CUSTER SCHOOL DIST NO 15
PWS ID: MT0001748 · CUSTER, Montana 59024
Population Served
100
Total Violations
87
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- State
- Connections
- 1
- County
- Yellowstone
- School/Daycare
- Yes
- MCL Violations
- 9
- Monitoring Violations
- 77
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 29 | 2024 |
| Coliform (TCR) | MR | 20 | 2009 |
| Nitrate-Nitrite | MCL | 8 | 2016 |
| Revised Total Coliform Rule | MON | 7 | 2017 |
| TTHM | MR | 6 | 2020 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2020 |
| Nitrate-Nitrite | MR | 6 | 2017 |
| Nitrate | MR | 3 | 1997 |
| Fluoride | MCL | 1 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.