OASIS WATER CORPORATION
PWS ID: WA5319069 · Pasco, Washington 99302
Population Served
556
Total Violations
60
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 210
- County
- Benton
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 37
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 17 | 1995 |
| Lead and Copper Rule | MR | 11 | 2007 |
| Coliform (TCR) | MR | 10 | 2005 |
| Nitrate | MR | 9 | 2006 |
| Barium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Consumer Confidence Rule | Other | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.