA | 0 | 0 | 298 | 0% |
| 199Ossipee Water DeptOssipee, NH | 0 | 0 | 347 | 0% |
| 200McAlisterville Area Joint AuthJuniata County, PA | 0 | 1 | 365 | 0.3% |
| 201City of CrawfordCrawford, NE | 0 | 54 | 566 | 8.6% |
| 202AlexisAlexis, IL | 1 | 0 | 0 | 0.2% |
| 203East Monroe County Water UsersMonroe County, AR | 0 | 0 | 339 | 0% |
| 204Borough of Wampum Water DeptLawrence County, PA | 14 | 1 | 35 | 4.6% |
| 205Lcwsa Limestone WaterLycoming County, PA | 0 | 0 | 233 | 0% |
| 206Grubbs WaterworksJackson County, AR | 0 | 0 | 311 | 0% |
| 207Cottonwood Water AssociationBoone County, AR | 0 | 0 | 328 | 0% |
| 208Keiser WaterworksMississippi County, AR | 0 | 0 | 229 | 0% |
| 209Spring TWP Municipal AuthoritySnyder County, PA | 0 | 2 | 75 | 0.7% |
| 210Bear View CrossingAllenstown, NH | 0 | 0 | 314 | 0% |
| 211Epsom Village Water DistrictEpsom, NH | 0 | 0 | 295 | 0% |
| 212Mountain Lakes Water DistrictHaverhill, NH | 0 | 0 | 349 | 0% |
| 213Meriden Village Water DistPlainfield, NH | 0 | 4 | 74 | 5.1% |
| 214River Run CondosBartlett, NH | 0 | 0 | 213 | 0% |
| 215Gratz Boro Water Revenue FundDauphin County, PA | 0 | 37 | 0 | 14% |
| 216Beth 512 SystemNorthampton County, PA | 0 | 0 | 11 | 0% |
| 217Penns Creek Municipal AuthSnyder County, PA | 0 | 0 | 10 | 0% |
| 218Nwwa Pine RunBucks County, PA | 0 | 0 | 23 | 0% |
| 219Gray Area Watr Auth of Jen TWPSomerset County, PA | 0 | 0 | 202 | 0% |
| 220Marion TWP Water SysBeaver County, PA | 0 | 0 | 22 | 0% |
| 221Austin Borough WaterPotter County, PA | 0 | 0 | 41 | 0% |
| 222Aqua PA Tanglwood NorthPike County, PA | 0 | 0 | 141 | 0% |
| 223Canaan Water DeptCanaan, NH | 0 | 1 | 21 | 4.5% |
| 224LamoilleLa Moille, IL | 38 | 0 | 264 | 11% |
| 225Warner Village Water DistWarner, NH | 0 | 0 | 314 | 0% |
| 226Andover Village DistAndover, NH | 0 | 0 | 110 | 0% |
| 227New Hampton Village PCTNew Hampton, NH | 0 | 1 | 138 | 0.7% |
| 228Campton Village PCTCampton, NH | 0 | 0 | 97 | 0% |
| 229Hill Water WorksHill, NH | 0 | 0 | 157 | 0% |
| 230Covered Bridge Water Works CorporationEast Fishkill, NY | 0 | 0 | 4 | 0% |
| 231BowersvilleBowersville, GA | 0 | 2 | 205 | 0.9% |
| 232Lov WaterFreedom, NH | 0 | 0 | 259 | 0% |
| 233Jasper WaterworksNewton County, AR | 0 | 18 | 148 | 6.9% |
| 234Mapleton Muni Water AuthHuntingdon County, PA | 0 | 0 | 28 | 0% |
| 235Leola WaterworksGrant County, AR | 0 | 0 | 195 | 0% |
| 236Oakland Borough Water AuthSusquehanna County, PA | 0 | 0 | 166 | 0% |
| 237Aqua PA Jefferson HeightsLackawanna County, PA | 0 | 0 | 38 | 0% |
| 238Newfields VLG Water and SewerNewfields, NH | 0 | 0 | 182 | 0% |
| 239Lacrosse Water DepartmentLacrosse, IN | 3 | 12 | 15 | 6.0% |
| 240Franconia Village WaterFranconia, NH | 0 | 13 | 119 | 9.8% |
| 241Nelliston (V) Water WorksNelliston, NY | 0 | 0 | 39 | 0% |
| 242Grand RidgeGrand Ridge, IL | 0 | 22 | 3 | 8.8% |
| 243Scranton Water SystemScranton, IA | 1 | 20 | 75 | 8.6% |
| 244Orangeville Municipal Water AuColumbia County, PA | 0 | 0 | 12 | 0% |
| 245Rouseville Mun WaterworksVenango County, PA | 0 | 3 | 173 | 1.4% |
| 246Jackson Water PCTJackson, NH | 0 | 0 | 168 | 0% |
| 247Georges Mills Water WorksSunapee, NH | 0 | 0 | 159 | 0% |
| 248Valley Dale Water CoPleasant Valley, NY | 0 | 0 | 58 | 0% |
| 249Ulster Municipal AuthorityBradford County, PA | 0 | 0 | 157 | 0% |
| 250Aqua PA Water Co Thornhurst CCLackawanna County, PA | 0 | 0 | 63 | 0% |
Showing the 250 largest by population. Every system's status is on its own page and in the CSV download.
Systems serving 1,000+ people or with any lead or unknown lines. Source: EPA SDWIS service line inventory, 2026 Q3; action level flag from EPA's lead and copper sample data.
Cite this list
Lead Pipe Map, "Water systems whose latest lead test exceeded the action level," November 1, 2026, https://leadpipemap.com/rankings/lead-action-level-exceedances/. Data: EPA SDWIS service line inventory, 2026 Q3.
Journalists and researchers are welcome to use these figures with a link back.