TWO BUTTES WATER USERS ASSN
PWS ID: MT0000580 · FORT SHAW, Montana 59443
Population Served
525
Total Violations
119
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 126
- County
- Cascade
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 75
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 30 | 2017 |
| Consumer Confidence Rule | Other | 24 | 2017 |
| Coliform (TCR) | MR | 17 | 2012 |
| Lead and Copper Rule | MR | 11 | 2014 |
| Coliform (TCR) | MCL | 5 | 2002 |
| Nitrate-Nitrite | MR | 4 | 2011 |
| Asbestos | MR | 3 | 2011 |
| E. COLI | MR | 3 | 2017 |
| Combined Radium (-226 and -228) | MCL | 3 | 2002 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| TTHM | MR | 3 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2019 |
| Nitrate | MR | 1 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.