HOLMES HARBOR WATER CO
PWS ID: WA5333870 · Coupeville, Washington 98239
Population Served
110
Total Violations
58
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 81
- County
- Island
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 46
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 24 | 2005 |
| Coliform (TCR) | MCL | 10 | 2000 |
| Coliform (TCR) | MR | 7 | 2000 |
| Arsenic | MR | 1 | 2008 |
| Chromium | MR | 1 | 2008 |
| Mercury | MR | 1 | 2008 |
| Nickel | MR | 1 | 2008 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2021 |
| TTHM | MR | 1 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Selenium | MR | 1 | 2008 |
| CYANIDE | MR | 1 | 2008 |
| Beryllium, Total | MR | 1 | 2008 |
| Antimony, Total | MR | 1 | 2008 |
| Barium | MR | 1 | 2008 |
| Fluoride | MR | 1 | 2008 |
| Thallium, Total | MR | 1 | 2008 |
| Cadmium | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.