CHIEF PLENTY COUPS MUSEUM
PWS ID: MT0042412 · BILLINGS, Montana 59105
Population Served
262
Total Violations
62
Health-Based Violations
22
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 4
- County
- Big Horn
- School/Daycare
- No
- MCL Violations
- 16
- Monitoring Violations
- 40
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 16 | 2000 |
| Groundwater Rule | MR | 15 | 2015 |
| Coliform (TCR) | MR | 12 | 2016 |
| Nitrate-Nitrite | MR | 7 | 2016 |
| Revised Total Coliform Rule | MON | 6 | 2020 |
| Groundwater Rule | TT | 6 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.