TWANOH STATE PARK
PWS ID: WA53SP940 · Belfair, Washington 98528
Population Served
3,173
Total Violations
32
Health-Based Violations
15
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 49
- County
- Mason
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 15
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 15 | 2006 |
| Nitrate | MR | 7 | 2007 |
| Coliform (TCR) | MR | 7 | 2013 |
| Revised Total Coliform Rule | MON | 1 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.