PUD #1 OF ASOTIN COUNTY

Clarkston, WA · ~21,930 people served

Check your exact address → Clarkston overview

100

Excellent

PurityRadar safety score

PWSID

WA5393343

State

Washington

City

Clarkston

Population served

21,930

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Apr 2025). Levels in parts per trillion (ppt).

Lithium

31,400 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2015. Official EPA record →

Other · EPA contaminant 7000 began Jul 2015 Resolved

Monitoring & reporting · Barium began Jan 2008 Resolved

Monitoring & reporting · Selenium began Jan 2008 Resolved

Monitoring & reporting · Chromium (total) began Jan 2008 Resolved

Monitoring & reporting · Cyanide began Jan 2008 Resolved

Monitoring & reporting · Fluoride began Jan 2008 Resolved

Monitoring & reporting · Cadmium began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 1036 began Jan 2008 Resolved

Monitoring & reporting · Antimony began Jan 2008 Resolved

Monitoring & reporting · Beryllium began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jan 2008 Resolved

Monitoring & reporting · Arsenic began Jan 2008 Resolved

Recent enforcement actions

State action · SOX Sep 2015
State action · SOX Aug 2011
State action · SOX Aug 2011
State action · SOX Aug 2011
State action · SOX Aug 2011
State action · SOX Aug 2011
State action · SOX Aug 2011
EPA/federal action · EOX Aug 2008

This profile is built from EPA public records for system WA5393343 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.