JBLM Lewis

Joint Base Lewis-McChord, WA · ~62,197 people served

Check your exact address → Joint Base Lewis-McChord overview

Action needed

PurityRadar safety score

PWSID

WA5326050

State

Washington

City

Joint Base Lewis-McChord

Population served

62,197

Primary source

Groundwater

Score history

▼ 64 points — the score moved from 100 to 36 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 36

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 Oct 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

11 ppt

limit 4 ppt

Above EPA limit · 2.7×

PFOA

Perfluorooctanoic acid

6.8 ppt

limit 4 ppt

Above EPA limit · 1.7×

PFHxS

Perfluorohexanesulfonic acid

8.4 ppt

limit 10 ppt

Near EPA limit

PFBS

3.8 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2013. Official EPA record →

Monitoring & reporting · Total coliform began Oct 2010 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2010 Resolved

Recent enforcement actions

State action · SOX Jul 2013
State action · SOX Nov 2010
State action · SID Apr 1991

This profile is built from EPA public records for system WA5326050 — 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.