SEVEN BAYS ESTATES UNLIMITED
PWS ID: WA5377651 · Marshall, Washington 99020
Population Served
431
Total Violations
31
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 365
- County
- Lincoln
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 21
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 7 | 2015 |
| Coliform (TCR) | MCL | 5 | 1993 |
| Nitrate | MR | 4 | 2022 |
| Consumer Confidence Rule | Other | 3 | 2024 |
| Revised Total Coliform Rule | MON | 1 | 2022 |
| Arsenic | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Lead and Copper Rule | MR | 1 | 1997 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.