TEN MILE AND PLEASANT VALLEY WUA
PWS ID: MT0002005 · HELENA, Montana 59604
Population Served
750
Total Violations
460
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 310
- County
- Lewis and Clark
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 429
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 39 | 2024 |
| Consumer Confidence Rule | Other | 19 | 2023 |
| Thallium, Total | MR | 9 | 2011 |
| 1,2,4-Trichlorobenzene | MR | 9 | 2021 |
| Xylenes, Total | MR | 9 | 2021 |
| Vinyl chloride | MR | 9 | 2021 |
| trans-1,2-Dichloroethylene | MR | 9 | 2021 |
| 1,1,1-Trichloroethane | MR | 9 | 2021 |
| Carbon tetrachloride | MR | 9 | 2021 |
| 1,2-Dichloropropane | MR | 9 | 2021 |
| Trichloroethylene | MR | 9 | 2021 |
| 1,1,2-Trichloroethane | MR | 9 | 2021 |
| Tetrachloroethylene | MR | 9 | 2021 |
| Ethylbenzene | MR | 9 | 2021 |
| Styrene | MR | 9 | 2021 |
| E. COLI | MR | 9 | 2014 |
| cis-1,2-Dichloroethylene | MR | 9 | 2021 |
| DICHLOROMETHANE | MR | 9 | 2021 |
| o-Dichlorobenzene | MR | 9 | 2021 |
| 1,1-Dichloroethylene | MR | 9 | 2021 |
| CHLOROBENZENE | MR | 9 | 2021 |
| Benzene | MR | 9 | 2021 |
| p-Dichlorobenzene | MR | 9 | 2021 |
| 1,2-Dichloroethane | MR | 9 | 2021 |
| Toluene | MR | 9 | 2021 |
| 2,4,5-TP | MR | 8 | 2011 |
| Arsenic | MR | 7 | 2011 |
| Fluoride | MR | 6 | 2011 |
| Mercury | MR | 6 | 2011 |
| Dalapon | MR | 6 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.