SHELBY ADDITION WATER DISTRICT
PWS ID: MT0002800 · MISSOULA, Montana 59806
Population Served
145
Total Violations
93
Health-Based Violations
51
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 65
- County
- Missoula
- School/Daycare
- No
- MCL Violations
- 51
- Monitoring Violations
- 37
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 51 | 2014 |
| Coliform (TCR) | MR | 17 | 2001 |
| Nitrate-Nitrite | MR | 6 | 2004 |
| E. COLI | MR | 6 | 2012 |
| Consumer Confidence Rule | Other | 5 | 2018 |
| Fluoride | MR | 1 | 1982 |
| Selenium | MR | 1 | 1982 |
| Arsenic | MR | 1 | 1982 |
| Barium | MR | 1 | 1982 |
| Mercury | MR | 1 | 1982 |
| Cadmium | MR | 1 | 1982 |
| Nitrate | MR | 1 | 1982 |
| Chromium | MR | 1 | 1982 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.