County · New York
Lewis County, New York: drinking water records
This overview covers 16 ZIP codes and 15 community water systems in Lewis County. It also stands in for 7 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 |
|---|---|---|---|---|---|
| Lowville Village NY2402365 | 4,000 | 120 | 0 | 20 | 1.5 ppb |
| Lowville (T) WD #1 NY2430039 | 350 | 0 | 0 | 19 | 3.3 ppb |
| Croghan Village NY2402362 | 900 | 0 | 0 | 0 | 1.1 ppb |
| Copenhagen Village NY2402361 | 850 | 0 | 0 | 0 | 4.5 ppb |
| Lyons Falls Village NY2402366 | 850 | 0 | 0 | 0 | 0 ppb |
| Port Leyden Village NY2402368 | 820 | 0 | 0 | 0 | 9.5 ppb |
| Beaver Falls Water District NY2402358 | 782 | 0 | 0 | 0 | 5.7 ppb |
| Harrisville (Diana WD 1) NY2402364 | 700 | 0 | 0 | 0 | 5.5 ppb |
| Turin Village NY2402369 | 350 | 0 | 0 | 0 | 4.5 ppb |
| Castorland Village NY2402359 | 320 | 0 | 0 | 0 | 1.9 ppb |
| Constableville Village NY2402360 | 310 | 0 | 0 | 0 | 4.7 ppb |
| Martinsburg Water District NY2402367 | 310 | 0 | 0 | 0 | 1.5 ppb |
| Glenfield Water District NY2402363 | 300 | 0 | 0 | 0 | 1.7 ppb |
| Watson Town WD 4 NY2430145 | 300 | 0 | 0 | 0 | 2.1 ppb |
| Denmark WD 1 NY2430060 | 350 | 0 | 0 | 0 | not reported |
ZIP reports in Lewis 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: 13305, 13312, 13345, 13489, 13620, 13648, 13665.
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.