DAYTON, CITY OF
PWS ID: OR4100252 · DAYTON, Oregon 97114
Population Served
2,535
Total Violations
103
Health-Based Violations
7
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 904
- County
- Yamhill
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 92
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 10 | 2010 |
| Nitrate | MR | 9 | 2009 |
| Coliform (TCR) | MCL | 4 | 2007 |
| Lead and Copper Rule | MR | 3 | 2005 |
| Groundwater Rule | TT | 3 | 2018 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1996 |
| E. COLI | MR | 2 | 2010 |
| Groundwater Rule | MR | 2 | 2020 |
| Arsenic | MR | 1 | 2002 |
| Cadmium | MR | 1 | 2002 |
| Chromium | MR | 1 | 2002 |
| CYANIDE | MR | 1 | 2002 |
| Beryllium, Total | MR | 1 | 2002 |
| Selenium | MR | 1 | 2002 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2002 |
| Xylenes, Total | MR | 1 | 2002 |
| DICHLOROMETHANE | MR | 1 | 2002 |
| Vinyl chloride | MR | 1 | 2002 |
| trans-1,2-Dichloroethylene | MR | 1 | 2002 |
| 1,2-Dichloroethane | MR | 1 | 2002 |
| 1,2-Dichloropropane | MR | 1 | 2002 |
| Benzene | MR | 1 | 2002 |
| Toluene | MR | 1 | 2002 |
| Ethylbenzene | MR | 1 | 2002 |
| Styrene | MR | 1 | 2002 |
| Endrin | MR | 1 | 2002 |
| Methoxychlor | MR | 1 | 2002 |
| Toxaphene | MR | 1 | 2002 |
| Dalapon | MR | 1 | 2002 |
| Diquat | MR | 1 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.