COLSTRIP CITY OF
PWS ID: MT0000180 · COLSTRIP, Montana 59323
Population Served
2,350
Total Violations
133
Health-Based Violations
7
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 913
- County
- Rosebud
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 117
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| CARBON, TOTAL | MR | 18 | 2004 |
| Coliform (TCR) | MR | 16 | 2008 |
| Surface Water Treatment Rule | MR | 9 | 2024 |
| Arsenic | MR | 6 | 1999 |
| Antimony, Total | MR | 5 | 2003 |
| Selenium | MR | 5 | 2003 |
| Mercury | MR | 5 | 2003 |
| Chromium | MR | 5 | 2003 |
| Cadmium | MR | 5 | 2003 |
| Barium | MR | 5 | 2003 |
| Thallium, Total | MR | 5 | 2003 |
| Beryllium, Total | MR | 5 | 2003 |
| Nickel | MR | 5 | 2003 |
| Surface Water Treatment Rule | TT | 4 | 2024 |
| Lead and Copper Rule | MR | 3 | 2001 |
| Fluoride | MR | 3 | 2003 |
| Revised Total Coliform Rule | MON | 3 | 2022 |
| TTHM | MCL | 3 | 2024 |
| Nitrate-Nitrite | MR | 3 | 2000 |
| Asbestos | MR | 3 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2023 |
| TTHM | MR | 3 | 2023 |
| Nitrate | MR | 2 | 1996 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.