Community Water System · PWS WA5393343
PUD #1 of Asotin County
Operator location Clarkston, Washington - 35% of 133 violations are health-based (upper-third health share (> 23%)); groundwater source; 21,930 served per SDWIS.
- 21,930
- People served (this PWS)
- 133
- EPA violations (this PWS)
- 46
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
PUD #1 of Asotin County standing, high SDWIS violation third
35% of 133 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 35% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #2,520 of 29,740 among systems serving 500+.
The verdict
PUD #1 of Asotin County sits in the upper third of the sitemap cohort by violation count (133), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (21,930; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 35% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #2,520 of 29,740
- Population · /systems
- #77 of 766
- Population · WA
- 133
- Total EPA violations on record
- 35%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
PUD #1 of Asotin County has 133 recorded EPA violations, 79% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 21% carry more. 35% of this system's own violations are health-based (46 of 133), and it ranks #2,520 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
133 Higher than most more violations than 79% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| HFPO-DA | 4/7/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDoA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 4/7/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/7/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/7/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 4/7/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 4/7/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 4/7/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 4/7/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 4/7/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 4/7/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 4/7/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/7/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 4/7/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 4/7/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 4/28/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 4/28/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 4/28/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 4/28/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFEESA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 12/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 12/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 12/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 12/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 12/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeS | 12/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 12/12/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| ADONA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 12/12/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 12/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 12/12/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 12/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 12/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 12/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
Health-based violations on PUD #1 of Asotin County
46 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WA5393343.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
133 violations · 21,930 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with PUD #1 of Asotin County
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Washington compares on the same EPA violation measures. Washington systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.