DAYTON WATER DEPARTMENT
PWS ID: WA5318250 · DAYTON, Washington 99328
Population Served
3,283
Total Violations
20
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,483
- County
- Columbia
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 5
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 10 | 1998 |
| Consumer Confidence Rule | Other | 4 | 2018 |
| Coliform (TCR) | MR | 3 | 1994 |
| Lead and Copper Rule | MR | 1 | 2000 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.