HARLOWTON CITY OF
PWS ID: MT0000240 · HARLOWTON, Montana 59036
Population Served
1,050
Total Violations
118
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 573
- County
- Wheatland
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 94
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 60 | 2006 |
| Consumer Confidence Rule | Other | 17 | 2025 |
| Nitrate-Nitrite | MR | 9 | 2009 |
| Arsenic | MR | 8 | 2008 |
| Lead and Copper Rule | TT | 6 | 1999 |
| Revised Total Coliform Rule | MON | 4 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2004 |
| TTHM | MR | 3 | 2004 |
| Mercury | MR | 1 | 1984 |
| Nitrate | MR | 1 | 1984 |
| Cadmium | MR | 1 | 1984 |
| Selenium | MR | 1 | 1984 |
| Barium | MR | 1 | 1984 |
| Fluoride | MR | 1 | 1984 |
| Chromium | MR | 1 | 1984 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.