MARSHLAND WATER ASSOCIATION
PWS ID: OR4101449 · CLATSKANIE, Oregon 97016
Population Served
70
Total Violations
829
Health-Based Violations
51
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 29
- County
- Columbia
- School/Daycare
- No
- MCL Violations
- 44
- Monitoring Violations
- 732
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 182 | 2010 |
| Surface Water Treatment Rule | MR | 87 | 2025 |
| Arsenic | MCL | 18 | 2010 |
| Nitrate | MR | 15 | 2008 |
| Total Haloacetic Acids (HAA5) | MCL | 15 | 2024 |
| Coliform (TCR) | MCL | 11 | 2009 |
| Lead and Copper Rule | MR | 11 | 2023 |
| Arsenic | MR | 10 | 2010 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 9 | 2011 |
| Endrin | MR | 9 | 2011 |
| Glyphosate | MR | 9 | 2011 |
| Heptachlor epoxide | MR | 9 | 2011 |
| Hexachlorocyclopentadiene | MR | 9 | 2011 |
| Methoxychlor | MR | 9 | 2011 |
| Simazine | MR | 9 | 2011 |
| OXAMYL | MR | 9 | 2011 |
| Toxaphene | MR | 9 | 2011 |
| Diquat | MR | 9 | 2011 |
| Di(2-ethylhexyl) adipate | MR | 9 | 2011 |
| Atrazine | MR | 9 | 2011 |
| LASSO | MR | 9 | 2011 |
| HEXACHLOROBENZENE | MR | 9 | 2011 |
| Benzo(a)pyrene | MR | 9 | 2011 |
| Total Polychlorinated Biphenyls (PCB) | MR | 9 | 2011 |
| ETHYLENE DIBROMIDE | MR | 9 | 2011 |
| Chlordane | MR | 9 | 2011 |
| BHC-GAMMA | MR | 9 | 2011 |
| Di(2-ethylhexyl) phthalate | MR | 9 | 2011 |
| Carbofuran | MR | 9 | 2011 |
| Heptachlor | MR | 9 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.