County · Montana
Lincoln County, Montana: drinking water records
This overview covers 7 ZIP codes and 18 community water systems in Lincoln County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Libby City of MT0000274 | 4,892 | 120 | 0 | 4 | 2 ppb |
| Wilderness Plateau Water and Sewer Dist MT0002985 | 208 | 0 | 0 | 1 | 2 ppb |
| Pinewood Village MT0000275 | 160 | 0 | 0 | 1 | 4 ppb |
| Carpenter Lake HOA MT0003694 | 65 | 0 | 0 | 1 | 1 ppb |
| Rivers Edge Mobile Park Libby MT0000553 | 60 | 0 | 0 | 1 | 0 ppb |
| Troy City of MT0000348 | 2,100 | 0 | 0 | 0 | 2 ppb |
| Eureka Town of MT0000210 | 1,995 | 0 | 0 | 0 | 1 ppb |
| Indian Springs Ranch Sub MT0004611 | 455 | 0 | 0 | 0 | 0 ppb |
| Emkayan Village Co Water and Sewer Dist MT0000540 | 160 | 0 | 0 | 0 | 2 ppb |
| Rexford Town of MT0000315 | 160 | 0 | 0 | 0 | 0 ppb |
| Angel Island Subdivision MT0000582 | 150 | 0 | 0 | 0 | 1 ppb |
| Barnaby Lake HOA MT0003736 | 75 | 0 | 0 | 0 | 1 ppb |
| Posts Trailer Court MT0000554 | 45 | 0 | 0 | 0 | 1 ppb |
| Creekside Motel RV and Trlr Pk MT0000530 | 35 | 0 | 0 | 0 | 3 ppb |
| Johnsons Mobile Home Park MT0000529 | 35 | 0 | 0 | 0 | 5 ppb |
| Crystal Lake Subdivision HOA MT0001145 | 34 | 0 | 0 | 0 | 2 ppb |
| Wilderness Club the MT0004748 | 440 | 0 | 0 | 0 | not reported |
| Libby Creek Mobile Park Llc-Unapproved MT0005241 | 35 | 0 | 0 | 0 | not reported |
ZIP reports in Lincoln 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: 59934.
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.