ROCKY MOUNTAIN BUILDING COMPANY
PWS ID: MT0003460 · HAMILTON, Montana 59840
Population Served
75
Total Violations
82
Health-Based Violations
2
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Ravalli
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 76
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 19 | 2009 |
| Lead and Copper Rule | MR | 19 | 2020 |
| Nitrate-Nitrite | MR | 6 | 2011 |
| Coliform (TCR) | MCL | 2 | 1995 |
| Di(2-ethylhexyl) adipate | MR | 1 | 1996 |
| Benzo(a)pyrene | MR | 1 | 1996 |
| Simazine | MR | 1 | 1996 |
| Picloram | MR | 1 | 1996 |
| OXAMYL | MR | 1 | 1996 |
| Dinoseb | MR | 1 | 1996 |
| Dalapon | MR | 1 | 1996 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 1996 |
| Heptachlor epoxide | MR | 1 | 1996 |
| Heptachlor | MR | 1 | 1996 |
| Carbofuran | MR | 1 | 1996 |
| Atrazine | MR | 1 | 1996 |
| Aldicarb sulfone | MR | 1 | 1996 |
| Aldicarb | MR | 1 | 1996 |
| LASSO | MR | 1 | 1996 |
| 2,4,5-TP | MR | 1 | 1996 |
| 2,4-D | MR | 1 | 1996 |
| Toxaphene | MR | 1 | 1996 |
| BHC-GAMMA | MR | 1 | 1996 |
| Endrin | MR | 1 | 1996 |
| Antimony, Total | MR | 1 | 1996 |
| Selenium | MR | 1 | 1996 |
| Cadmium | MR | 1 | 1996 |
| Chlordane | MR | 1 | 1996 |
| Chromium | MR | 1 | 1996 |
| Fluoride | MR | 1 | 1996 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.