LEWIS CO WATER DIST #2
PWS ID: WA5347001 · Onalaska, Washington 98570
Population Served
1,983
Total Violations
2,344
Health-Based Violations
2
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 246
- County
- Lewis
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 2,335
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Endrin | MR | 126 | 2008 |
| BHC-GAMMA | MR | 126 | 2008 |
| Methoxychlor | MR | 126 | 2008 |
| Toxaphene | MR | 126 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 126 | 2008 |
| Simazine | MR | 126 | 2008 |
| Atrazine | MR | 126 | 2008 |
| Heptachlor | MR | 126 | 2008 |
| Heptachlor epoxide | MR | 126 | 2008 |
| HEXACHLOROBENZENE | MR | 126 | 2008 |
| Chlordane | MR | 126 | 2008 |
| Hexachlorocyclopentadiene | MR | 126 | 2008 |
| LASSO | MR | 126 | 2008 |
| Benzo(a)pyrene | MR | 126 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 94 | 2008 |
| Pentachlorophenol | MR | 35 | 2008 |
| Nitrate | MR | 28 | 2015 |
| Lead and Copper Rule | MR | 21 | 2008 |
| Coliform (TCR) | MR | 12 | 2010 |
| Picloram | MR | 11 | 2005 |
| Dinoseb | MR | 11 | 2005 |
| 2,4,5-TP | MR | 11 | 2005 |
| Dalapon | MR | 11 | 2005 |
| cis-1,2-Dichloroethylene | MR | 10 | 2005 |
| DICHLOROMETHANE | MR | 10 | 2005 |
| p-Dichlorobenzene | MR | 10 | 2005 |
| Vinyl chloride | MR | 10 | 2005 |
| 1,2-Dichloroethane | MR | 10 | 2005 |
| 1,1,1-Trichloroethane | MR | 10 | 2005 |
| Carbon tetrachloride | MR | 10 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.