RONAN CITY OF
PWS ID: MT0000318 · RONAN, Montana 59864
Population Served
2,483
Total Violations
259
Health-Based Violations
9
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,004
- County
- Lake
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 247
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 9 | 2011 |
| Combined Radium (-226 and -228) | MR | 8 | 2014 |
| Gross Alpha, Excl. Radon and U | MR | 8 | 2014 |
| 1,2,4-Trichlorobenzene | MR | 6 | 2023 |
| Xylenes, Total | MR | 6 | 2023 |
| o-Dichlorobenzene | MR | 6 | 2023 |
| p-Dichlorobenzene | MR | 6 | 2023 |
| Vinyl chloride | MR | 6 | 2023 |
| 1,1-Dichloroethylene | MR | 6 | 2023 |
| trans-1,2-Dichloroethylene | MR | 6 | 2023 |
| 1,2-Dichloroethane | MR | 6 | 2023 |
| 1,1,1-Trichloroethane | MR | 6 | 2023 |
| 1,2-Dichloropropane | MR | 6 | 2023 |
| Trichloroethylene | MR | 6 | 2023 |
| 1,1,2-Trichloroethane | MR | 6 | 2023 |
| Tetrachloroethylene | MR | 6 | 2023 |
| CHLOROBENZENE | MR | 6 | 2023 |
| Toluene | MR | 6 | 2023 |
| Ethylbenzene | MR | 6 | 2023 |
| Styrene | MR | 6 | 2023 |
| DICHLOROMETHANE | MR | 6 | 2023 |
| Carbon tetrachloride | MR | 6 | 2023 |
| Benzene | MR | 6 | 2023 |
| Arsenic | MR | 6 | 2005 |
| Surface Water Treatment Rule | MR | 6 | 2025 |
| cis-1,2-Dichloroethylene | MR | 6 | 2023 |
| Coliform (TCR) | MR | 4 | 2012 |
| BHC-GAMMA | MR | 3 | 2014 |
| Dalapon | MR | 3 | 2014 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.