County · Montana
Toole County, Montana: drinking water records
This overview covers 7 ZIP codes and 15 community water systems in Toole 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 |
|---|---|---|---|---|---|
| Shelby City of MT0000328 | 3,970 | 60 | 0 | 0 | 2 ppb |
| Oilmont County Water District MT0000587 | 300 | 0 | 0 | 9 | 0 ppb |
| Sweetgrass Water Users Assn MT0000340 | 100 | 0 | 0 | 1 | 15 ppb |
| Camrose Colony MT0004036 | 95 | 0 | 0 | 2 | 0 ppb |
| Devon Water INC MT0000200 | 75 | 0 | 0 | 2 | 0 ppb |
| Sunburst Town of MT0000338 | 459 | 0 | 0 | 0 | 1 ppb |
| Ncmrwa North Shelby MT0005064 | 300 | 0 | 0 | 0 | 0 ppb |
| Kevin Town of MT0000265 | 290 | 0 | 0 | 0 | 12 ppb |
| Galata County Water District MT0000009 | 200 | 0 | 0 | 0 | 0 ppb |
| Rimrock Colony MT0001783 | 124 | 0 | 0 | 0 | 0 ppb |
| Hillside Colony INC MT0001782 | 100 | 0 | 0 | 0 | 0 ppb |
| Nine Mile Co Water and Sewer District MT0005075 | 90 | 0 | 0 | 0 | 2 ppb |
| Big Rose Colony MT0004833 | 75 | 0 | 0 | 0 | 0 ppb |
| Ethridge County Water District MT0004353 | 70 | 0 | 0 | 0 | 0 ppb |
| Ncmrwa Shelby To Ethridge MT0004936 | 70 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Toole 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: 59435, 59466.
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.