TRI COUNTY WATER DISTRICT
Montana - Community Water System - PWSID: MT0002912
System Information
| PWSID | MT0002912 |
| System Name | TRI COUNTY WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Dec 30, 1983 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | POWER |
| ZIP Code | 59468 |
| Address | 1002 4TH LANE NE |
| Organization | GRILLEY, CLIFTON H |
| Phone | - |
Population & Service
| Population Served | 470 |
| Service Connections | 177 |
Drinking Water Violations (215)
This water system has 215 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 30, 2024 | - | MR | No | No | - | TT | - | Resolved | Feb 4, 2025 | - | |
| Dec 30, 2024 | - | MR | No | No | - | TT | - | Resolved | Feb 4, 2025 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 31, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Oct 22, 2025 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2018 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2018 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Aug 31, 2018 | - | |
| Dec 30, 2014 | - | MR | No | No | - | TT | - | Resolved | Feb 3, 2015 | - | |
| Dec 30, 2014 | - | MR | No | No | - | TT | - | Resolved | Feb 3, 2015 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.006 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.004 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | - | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 2 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 4.0 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 15 pCi/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Dec 31, 2016 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2012 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2011 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2010 | - |
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.