WASHOUGAL CITY OF
PWS ID: WA5393400 · Washougal, Washington 98671
PFAS Detected
3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
21,441
Total Violations
335
Health-Based Violations
2
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 7,120
- County
- Clark
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 330
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Endrin | MR | 21 | 2008 |
| Toxaphene | MR | 21 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 21 | 2008 |
| Simazine | MR | 21 | 2008 |
| Hexachlorocyclopentadiene | MR | 21 | 2008 |
| Heptachlor | MR | 21 | 2008 |
| HEXACHLOROBENZENE | MR | 21 | 2008 |
| Benzo(a)pyrene | MR | 21 | 2008 |
| Chlordane | MR | 21 | 2008 |
| Atrazine | MR | 21 | 2008 |
| Methoxychlor | MR | 21 | 2008 |
| LASSO | MR | 21 | 2008 |
| BHC-GAMMA | MR | 21 | 2008 |
| Heptachlor epoxide | MR | 20 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 14 | 2008 |
| Pentachlorophenol | MR | 11 | 2008 |
| Coliform (TCR) | MR | 3 | 1992 |
| Coliform (TCR) | MCL | 2 | 1993 |
| Barium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Consumer Confidence Rule | Other | 1 | 2015 |
| Cadmium | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 5 of 90 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NEtFOSAA | 9/30/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/30/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 9/30/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 9/30/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/25/2025 | <9 µg/L | 9 µg/L | Not Detected |
| lithium | 9/25/2025 | <9 µg/L | 9 µg/L | Not Detected |
| lithium | 9/25/2025 | <9 µg/L | 9 µg/L | Not Detected |
| HFPO-DA | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/5/2025 | 0.0033 µg/L | 0.003 µg/L | Detected |
| PFHpA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 8/5/2025 | 0.0053 µg/L | 0.004 µg/L | Detected |
| PFOA | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 8/5/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 6:2 FTS | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/5/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFBA | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 8/5/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 8/5/2025 | 0.0031 µg/L | 0.003 µg/L | Detected |
| PFMPA | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 8/5/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFDA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NMeFOSAA | 8/5/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTA | 8/5/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBA | 8/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFEESA | 8/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.