County · Montana
Park County, Montana: drinking water records
This overview covers 9 ZIP codes and 16 community water systems in Park 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 |
|---|---|---|---|---|---|
| Livingston City of MT0000573 | 7,500 | 360 | 0 | 0 | 2 ppb |
| Wilsall Water District MT0000362 | 250 | 0 | 0 | 4 | 2 ppb |
| Gardiner Park Co Water Dist MT0000224 | 700 | 0 | 0 | 0 | 2 ppb |
| Clyde Park Water Dept MT0000178 | 300 | 0 | 0 | 0 | 2.5 ppb |
| Cooke City Water District MT0000187 | 300 | 0 | 0 | 0 | 2 ppb |
| East Gate Work Camp MT0003440 | 208 | 0 | 0 | 0 | 0 ppb |
| Golden Age Village MT0003313 | 180 | 0 | 0 | 0 | 1 ppb |
| Cinnabar the MT0001557 | 175 | 0 | 0 | 0 | 15 ppb |
| Avalon Subdivision MT0004802 | 135 | 0 | 0 | 0 | 0.5 ppb |
| Windmill Trailer Park Well 2 MT0000475 | 125 | 0 | 0 | 0 | 0 ppb |
| Windmill Trailer Park Well 1 MT0000474 | 110 | 0 | 0 | 0 | 2 ppb |
| Ranch Headquarters MT0003199 | 85 | 0 | 0 | 0 | 0 ppb |
| Big Spur Tr Ct MT0001599 | 65 | 0 | 0 | 0 | 37 ppb |
| Sphinx Mountain Mb Hm Pk MT0003755 | 52 | 0 | 0 | 0 | 0 ppb |
| Sleeping Giant Community INC MT0000038 | 50 | 0 | 0 | 0 | 1 ppb |
| Buffalo Ranch Water Company MT0004047 | 33 | 0 | 0 | 0 | not reported |
ZIP reports in Park 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: 59065, 59081, 59082.
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.