County · Montana
Wheatland County, Montana: drinking water records
This overview covers 4 ZIP codes and 8 community water systems in Wheatland County. It also stands in for 0 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 |
|---|---|---|---|---|---|
| Harlowton City of MT0000240 | 1,050 | 0 | 0 | 0 | 2 ppb |
| Martinsdale Colony MT0000445 | 150 | 0 | 0 | 0 | 0 ppb |
| Judith Gap Town of MT0000258 | 126 | 0 | 0 | 0 | 0 ppb |
| Swan Lake Estates MO1041186 | 115 | 0 | 0 | 0 | 1.9 ppb |
| Springwater Colony MT0000719 | 100 | 0 | 0 | 0 | 1 ppb |
| Duncan Ranch Colony MT0000418 | 96 | 0 | 0 | 0 | 0 ppb |
| Two Dot Water Users Company MT0000586 | 50 | 0 | 0 | 0 | 3 ppb |
| Cmrwa Musselshell Judith Rural Water Sys MT0005109 | 1,100 | 0 | 0 | 0 | not reported |
ZIP reports in Wheatland County
No ZIP report in this county is published yet.
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.