OROVILLE CITY OF
PWS ID: WA5364400 · Oroville, Washington 98844-2200
Population Served
3,256
Total Violations
92
Health-Based Violations
19
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,732
- County
- Okanogan
- School/Daycare
- No
- MCL Violations
- 19
- Monitoring Violations
- 72
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 19 | 2004 |
| Endrin | MR | 2 | 2014 |
| Toxaphene | MR | 2 | 2014 |
| Simazine | MR | 2 | 2014 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2014 |
| Atrazine | MR | 2 | 2014 |
| Heptachlor epoxide | MR | 2 | 2014 |
| HEXACHLOROBENZENE | MR | 2 | 2014 |
| Benzo(a)pyrene | MR | 2 | 2014 |
| Methoxychlor | MR | 2 | 2014 |
| Hexachlorocyclopentadiene | MR | 2 | 2014 |
| Chlordane | MR | 2 | 2014 |
| Coliform (TCR) | MR | 2 | 1992 |
| LASSO | MR | 2 | 2014 |
| Heptachlor | MR | 2 | 2014 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2014 |
| BHC-GAMMA | MR | 2 | 2014 |
| Nitrate | MR | 1 | 2003 |
| Arsenic | MR | 1 | 2008 |
| Barium | MR | 1 | 2008 |
| Cadmium | MR | 1 | 2008 |
| Fluoride | MR | 1 | 2008 |
| Mercury | MR | 1 | 2008 |
| Beryllium, Total | MR | 1 | 2008 |
| Thallium, Total | MR | 1 | 2008 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2008 |
| p-Dichlorobenzene | MR | 1 | 2008 |
| Vinyl chloride | MR | 1 | 2008 |
| 1,1-Dichloroethylene | MR | 1 | 2008 |
| 1,2-Dichloroethane | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.