CARDWELL SCHOOL DIST 16 AND 31
PWS ID: MT0001398 · CARDWELL, Montana 59721
Population Served
63
Total Violations
125
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- State
- Connections
- 1
- County
- Jefferson
- School/Daycare
- Yes
- MCL Violations
- 2
- Monitoring Violations
- 115
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 24 | 2012 |
| Lead and Copper Rule | MR | 12 | 2025 |
| TTHM | MR | 12 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2019 |
| Revised Total Coliform Rule | MON | 9 | 2019 |
| E. COLI | MR | 5 | 2013 |
| Nitrate-Nitrite | MR | 4 | 2017 |
| Cadmium | MR | 4 | 2014 |
| Nitrate | MR | 3 | 1997 |
| Arsenic | MR | 3 | 2014 |
| Barium | MR | 3 | 2014 |
| Chromium | MR | 3 | 2014 |
| Fluoride | MR | 3 | 2014 |
| Mercury | MR | 3 | 2014 |
| Nickel | MR | 3 | 2014 |
| Antimony, Total | MR | 3 | 2014 |
| Beryllium, Total | MR | 3 | 2014 |
| Thallium, Total | MR | 3 | 2014 |
| Selenium | MR | 3 | 2014 |
| Revised Total Coliform Rule | RPT | 3 | 2018 |
| Revised Total Coliform Rule | TT | 3 | 2024 |
| Coliform (TCR) | MCL | 2 | 1992 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.