MacKaye Harbor Water District
PWS ID: WA5312911 · Lopez Island, Washington 98261
Population Served
133
Total Violations
11
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 53
- County
- San Juan
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 3
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 6 | 1992 |
| Consumer Confidence Rule | Other | 2 | 2021 |
| Coliform (TCR) | MR | 2 | 2000 |
| Nitrate | MR | 1 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.