ANDESITE RIDGE WATER SYSTEM
PWS ID: MT0004468 · BIG SKY, Montana 59716
Population Served
450
Total Violations
34
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 223
- County
- Madison
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 12
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 14 | 2015 |
| Coliform (TCR) | MR | 10 | 2010 |
| Groundwater Rule | Other | 3 | 2010 |
| Lead and Copper Rule | TT | 3 | 2012 |
| Consumer Confidence Rule | Other | 2 | 2020 |
| Lead and Copper Rule | MR | 2 | 2009 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.