CTUIR PWD MISSION
PWS ID: 104111101 · PENDLETON, 10 97801
Population Served
1,310
Total Violations
644
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 355
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 637
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Gross Alpha, Excl. Radon and U | MR | 86 | 2022 |
| Combined Uranium | MR | 85 | 2022 |
| Combined Radium (-226 and -228) | MR | 85 | 2022 |
| Coliform (TCR) | MR | 33 | 2011 |
| Chlorine | MR | 14 | 2025 |
| Nitrate | MR | 13 | 2014 |
| 2,3,7,8-TCDD | MR | 13 | 2023 |
| Atrazine | MR | 5 | 2023 |
| BHC-GAMMA | MR | 5 | 2023 |
| Chlordane | MR | 5 | 2023 |
| Dalapon | MR | 5 | 2023 |
| Di(2-ethylhexyl) adipate | MR | 5 | 2023 |
| Di(2-ethylhexyl) phthalate | MR | 5 | 2023 |
| Dinoseb | MR | 5 | 2023 |
| Endothall | MR | 5 | 2023 |
| Glyphosate | MR | 5 | 2023 |
| Heptachlor | MR | 5 | 2023 |
| Heptachlor epoxide | MR | 5 | 2023 |
| Methoxychlor | MR | 5 | 2023 |
| OXAMYL | MR | 5 | 2023 |
| Picloram | MR | 5 | 2023 |
| 2,4-D | MR | 5 | 2023 |
| trans-1,2-Dichloroethylene | MR | 5 | 2023 |
| Benzene | MR | 5 | 2023 |
| Ethylbenzene | MR | 5 | 2023 |
| Tetrachloroethylene | MR | 5 | 2023 |
| Trichloroethylene | MR | 5 | 2023 |
| Xylenes, Total | MR | 5 | 2023 |
| 1,1,2-Trichloroethane | MR | 5 | 2023 |
| 1,2-Dichloroethane | MR | 5 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.