SIERRA COUNTRY CLUB
PWS ID: WA5378975 · Coupeville, Washington 98239
Population Served
400
Total Violations
15
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 234
- County
- Island
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 5
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 5 | 2024 |
| TTHM | MCL | 4 | 2024 |
| TTHM | MR | 1 | 2023 |
| Nitrate | MR | 1 | 2003 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Coliform (TCR) | MR | 1 | 1993 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.