HILLSIDE COLONY INC
PWS ID: MT0001782 · SWEET GRASS, Montana 59484
Population Served
100
Total Violations
44
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 12
- County
- Toole
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 36
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 16 | 2015 |
| Nitrate-Nitrite | MR | 11 | 2012 |
| Coliform (TCR) | MCL | 4 | 2005 |
| Consumer Confidence Rule | Other | 2 | 2015 |
| Cadmium | MR | 1 | 1981 |
| Fluoride | MR | 1 | 1981 |
| Barium | MR | 1 | 1981 |
| Chromium | MR | 1 | 1981 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 2008 |
| Arsenic | MR | 1 | 1981 |
| Mercury | MR | 1 | 1981 |
| Nitrate | MR | 1 | 1981 |
| Selenium | MR | 1 | 1981 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.