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Water system · PWSID WA5353400

MEDICAL LAKE CITY OF

Medical Lake, WA · ~4,982 people served

Check your exact address → Medical Lake overview
90
Excellent
PurityRadar safety score

PWSID

WA5353400

State

Washington

City

Medical Lake

Population served

4,982

Primary source

Groundwater

Score history

▼ 10 points — the score moved from 100 to 90 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 90

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

PFOS

Perfluorooctanesulfonic acid

4.4 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

4.1 ppt

limit 10 ppt

Below EPA limit

Lithium

9,050 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

0

Health-based

5

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2022. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2021 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2021 Resolved
Other · EPA contaminant 7000 began Jul 2016 Resolved
Other · EPA contaminant 7000 began Jul 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2000 Resolved

Recent enforcement actions

  • State action · SOX Oct 2022
  • State action · SOX Oct 2022
  • State action · SOX Oct 2016
  • State action · SOX Sep 2015
  • EPA/federal action · EOX Sep 2004

This profile is built from EPA public records for system WA5353400 — 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.