County · Pennsylvania
Warren County, Pennsylvania: drinking water records
This overview covers 16 ZIP codes and 15 community water systems in Warren County. It also stands in for 9 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 |
|---|---|---|---|---|---|
| Pa American Water Co Warren PA6620020 | 14,650 | 60 | 0 | 1 | 2 ppb |
| North Warren Muni Authority PA6620028 | 1,749 | 0 | 0 | 1 | 5 ppb |
| Southwest Warren Co Mun Auth PA6620032 | 1,040 | 0 | 0 | 11 | 19.2 ppb |
| Aqua Pa Clarendon PA6620021 | 840 | 0 | 0 | 9 | 2 ppb |
| Pine Grove TWP Water System PA6620029 | 640 | 0 | 0 | 1 | 4 ppb |
| Pleasant Valley MHP PA6620038 | 270 | 0 | 0 | 1 | 2 ppb |
| Wilderness MHP PA6620019 | 200 | 0 | 0 | 1 | 3 ppb |
| Masons Mobile City PA6620036 | 140 | 0 | 0 | 6 | 1 ppb |
| Valley View Village MHP PA6620005 | 55 | 0 | 0 | 1 | 1 ppb |
| Youngsville Mun Waterworks PA6620039 | 1,957 | 0 | 0 | 0 | 3 ppb |
| Sheffield TWP Municipal Auth PA6620031 | 1,075 | 0 | 0 | 0 | 5 ppb |
| Warren State Hospital PA6620034 | 721 | 0 | 0 | 0 | 23.7 ppb |
| West Sheffield Water Assn PA6620007 | 225 | 0 | 0 | 1 | not reported |
| The Valley MHC PA6620043 | 37 | 0 | 0 | 0 | 1,000 ppb |
| Miracle Mountain Ranch PA6620371 | 98 | 0 | 0 | 0 | not reported |
ZIP reports in Warren 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: 16312, 16329, 16352, 16371, 16402, 16405, 16416, 16420, 16436.
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.