PIEGAN BORDER STATION
PWS ID: MT0003334 · HELENA, Montana 59626
Population Served
94
Total Violations
1,081
Health-Based Violations
7
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 21
- County
- Glacier
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 1,053
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 257 | 2012 |
| TTHM | MR | 34 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 34 | 2025 |
| Lead and Copper Rule | MR | 28 | 2025 |
| Coliform (TCR) | MR | 24 | 2012 |
| Combined Radium (-226 and -228) | MR | 21 | 2012 |
| Gross Alpha, Excl. Radon and U | MR | 21 | 2012 |
| Consumer Confidence Rule | Other | 19 | 2022 |
| Endrin | MR | 18 | 2013 |
| Methoxychlor | MR | 18 | 2013 |
| Di(2-ethylhexyl) adipate | MR | 18 | 2013 |
| OXAMYL | MR | 18 | 2013 |
| Simazine | MR | 18 | 2013 |
| Di(2-ethylhexyl) phthalate | MR | 18 | 2013 |
| Dinoseb | MR | 18 | 2013 |
| Aldicarb sulfone | MR | 18 | 2013 |
| Aldicarb | MR | 18 | 2013 |
| Atrazine | MR | 18 | 2013 |
| LASSO | MR | 18 | 2013 |
| Heptachlor epoxide | MR | 18 | 2013 |
| Chlordane | MR | 18 | 2013 |
| Dalapon | MR | 18 | 2013 |
| Picloram | MR | 18 | 2013 |
| Hexachlorocyclopentadiene | MR | 18 | 2013 |
| Aldicarb sulfoxide | MR | 18 | 2013 |
| Carbofuran | MR | 18 | 2013 |
| Heptachlor | MR | 18 | 2013 |
| 2,4,5-TP | MR | 18 | 2013 |
| HEXACHLOROBENZENE | MR | 18 | 2013 |
| Benzo(a)pyrene | MR | 18 | 2013 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.