THREE FORKS CITY OF
PWS ID: MT0000343 · THREE FORKS, Montana 59752
Population Served
1,900
Total Violations
162
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 940
- County
- Gallatin
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 152
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nickel | MR | 9 | 2002 |
| Beryllium, Total | MR | 9 | 2002 |
| Thallium, Total | MR | 9 | 2002 |
| Antimony, Total | MR | 9 | 2002 |
| Arsenic | MR | 4 | 2002 |
| Coliform (TCR) | MR | 4 | 2005 |
| Endrin | MR | 4 | 2002 |
| Methoxychlor | MR | 4 | 2002 |
| Dalapon | MR | 4 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 4 | 2002 |
| OXAMYL | MR | 4 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2002 |
| Carbofuran | MR | 4 | 2002 |
| Aldicarb | MR | 4 | 2002 |
| Atrazine | MR | 4 | 2002 |
| Heptachlor epoxide | MR | 4 | 2002 |
| HEXACHLOROBENZENE | MR | 4 | 2002 |
| Benzo(a)pyrene | MR | 4 | 2002 |
| Pentachlorophenol | MR | 4 | 2002 |
| Chlordane | MR | 4 | 2002 |
| Picloram | MR | 4 | 2002 |
| Hexachlorocyclopentadiene | MR | 4 | 2002 |
| Aldicarb sulfone | MR | 4 | 2002 |
| LASSO | MR | 4 | 2002 |
| Heptachlor | MR | 4 | 2002 |
| 2,4-D | MR | 4 | 2002 |
| 2,4,5-TP | MR | 4 | 2002 |
| Arsenic | MCL | 4 | 2019 |
| Dinoseb | MR | 4 | 2002 |
| BHC-GAMMA | MR | 4 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.