Maxwelton Water System
PWS ID: WA5310811 · Coupeville, Washington 98239
Population Served
1,700
Total Violations
38
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 5
- County
- Island
- School/Daycare
- Yes
- MCL Violations
- 11
- Monitoring Violations
- 26
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 15 | 2011 |
| Coliform (TCR) | MCL | 11 | 2004 |
| TTHM | MR | 4 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2024 |
| Coliform (TCR) | MR | 2 | 1994 |
| Nitrate | MR | 1 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.