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Water system · PWSID WA5352000

Mattawa City of

Mattawa, WA · ~5,370 people served

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

PWSID

WA5352000

State

Washington

City

Mattawa

Population served

5,370

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

Lithium

14,000 ppt

limit —

No federal limit

Violations & enforcement

135

Violations on record

0

Unaddressed

1

Health-based

32

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2024. Official EPA record →

Max contaminant level (MCL) · Lead & Copper Rule health-based began Jun 2024 Resolved
Other · EPA contaminant 7000 began Jul 2023 Resolved
Other · EPA contaminant 7000 began Jul 2016 Resolved
Monitoring & reporting · Cyanide began Jan 2014 Resolved
Monitoring & reporting · Cadmium began Jan 2014 Resolved
Monitoring & reporting · Chromium (total) began Jan 2014 Resolved
Monitoring & reporting · Selenium began Jan 2014 Resolved
Monitoring & reporting · Arsenic began Jan 2014 Resolved
Monitoring & reporting · Fluoride began Jan 2014 Resolved
Monitoring & reporting · Nitrate began Jan 2014 Resolved
Monitoring & reporting · Barium began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 1036 began Jan 2014 Resolved

Recent enforcement actions

  • State action · SOX Jul 2024
  • State action · SOX Sep 2023
  • State action · SOX Oct 2017
  • State action · SOX Dec 2016
  • State action · SOX Apr 2015
  • State action · SOX Sep 2014
  • State action · SOX Aug 2013
  • State action · SOX Dec 2012

This profile is built from EPA public records for system WA5352000 — 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.