County · Montana
Ravalli County, Montana: drinking water records
This overview covers 9 ZIP codes and 23 community water systems in Ravalli County. It also stands in for 2 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 |
|---|---|---|---|---|---|
| Hamilton City of MT0000234 | 5,660 | 240 | 1 | 0 | 1 ppb |
| Darby Town of MT0000195 | 850 | 0 | 0 | 1 | 0 ppb |
| Pinesdale Town of MT0002926 | 800 | 240 | 0 | 0 | 1 ppb |
| Mountain Shadows Estates Stevensville MT0002132 | 55 | 0 | 0 | 1 | 1 ppb |
| Stevensville Town of MT0000335 | 2,090 | 0 | 0 | 0 | 0 ppb |
| Trapper Creek Job Corps MT0062207 | 275 | 0 | 0 | 0 | 6 ppb |
| Kootenai Creek Village MT0004241 | 175 | 0 | 0 | 0 | 1 ppb |
| Stock Farm the MT0003982 | 150 | 0 | 0 | 0 | 2 ppb |
| Daly Estates Subdivision MT0004517 | 123 | 0 | 0 | 0 | 0 ppb |
| Wild Flower HOA, the MT0004533 | 120 | 0 | 0 | 0 | 1 ppb |
| Centennial Homeowner'S Association, INC MT0004438 | 115 | 0 | 0 | 0 | 3 ppb |
| Westana Mobile Manor Hamilton MT0000634 | 90 | 0 | 0 | 0 | 0 ppb |
| Antigone Acres HOA MT0003003 | 85 | 0 | 0 | 0 | 0 ppb |
| White Bird Community the MT0000506 | 82 | 0 | 0 | 0 | 2 ppb |
| Bluebird Mb Hm Park Hamilton MT0001083 | 75 | 0 | 0 | 0 | 0 ppb |
| Big Sky Trailer Ct Hamilton MT0000504 | 70 | 0 | 0 | 0 | 5 ppb |
| Sawtooth Villa MT0003284 | 70 | 0 | 0 | 0 | 1 ppb |
| Forest View HOA MT0003594 | 65 | 0 | 0 | 0 | 6 ppb |
| Ponderosa Mobile Home Park MT0002131 | 60 | 0 | 0 | 0 | 10 ppb |
| Hamilton Mobile Village MT0001079 | 53 | 0 | 0 | 0 | 0 ppb |
| Honey Lane Community MT0001080 | 50 | 0 | 0 | 0 | 4 ppb |
| Bitterroot Pines Tr Ct Florence MT0002128 | 45 | 0 | 0 | 0 | 2 ppb |
| Wards Cove Water Users MT0003277 | 45 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Ravalli 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: 59827, 59871.
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.