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Water system · PWSID WA5360190

TWANOH TERRACE WATER CO

UNION, WA · ~75 people served

Check your exact address → UNION overview
100
Excellent
PurityRadar safety score

PWSID

WA5360190

State

Washington

City

UNION

Population served

75

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

41

Violations on record

0

Unaddressed

0

Health-based

27

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2010. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2032 began Jul 2007 Resolved
Monitoring & reporting · Nitrate began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2931 began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2032 began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2946 began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2032 began Oct 2006 Resolved
Monitoring & reporting · EPA contaminant 2946 began Oct 2006 Resolved
Monitoring & reporting · EPA contaminant 2931 began Oct 2006 Resolved
Monitoring & reporting · Cyanide began Jan 2005 Resolved
Monitoring & reporting · Chromium (total) began Jan 2005 Resolved
Monitoring & reporting · Cadmium began Jan 2005 Resolved

Recent enforcement actions

  • State action · SOX May 2010
  • State action · SOX Aug 2009
  • State action · SOX Aug 2009
  • State action · SOX Aug 2009
  • State action · SOX Dec 2008
  • State action · SOX Dec 2008
  • State action · SOX Dec 2008
  • State action · SOX Dec 2008

This profile is built from EPA public records for system WA5360190 — 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.