PUD #1 OF ASOTIN COUNTY
PWS ID: WA5393343 · Clarkston, Washington 99403
PFAS Detected
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
21,930
Total Violations
133
Health-Based Violations
46
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 9,150
- County
- Asotin
- School/Daycare
- No
- MCL Violations
- 46
- Monitoring Violations
- 86
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 46 | 2000 |
| Cadmium | MR | 7 | 2008 |
| Mercury | MR | 7 | 2008 |
| Selenium | MR | 7 | 2008 |
| Arsenic | MR | 7 | 2008 |
| Barium | MR | 7 | 2008 |
| Chromium | MR | 7 | 2008 |
| Fluoride | MR | 7 | 2008 |
| CYANIDE | MR | 6 | 2008 |
| Nickel | MR | 6 | 2008 |
| Beryllium, Total | MR | 6 | 2008 |
| Thallium, Total | MR | 6 | 2008 |
| Antimony, Total | MR | 6 | 2008 |
| Lead and Copper Rule | MR | 3 | 2000 |
| Coliform (TCR) | MR | 2 | 1992 |
| Consumer Confidence Rule | Other | 1 | 2015 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Nitrate | MR | 1 | 1979 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 180 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| HFPO-DA | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 4/7/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/7/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 4/7/2025 | 31.4000 µg/L | 9 µg/L | Detected |
| PFMPA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 4/7/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 4/28/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 4/28/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTA | 4/28/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| NMeFOSAA | 4/28/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFEESA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 12/12/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 12/12/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 12/12/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 12/12/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 12/12/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeS | 12/12/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFMBA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 12/12/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| ADONA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 12/12/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 12/12/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 12/12/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 12/12/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 12/12/2024 | <0.004 µg/L | 0.004 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.