EAST HELENA CITY OF
PWS ID: MT0000196 · EAST HELENA, Montana 59635
Population Served
2,114
Total Violations
44
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 897
- County
- Lewis and Clark
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 27
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 11 | 2015 |
| Consumer Confidence Rule | Other | 7 | 2021 |
| Lead and Copper Rule | TT | 3 | 2022 |
| Revised Total Coliform Rule | MON | 3 | 2025 |
| Nickel | MR | 1 | 1994 |
| Fluoride | MR | 1 | 1994 |
| Mercury | MR | 1 | 1994 |
| Chromium | MR | 1 | 1994 |
| Cadmium | MR | 1 | 1994 |
| Barium | MR | 1 | 1994 |
| Arsenic | MR | 1 | 1994 |
| Antimony, Total | MR | 1 | 1994 |
| Thallium, Total | MR | 1 | 1994 |
| Selenium | MR | 1 | 1994 |
| Nitrate | MR | 1 | 1993 |
| Beryllium, Total | MR | 1 | 1994 |
| CYANIDE | MR | 1 | 1994 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.