County · Pennsylvania
Lancaster County, Pennsylvania: drinking water records
This overview covers 53 ZIP codes and 95 community water systems in Lancaster County. It also stands in for 13 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| City of Lancaster PA7360058 | 120,000 | 240 | 6 | 2 | 7 ppb |
| Columbia Water Co PA7360123 | 25,200 | 240 | 0 | 1 | 1 ppb |
| East Hempfield Water Auth PA7360063 | 20,988 | 480 | 5 | 1 | 8 ppb |
| Elizabethtown Area Water PA7360124 | 19,000 | 420 | 5 | 1 | 3 ppb |
| Warwick TWP Lititz Sys PA7360116 | 8,561 | 120 | 3 | 2 | 1 ppb |
| Millersville Univ PA7360127 | 7,950 | 60 | 7 | 1 | 3 ppb |
| Upper Leacock Township PA7360140 | 7,734 | 240 | 8 | 2 | 2 ppb |
| East Cocalico Township Auth PA7360113 | 6,735 | 600 | 5 | 1 | 0 ppb |
| East Petersburg Borough PA7360135 | 6,215 | 180 | 7 | 1 | 5.9 ppb |
| West Earl Water Authority PA7360143 | 4,327 | 240 | 1 | 2 | 4.8 ppb |
| Denver Boro PA7360017 | 3,861 | 240 | 2 | 1 | 1.5 ppb |
| Ephrata Area Joint Authority PA7360045 | 24,500 | 240 | 6 | 0 | 1.5 ppb |
| Mt Joy Boro Auth PA7360091 | 15,261 | 240 | 1 | 0 | 4 ppb |
| Lititz Boro PA7360126 | 9,397 | 120 | 1 | 0 | 7 ppb |
| New Holland Borough PA7360099 | 8,490 | 240 | 7 | 0 | 0 ppb |
| Manheim Area Water & Sewer Aut PA7360078 | 6,701 | 120 | 6 | 0 | 0 ppb |
| Akron Borough PA7360128 | 4,200 | 120 | 7 | 0 | 2 ppb |
| East Donegal PA7360083 | 4,048 | 60 | 2 | 0 | 5 ppb |
| Masonic Homes PA7360025 | 3,707 | 60 | 3 | 0 | 2.5 ppb |
| Quarryville Boro PA7360112 | 3,150 | 0 | 0 | 1 | 5 ppb |
| Christiana Muni Water Auth PA7360007 | 1,100 | 0 | 0 | 3 | 70 ppb |
| Quarryville Presby Ret Comm PA7360167 | 750 | 0 | 0 | 1 | 6.4 ppb |
| Deerpark Manor NY3503577 | 500 | 0 | 0 | 1 | 2.8 ppb |
| Fairmount Home PA7360039 | 483 | 0 | 0 | 1 | 4.5 ppb |
| Lancaster Est PA7360090 | 304 | 0 | 0 | 1 | 3.6 ppb |
ZIP reports in Lancaster County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 17502, 17506, 17507, 17516, 17518, 17527, 17529, 17534, 17535, 17536, 17560, 17562, 17568.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.