ROCHE HARBOR WATER SYSTEM INC
PWS ID: WA5373230 · Friday Harbor, Washington 98250
Population Served
1,985
Total Violations
1,788
Health-Based Violations
21
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 626
- County
- San Juan
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 1,760
- Treatment Tech Violations
- 21
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| 1,2,4-Trichlorobenzene | MR | 87 | 2007 |
| DICHLOROMETHANE | MR | 87 | 2007 |
| o-Dichlorobenzene | MR | 87 | 2007 |
| p-Dichlorobenzene | MR | 87 | 2007 |
| 1,1-Dichloroethylene | MR | 87 | 2007 |
| 1,2-Dichloroethane | MR | 87 | 2007 |
| 1,1,1-Trichloroethane | MR | 87 | 2007 |
| 1,1,2-Trichloroethane | MR | 87 | 2007 |
| Tetrachloroethylene | MR | 87 | 2007 |
| CHLOROBENZENE | MR | 87 | 2007 |
| Benzene | MR | 87 | 2007 |
| Ethylbenzene | MR | 87 | 2007 |
| Styrene | MR | 87 | 2007 |
| Vinyl chloride | MR | 87 | 2007 |
| Carbon tetrachloride | MR | 87 | 2007 |
| 1,2-Dichloropropane | MR | 87 | 2007 |
| Toluene | MR | 87 | 2007 |
| cis-1,2-Dichloroethylene | MR | 87 | 2007 |
| trans-1,2-Dichloroethylene | MR | 87 | 2007 |
| Trichloroethylene | MR | 87 | 2007 |
| Surface Water Treatment Rule | TT | 21 | 2010 |
| Surface Water Treatment Rule | MR | 7 | 2019 |
| Consumer Confidence Rule | Other | 3 | 2013 |
| Nitrate | MR | 3 | 2012 |
| Coliform (TCR) | MR | 2 | 1997 |
| Arsenic | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.