DUCK LAKE WATER ASSOCIATION
PWS ID: WA5320200 · Okanogan, Washington 98840-8221
Population Served
635
Total Violations
62
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 190
- County
- Okanogan
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 49
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 11 | 1999 |
| Coliform (TCR) | MR | 9 | 1997 |
| Aldicarb | MR | 2 | 2008 |
| Carbofuran | MR | 2 | 2008 |
| Aldicarb sulfone | MR | 2 | 2008 |
| Aldicarb sulfoxide | MR | 2 | 2008 |
| OXAMYL | MR | 2 | 2008 |
| Consumer Confidence Rule | Other | 1 | 1999 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2011 |
| DICHLOROMETHANE | MR | 1 | 2011 |
| o-Dichlorobenzene | MR | 1 | 2011 |
| p-Dichlorobenzene | MR | 1 | 2011 |
| 1,2-Dichloroethane | MR | 1 | 2011 |
| 1,1,1-Trichloroethane | MR | 1 | 2011 |
| Carbon tetrachloride | MR | 1 | 2011 |
| Tetrachloroethylene | MR | 1 | 2011 |
| CHLOROBENZENE | MR | 1 | 2011 |
| Benzene | MR | 1 | 2011 |
| Toluene | MR | 1 | 2011 |
| Barium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| 1,1-Dichloroethylene | MR | 1 | 2011 |
| Ethylbenzene | MR | 1 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.