POTHOLES STATE PARK
PWS ID: WA53SP690 · Coulee City, Washington 99115
Population Served
1,456
Total Violations
13
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 81
- County
- Grant
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 3
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 8 | 2003 |
| Nitrate | MR | 2 | 2021 |
| Nitrate | MCL | 1 | 2020 |
| Coliform (TCR) | MR | 1 | 1991 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.