UNION GAP WATER

Union Gap, WA · ~6,433 people served

Check your exact address → Union Gap overview

100

Excellent

PurityRadar safety score

PWSID

WA5390250

State

Washington

City

Union Gap

Population served

6,433

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 Sep 2024). Levels in parts per trillion (ppt).

Lithium

9,780 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2018. Official EPA record →

Monitoring · Lead & Copper Rule began Dec 2017 Resolved

Monitoring & reporting · EPA contaminant 2036 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2043 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2044 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2046 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2047 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2032 began Oct 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1999 Resolved

Recent enforcement actions

State action · SOX Jan 2018
State action · SOX Jan 2011
State action · SOX Jan 2008
State action · SOX Jan 2000
State action · SFK Jan 1995

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Atrazine

1 station · latest Sep 2023

0.00505 · max 0.0051 ug/L · 19

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system WA5390250 — 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.