ILLAHEE OYEHUT
PWS ID: WA5335450 · MONTESANO, Washington 98563
Population Served
971
Total Violations
26
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 129
- County
- Grays Harbor
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 13
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 9 | 2000 |
| Coliform (TCR) | MR | 4 | 1995 |
| Mercury | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| Lead and Copper Rule | MR | 1 | 1999 |
| Nitrate | 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.