FLATHEAD COUNTY WATER DIST 101
PWS ID: MT0000184 · COLUMBIA FALLS, Montana 59912
Population Served
210
Total Violations
712
Health-Based Violations
49
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 96
- County
- Flathead
- School/Daycare
- No
- MCL Violations
- 41
- Monitoring Violations
- 568
- Treatment Tech Violations
- 8
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 194 | 2016 |
| Consumer Confidence Rule | Other | 95 | 2023 |
| Coliform (TCR) | MCL | 41 | 2015 |
| Lead and Copper Rule | MR | 36 | 2024 |
| Nitrate | MR | 20 | 1999 |
| Nitrate-Nitrite | MR | 19 | 2015 |
| E. COLI | MR | 13 | 2015 |
| Dalapon | MR | 11 | 2011 |
| Picloram | MR | 11 | 2011 |
| Dinoseb | MR | 11 | 2011 |
| 2,4,5-TP | MR | 11 | 2011 |
| Pentachlorophenol | MR | 11 | 2011 |
| 2,4-D | MR | 9 | 2011 |
| Endrin | MR | 8 | 1999 |
| Methoxychlor | MR | 8 | 1999 |
| Toxaphene | MR | 8 | 1999 |
| Endothall | MR | 8 | 1999 |
| Di(2-ethylhexyl) adipate | MR | 8 | 1999 |
| Di(2-ethylhexyl) phthalate | MR | 8 | 1999 |
| Aldicarb sulfoxide | MR | 8 | 1999 |
| Aldicarb | MR | 8 | 1999 |
| Atrazine | MR | 8 | 1999 |
| 2,3,7,8-TCDD | MR | 8 | 1999 |
| Heptachlor | MR | 8 | 1999 |
| Heptachlor epoxide | MR | 8 | 1999 |
| HEXACHLOROBENZENE | MR | 8 | 1999 |
| ETHYLENE DIBROMIDE | MR | 8 | 1999 |
| Diquat | MR | 8 | 1999 |
| OXAMYL | MR | 8 | 1999 |
| Simazine | MR | 8 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.