JOLIET TOWN OF
PWS ID: MT0000256 · JOLIET, Montana 59041
Population Served
600
Total Violations
244
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 300
- County
- Carbon
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 237
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate-Nitrite | MR | 15 | 2005 |
| Arsenic | MR | 13 | 2011 |
| Barium | MR | 10 | 2011 |
| Cadmium | MR | 10 | 2011 |
| Chromium | MR | 10 | 2011 |
| Selenium | MR | 10 | 2011 |
| Mercury | MR | 10 | 2011 |
| Fluoride | MR | 10 | 2011 |
| Nickel | MR | 9 | 2011 |
| Antimony, Total | MR | 9 | 2011 |
| Thallium, Total | MR | 9 | 2011 |
| Beryllium, Total | MR | 9 | 2011 |
| Gross Alpha, Excl. Radon and U | MR | 9 | 2008 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2021 |
| Consumer Confidence Rule | Other | 6 | 2020 |
| TTHM | MR | 6 | 2021 |
| Lead and Copper Rule | MR | 4 | 2025 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1999 |
| cis-1,2-Dichloroethylene | MR | 3 | 1999 |
| DICHLOROMETHANE | MR | 3 | 1999 |
| o-Dichlorobenzene | MR | 3 | 1999 |
| p-Dichlorobenzene | MR | 3 | 1999 |
| Vinyl chloride | MR | 3 | 1999 |
| trans-1,2-Dichloroethylene | MR | 3 | 1999 |
| 1,1,1-Trichloroethane | MR | 3 | 1999 |
| 1,2-Dichloropropane | MR | 3 | 1999 |
| Trichloroethylene | MR | 3 | 1999 |
| 1,1,2-Trichloroethane | MR | 3 | 1999 |
| CHLOROBENZENE | MR | 3 | 1999 |
| Benzene | MR | 3 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.