PIONEER SCHOOL DIST 41
PWS ID: MT0001735 · BILLINGS, Montana 59105
Population Served
70
Total Violations
180
Health-Based Violations
25
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- State
- Connections
- 2
- County
- Yellowstone
- School/Daycare
- Yes
- MCL Violations
- 23
- Monitoring Violations
- 155
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 129 | 2015 |
| Coliform (TCR) | MCL | 23 | 2014 |
| Coliform (TCR) | MR | 11 | 2015 |
| Nitrate-Nitrite | MR | 3 | 2011 |
| DICHLOROMETHANE | MR | 3 | 2011 |
| Nitrate | MR | 3 | 1993 |
| E. COLI | MR | 3 | 2013 |
| Revised Total Coliform Rule | MON | 3 | 2018 |
| Lead and Copper Rule | TT | 2 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.