Water systems with the most health-based lead rule violations
Health-based Lead and Copper Rule violations are treatment failures: corrosion control not studied or installed, water chemistry out of range, lead line replacement or public education requirements not met. These are the systems with the most since 2015, from EPA SDWIS records.
| Rank / water system | Health-based | All violations | Open | Lead + galv. lines |
|---|---|---|---|---|
| 1City of JacksonJackson, MS | 16 | 16 | 1 | 13,816 |
| 2Ancora Psychiatric HospiWinslow Twp., NJ | 9 | 30 | 0 | 0 |
| 3Trenton Water WorksEwing Twp., NJ | 7 | 22 | 1 | 16,180 |
| 4Jefferson TWP W U LK HopJefferson Twp., NJ | 7 | 21 | 0 | 1 |
| 5Haviland M.H.P. #1 - Andrea & Debra CTHyde Park, NY | 7 | 15 | 0 | 0 |
| 6Broken Wrench LLCCasper, WY | 7 | 9 | 0 | 0 |
| 7Llano Grande Lake Park EastHidalgo County, TX | 6 | 28 | 7 | 0 |
| 8Herkimer VillageHerkimer, NY | 6 | 9 | 1 | 0 |
| 9Town of Ringgold Water SystemBienville Parish County, LA | 6 | 7 | 0 | 0 |
| 10Belleville Water DeptBelleville Town, NJ | 5 | 28 | 3 | 4,411 |
| 11Borough of WoodbineWoodbine Boro, NJ | 5 | 19 | 0 | 0 |
| 12Lake Mills WaterworksLake Mills, WI | 5 | 17 | 1 | 152 |
| 13Montgomery Place Water SystemMontgomery County, TX | 5 | 17 | 1 | 0 |
| 14Genoa City WaterworksGenoa City, WI | 5 | 14 | 0 | 199 |
| 15Ashland Water UtilityAshland, WI | 5 | 12 | 0 | 600 |
| 16City of BurtonWashington County, TX | 5 | 6 | 0 | 4 |
| 17Liberty Utilities New York - LynbrookHempstead, NY | 5 | 5 | 0 | 4,271 |
| 18Glendale WSCTrinity County, TX | 4 | 34 | 9 | 0 |
| 19Mt Olive Villages WaterMount Olive Twp., NJ | 4 | 22 | 2 | 0 |
| 20SLC WSCLimestone County, TX | 4 | 17 | 3 | 0 |
| 21Sussex W DeptSussex Boro, NJ | 4 | 16 | 1 | 2 |
| 22Everett Square Windcrest EstatesMontgomery County, TX | 4 | 14 | 1 | 0 |
| 23City of FairfieldFreestone County, TX | 4 | 13 | 6 | 0 |
| 24Milltown W DeptEast Brunswick Twp., NJ | 4 | 12 | 0 | 59 |
| 25Town of RyePueblo County, CO | 4 | 12 | 0 | 2 |
| 26Kirk Glen S/DWeaverville, NC | 4 | 12 | 1 | 0 |
| 27Benton HarborBenton Harbor, MI | 4 | 10 | 0 | 0 |
| 28Harrisburg WSCJasper County, TX | 4 | 10 | 0 | 3 |
| 29Sparta TWP Water Utility - Lake MohawkSparta Twp., NJ | 4 | 9 | 2 | 0 |
| 30Fort Gates WSCCoryell County, TX | 4 | 9 | 0 | 0 |
| 31City of HitchcockGalveston County, TX | 4 | 8 | 1 | 0 |
| 32Choctaw Utilities, INC.Madison County, OH | 4 | 8 | 0 | 0 |
| 33Town of Pine BluffsPine Bluffs, WY | 4 | 8 | 0 | 0 |
| 34WestfieldWestfield, IL | 4 | 8 | 2 | 0 |
| 35Ynp-Old FaithfulYellowstone Np, WY | 4 | 7 | 0 | 10 |
| 36Grabill Water WorksGrabill, IN | 4 | 7 | 2 | 0 |
| 37Linkwood Estates SubdivisionTarrant County, TX | 4 | 6 | 1 | 0 |
| 38Big Oak RehabPittsgrove Twp., NJ | 4 | 6 | 0 | 1 |
| 39Juneau WaterworksJuneau, WI | 4 | 5 | 0 | 1 |
| 40KalamazooKalamazoo, MI | 4 | 4 | 0 | 4,614 |
| 41City of EdmonsonHale County, TX | 3 | 29 | 4 | 0 |
| 42Bloomfield Water DepartmentBloomfield Town, NJ | 3 | 26 | 0 | 351 |
| 43Highland WSCParker County, TX | 3 | 24 | 1 | 0 |
| 44City of GladewaterGregg County, TX | 3 | 23 | 1 | 0 |
| 45Splendora WoodsLiberty County, TX | 3 | 17 | 0 | 0 |
| 46Pearces Mobile Home EstatesMauston, WI | 3 | 17 | 0 | 0 |
| 47ChrismanChrisman, IL | 3 | 16 | 1 | 0 |
| 48Elmo WSCKaufman County, TX | 3 | 15 | 0 | 0 |
| 49Sligo Water System IncorporatedBossier Parish County, LA | 3 | 14 | 0 | 0 |
| 50New Lisbon Development CTRWoodland Twp., NJ | 3 | 14 | 0 | 0 |
| 51Harding Woods MHPPittsgrove Twp., NJ | 3 | 14 | 0 | 0 |
| 52Rowena WSCRunnels County, TX | 3 | 14 | 0 | 23 |
| 53Longford Place Water SystemOrange County, TX | 3 | 14 | 0 | 0 |
| 54West Caldwell Water DepartmentWest Caldwell Boro, NJ | 3 | 13 | 0 | 12 |
| 55Branchville W DeptBranchville Boro, NJ | 3 | 13 | 1 | 1 |
| 56City of RoscoeNolan County, TX | 3 | 13 | 0 | 0 |
| 57Lake Tamarack W CoHardyston Twp., NJ | 3 | 13 | 0 | 0 |
| 58City of SweenyBrazoria County, TX | 3 | 12 | 0 | 0 |
| 59Tilton Terrace MHPEgg Harbor Twp, NJ | 3 | 12 | 0 | 126 |
| 60Kinnelon Water DeptKinnelon Boro, NJ | 3 | 11 | 1 | 0 |
| 61Newfield Water DepartmentFranklin Twp., NJ | 3 | 11 | 1 | 0 |
| 62Westville Water DepartmentWestville Boro, NJ | 3 | 10 | 0 | 0 |
| 63Woodland Park Water DepartmentWoodland Park Boro, NJ | 3 | 10 | 0 | 0 |
| 64Coleman County SUDColeman County, TX | 3 | 10 | 0 | 0 |
| 65410 Water SupplyRed River County, TX | 3 | 10 | 0 | 0 |
| 66City of ComancheComanche County, TX | 3 | 9 | 0 | 96 |
| 67Waterloo WaterworksWaterloo, WI | 3 | 9 | 0 | 0 |
| 68City of ElkhartAnderson County, TX | 3 | 9 | 0 | 0 |
| 69Columbus Grove VillagePutnam County, OH | 3 | 9 | 0 | 0 |
| 70Remington Water WorksRemington, IN | 3 | 9 | 0 | 170 |
| 71The CliffsPalo Pinto County, TX | 3 | 9 | 0 | 0 |
| 72Piedmont Municipal WTR WKSPiedmont, WV | 3 | 9 | 4 | 6 |
| 73Fieldsboro Water DepartmentFieldsboro Boro, NJ | 3 | 9 | 1 | 41 |
| 74Cedar Grove Water DeptCedar Grove Twp., NJ | 3 | 8 | 1 | 11 |
| 75Silvis Heights Water CorpRock Island County, IL | 3 | 8 | 1 | 0 |
| 76Richton ParkRichton Park, IL | 3 | 7 | 1 | 262 |
| 77ErieErie, IL | 3 | 7 | 1 | 71 |
| 78Sky Harbour WSCHood County, TX | 3 | 7 | 0 | 0 |
| 79Town of BettertonKent County, MD | 3 | 7 | 0 | 0 |
| 80Lone Willow MHP WestHarris County, TX | 3 | 7 | 0 | 0 |
| 81Newark Water DepartmentBelleville Town, NJ | 3 | 6 | 0 | 0 |
| 82Roxbury TWP W Dept-Sky VRoxbury Twp., NJ | 3 | 6 | 1 | 0 |
| 83Rockin J Ranch SubdivisionBlanco County, TX | 3 | 6 | 0 | 0 |
| 84ChenoaChenoa, IL | 3 | 6 | 1 | 34 |
| 85Southland Utilities - Golden AcresSierra Vista, AZ | 3 | 6 | 0 | 0 |
| 86Town of CeciltonCecil County, MD | 3 | 6 | 1 | 0 |
| 87City of BastropBastrop County, TX | 3 | 5 | 0 | 128 |
| 88Red BudRed Bud, IL | 3 | 5 | 0 | 46 |
| 89City of Hilshire VillageHarris County, TX | 3 | 5 | 0 | 4 |
| 90Kingman Water WorksKingman, IN | 3 | 5 | 0 | 28 |
| 91Huntington Fire District 1Huntington, VT | 3 | 5 | 0 | 0 |
| 92Harris County MUD 155Harris County, TX | 3 | 4 | 0 | 0 |
| 93Southwest Harris County MUD 1Harris County, TX | 3 | 4 | 0 | 1 |
| 94Hillsboro WaterworksHillsboro, WI | 3 | 4 | 0 | 0 |
| 95Liberty Utilities New York - MerrickHempstead, NY | 3 | 3 | 0 | 48 |
| 96Portage County Water ResourcesPortage County, OH | 3 | 3 | 0 | 0 |
| 97City of Swartz CreekSwartz Creek, MI | 3 | 3 | 0 | 0 |
| 98Putnam Community Water Association PWSWashington County, OH | 3 | 3 | 0 | 1 |
| 99City of DrainDouglas County, OR | 3 | 3 | 0 | 0 |
| 100Camp PointCamp Point, IL | 3 | 3 | 0 | 0 |
Community water systems serving 1,000+ people or with lead or unknown lines. Monitoring and reporting violations are counted in "All violations." Source: EPA SDWIS violation records.
Cite this list
Lead Pipe Map, "Water systems with the most health-based lead rule violations," November 1, 2026, https://leadpipemap.com/rankings/lead-rule-violations/. Data: EPA SDWIS service line inventory, 2026 Q3.
Journalists and researchers are welcome to use these figures with a link back.