BARNETT WATER USERS SYSTEM
PWS ID: MT0003183 · HELENA, Montana 59602
Population Served
70
Total Violations
332
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 29
- County
- Lewis and Clark
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 317
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 14 | 2024 |
| Coliform (TCR) | MCL | 11 | 2008 |
| Xylenes, Total | MR | 7 | 2011 |
| trans-1,2-Dichloroethylene | MR | 7 | 2011 |
| 1,2-Dichloroethane | MR | 7 | 2011 |
| Carbon tetrachloride | MR | 7 | 2011 |
| Trichloroethylene | MR | 7 | 2011 |
| Arsenic | MR | 7 | 2011 |
| Toluene | MR | 7 | 2011 |
| Styrene | MR | 7 | 2011 |
| DICHLOROMETHANE | MR | 7 | 2011 |
| Vinyl chloride | MR | 7 | 2011 |
| 1,1-Dichloroethylene | MR | 7 | 2011 |
| 1,2-Dichloropropane | MR | 7 | 2011 |
| Tetrachloroethylene | MR | 7 | 2011 |
| Benzene | MR | 7 | 2011 |
| CHLOROBENZENE | MR | 7 | 2011 |
| p-Dichlorobenzene | MR | 7 | 2011 |
| 1,1,2-Trichloroethane | MR | 7 | 2011 |
| 1,1,1-Trichloroethane | MR | 7 | 2011 |
| o-Dichlorobenzene | MR | 7 | 2011 |
| 1,2,4-Trichlorobenzene | MR | 7 | 2011 |
| Coliform (TCR) | MR | 7 | 2013 |
| cis-1,2-Dichloroethylene | MR | 7 | 2011 |
| Ethylbenzene | MR | 7 | 2011 |
| Chromium | MR | 6 | 2014 |
| Fluoride | MR | 6 | 2014 |
| Nickel | MR | 6 | 2014 |
| Thallium, Total | MR | 6 | 2014 |
| Selenium | MR | 6 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.