COE DALLES/JD-THE DALLES DAM
PWS ID: OR4194200 · THE DALLES, Oregon 97058
Population Served
140
Total Violations
219
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Federal
- Connections
- 1
- County
- Wasco
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 208
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 18 | 2013 |
| Nitrate | MR | 13 | 2009 |
| Lead and Copper Rule | MR | 12 | 2010 |
| Coliform (TCR) | MCL | 10 | 2016 |
| 1,2,4-Trichlorobenzene | MR | 3 | 2005 |
| cis-1,2-Dichloroethylene | MR | 3 | 2005 |
| p-Dichlorobenzene | MR | 3 | 2005 |
| Vinyl chloride | MR | 3 | 2005 |
| 1,1-Dichloroethylene | MR | 3 | 2005 |
| 1,2-Dichloroethane | MR | 3 | 2005 |
| 1,1,1-Trichloroethane | MR | 3 | 2005 |
| Carbon tetrachloride | MR | 3 | 2005 |
| 1,2-Dichloropropane | MR | 3 | 2005 |
| Trichloroethylene | MR | 3 | 2005 |
| 1,1,2-Trichloroethane | MR | 3 | 2005 |
| Tetrachloroethylene | MR | 3 | 2005 |
| CHLOROBENZENE | MR | 3 | 2005 |
| Toluene | MR | 3 | 2005 |
| Ethylbenzene | MR | 3 | 2005 |
| Endrin | MR | 3 | 2005 |
| BHC-GAMMA | MR | 3 | 2005 |
| Methoxychlor | MR | 3 | 2005 |
| Toxaphene | MR | 3 | 2005 |
| Dalapon | MR | 3 | 2005 |
| Diquat | MR | 3 | 2005 |
| Glyphosate | MR | 3 | 2005 |
| Simazine | MR | 3 | 2005 |
| Hexachlorocyclopentadiene | MR | 3 | 2005 |
| Carbofuran | MR | 3 | 2005 |
| Atrazine | MR | 3 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.