County · Pennsylvania
Westmoreland County, Pennsylvania: drinking water records
This overview covers 77 ZIP codes and 15 community water systems in Westmoreland County. It also stands in for 3 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 |
|---|---|---|---|---|---|
| Mawc Sweeney Plant PA5650032 | 143,000 | 120 | 0 | 2 | 3.5 ppb |
| Latrobe Muni Auth PA5650060 | 30,000 | 120 | 0 | 2 | 1.6 ppb |
| Highridge Water Auth PA5650069 | 16,000 | 240 | 6 | 3 | 6.4 ppb |
| New Kensington Muni Auth PA5650070 | 47,800 | 120 | 0 | 0 | 0 ppb |
| Derry Boro Muni Auth PA5650049 | 6,500 | 120 | 1 | 0 | 1.0 ppb |
| Fairfield Manor MHP PA5650098 | 92 | 0 | 0 | 1 | 1 ppb |
| Pine Garden Apartments PA5650026 | 40 | 0 | 0 | 2 | 15.9 ppb |
| Little Acres MHP PA5650012 | 30 | 0 | 0 | 1 | 2 ppb |
| Ligonier TWP Muni Auth PA5650080 | 3,293 | 0 | 0 | 0 | 1.3 ppb |
| Mawc Furnace Run PA5650031 | 3,100 | 0 | 0 | 0 | 7 ppb |
| Youngstown Boro Muni Auth PA5650081 | 2,730 | 0 | 0 | 0 | 0 ppb |
| Torrance State Hospital PA5650036 | 997 | 0 | 0 | 0 | 20 ppb |
| Waterford Waterworks PA5650037 | 389 | 0 | 0 | 0 | 14 ppb |
| Sun Dial Village MHP PA5650017 | 90 | 0 | 0 | 0 | 17 ppb |
| Laurel Mountain Borough PA5650101 | 110 | 0 | 0 | 0 | not reported |
ZIP reports in Westmoreland 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: 15655, 15677, 15687.
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.