County · New York
Jefferson County, New York: drinking water records
This overview covers 38 ZIP codes and 57 community water systems in Jefferson County. It also stands in for 17 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 |
|---|---|---|---|---|---|
| Fort Drum NY2212214 | 34,000 | 180 | 6 | 2 | 0.4 ppb |
| Watertown City NY2202346 | 27,861 | 120 | 2 | 13 | 6.3 ppb |
| Carthage Village NY2202334 | 3,600 | 120 | 0 | 6 | 0 ppb |
| Leray Town WD 1, 2, 4 NY2221206 | 7,140 | 240 | 1 | 0 | 3.3 ppb |
| Pamelia Town WD 4 & 5 NY2230066 | 1,857 | 0 | 0 | 19 | 4.1 ppb |
| Philadelphia Village NY2202341 | 1,800 | 0 | 0 | 1 | 1.5 ppb |
| West Carthage Village NY2202349 | 1,734 | 0 | 0 | 7 | 4.6 ppb |
| Dexter Village NY2202337 | 1,100 | 0 | 0 | 7 | 3 ppb |
| Watertown Town WD 3 & 4 & 5 NY2202352 | 750 | 0 | 0 | 8 | 3 ppb |
| Hounsfield WD 2 NY2230094 | 725 | 0 | 0 | 2 | 3.3 ppb |
| Champion WD 2, 4 & 5 NY2230022 | 650 | 0 | 0 | 3 | 1.1 ppb |
| Watertown Town WD 1 & 2 NY2202348 | 600 | 0 | 0 | 2 | 3 ppb |
| Hounsfield WD 1, 5 NY2221870 | 480 | 0 | 0 | 7 | 2.4 ppb |
| Wilna T WD 1 NY2230095 | 240 | 0 | 0 | 15 | 4.6 ppb |
| Southside Water INC. NY2221333 | 195 | 0 | 0 | 2 | 3 ppb |
| Pamelia Town WD #2 NY2230075 | 150 | 0 | 0 | 11 | 3.1 ppb |
| Cold Creek Studios NY2202257 | 90 | 0 | 0 | 1 | 0 ppb |
| Danc (Watertown / Ft. Drum) NY2230013 | 0 | 0 | 0 | 3 | 3 ppb |
| Cape Vincent Town WD 1 & 5 NY2230018 | 2,600 | 0 | 0 | 0 | 3.7 ppb |
| Sackets Harbor Village NY2202343 | 2,200 | 0 | 0 | 0 | 1.2 ppb |
| Clayton Village NY2202335 | 2,100 | 0 | 0 | 0 | 2.1 ppb |
| Adams Village NY2202328 | 2,000 | 0 | 0 | 0 | 4.3 ppb |
| Alexandria Bay Village NY2202329 | 1,900 | 0 | 0 | 0 | 2.6 ppb |
| Black River Village NY2202331 | 1,600 | 0 | 0 | 0 | 6.3 ppb |
| Cape Vincent Village NY2202333 | 1,500 | 0 | 0 | 0 | 12.7 ppb |
ZIP reports in Jefferson 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: 13606, 13612, 13615, 13622, 13628, 13632, 13636, 13638, 13650, 13651, 13659, 13674, 13675, 13679, 13691, 13692, 13693.
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.