BOULDER CITY OF
PWS ID: MT0000158 · BOULDER, Montana 59632
Population Served
1,400
Total Violations
376
Health-Based Violations
37
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 563
- County
- Jefferson
- School/Daycare
- No
- MCL Violations
- 29
- Monitoring Violations
- 339
- Treatment Tech Violations
- 8
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 193 | 2007 |
| Coliform (TCR) | MCL | 29 | 2006 |
| Cadmium | MR | 12 | 2011 |
| Fluoride | MR | 12 | 2011 |
| Mercury | MR | 12 | 2011 |
| Nickel | MR | 12 | 2011 |
| Antimony, Total | MR | 12 | 2011 |
| Thallium, Total | MR | 12 | 2011 |
| Selenium | MR | 12 | 2011 |
| Barium | MR | 12 | 2011 |
| Chromium | MR | 12 | 2011 |
| Beryllium, Total | MR | 12 | 2011 |
| Coliform (TCR) | MR | 8 | 2005 |
| TTHM | MR | 6 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2024 |
| Lead and Copper Rule | TT | 4 | 2006 |
| Surface Water Treatment Rule | TT | 4 | 2022 |
| Revised Total Coliform Rule | MON | 3 | 2018 |
| Asbestos | MR | 3 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.