CAPE SAN JUAN WATER DISTRICT
PWS ID: WA5311065 · Friday Harbor, Washington 98250
Population Served
158
Total Violations
59
Health-Based Violations
35
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 145
- County
- San Juan
- School/Daycare
- No
- MCL Violations
- 35
- Monitoring Violations
- 19
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 22 | 2000 |
| TTHM | MCL | 13 | 2024 |
| Coliform (TCR) | MR | 7 | 1994 |
| Consumer Confidence Rule | Other | 4 | 2024 |
| TTHM | MR | 1 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2022 |
| Lead and Copper Rule | MR | 1 | 1997 |
| Fluoride | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.