ST IGNATIUS TOWN OF
PWS ID: MT0001740 · ST IGNATIUS, Montana 59865
Population Served
700
Total Violations
168
Health-Based Violations
33
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 291
- County
- Lake
- School/Daycare
- No
- MCL Violations
- 16
- Monitoring Violations
- 129
- Treatment Tech Violations
- 17
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Groundwater Rule | TT | 17 | 2016 |
| Coliform (TCR) | MCL | 16 | 2010 |
| Coliform (TCR) | MR | 9 | 2011 |
| Lead and Copper Rule | MR | 8 | 2022 |
| Groundwater Rule | MR | 7 | 2025 |
| Consumer Confidence Rule | Other | 6 | 2012 |
| TTHM | MR | 6 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2019 |
| Gross Alpha, Excl. Radon and U | MR | 5 | 2016 |
| Methoxychlor | MR | 3 | 2016 |
| Toxaphene | MR | 3 | 2016 |
| OXAMYL | MR | 3 | 2016 |
| Simazine | MR | 3 | 2016 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2016 |
| Picloram | MR | 3 | 2016 |
| Dinoseb | MR | 3 | 2016 |
| Aldicarb sulfone | MR | 3 | 2016 |
| Carbofuran | MR | 3 | 2016 |
| Aldicarb | MR | 3 | 2016 |
| LASSO | MR | 3 | 2016 |
| Heptachlor | MR | 3 | 2016 |
| 2,4-D | MR | 3 | 2016 |
| 2,4,5-TP | MR | 3 | 2016 |
| HEXACHLOROBENZENE | MR | 3 | 2016 |
| Pentachlorophenol | MR | 3 | 2016 |
| Chlordane | MR | 3 | 2016 |
| Combined Radium (-226 and -228) | MR | 3 | 2016 |
| E. COLI | MR | 3 | 2024 |
| Heptachlor epoxide | MR | 3 | 2016 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.