WILSALL WATER DISTRICT
Montana — Community Water System — PWSID: MT0000362
System Information
| PWSID | MT0000362 |
| System Name | WILSALL WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Ground Water Under Influence |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | WILSALL |
| ZIP Code | 59086 |
| Address | PO BOX 388 |
| Organization | POPE, DESIREE |
| Phone | — |
Population & Service
| Population Served | 250 |
| Service Connections | 130 |
Drinking Water Violations (162)
This water system has 162 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Oct 31, 2025 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2025 | — | |
| Oct 1, 2025 | Oct 31, 2025 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2025 | — | |
| Oct 1, 2025 | Oct 31, 2025 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | TT | Yes | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | TT | Yes | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | MR | No | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | TT | Yes | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | MR | No | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Sep 1, 2025 | Sep 30, 2025 | MR | No | No | — | — | — | Resolved | Sep 30, 2025 | — | |
| Aug 1, 2025 | Aug 31, 2025 | MR | No | No | — | — | — | Resolved | Aug 31, 2025 | — | |
| Aug 1, 2025 | Aug 31, 2025 | MR | No | No | — | — | — | Resolved | Aug 31, 2025 | — | |
| Aug 1, 2025 | Aug 31, 2025 | MR | No | No | — | — | — | Resolved | Aug 31, 2025 | — | |
| Oct 3, 2019 | — | TT | Yes | No | — | — | — | Addressed | — | — | |
| Oct 3, 2019 | — | TT | Yes | No | — | — | — | Addressed | — | — | |
| Oct 3, 2019 | — | TT | Yes | No | — | — | — | Addressed | — | — | |
| Oct 3, 2019 | — | TT | Yes | No | — | — | — | Addressed | — | — | |
| Oct 3, 2019 | — | TT | Yes | No | — | — | — | Addressed | — | — | |
| Apr 1, 2018 | Jun 30, 2018 | MCL | Yes | No | 10.6 MG/L | — | 10 | Resolved | Jan 17, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MCL | Yes | No | 10.6 MG/L | — | 10 | Resolved | Jan 17, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MCL | Yes | No | 10.6 MG/L | — | 10 | Resolved | Jan 17, 2018 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jul 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Jan 1, 2011 | — | MR | No | No | — | TT | — | Resolved | Apr 12, 2011 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | — | MR | No | No | — | TT | — | Resolved | Apr 12, 2011 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 7 MFL | — | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Oct 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Oct 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Nov 3, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | — | MR | No | No | — | TT | — | Resolved | Nov 4, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | — | MR | No | No | — | TT | — | Resolved | Nov 4, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | — | MR | No | No | — | TT | — | Resolved | Nov 4, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2008 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.