KEESLER AIR FORCE BASE

BILOXI, MS · ~8,006 people served

Check your exact address → BILOXI overview

Fair

PurityRadar safety score

PWSID

MS0240049

State

Mississippi

City

BILOXI

Population served

8,006

Primary source

Groundwater

Score history

▼ 31 points — the score moved from 100 to 69 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 69

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 2025). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

7.7 ppt

limit 4 ppt

Above EPA limit · 1.9×

Lithium

11,700 ppt

limit —

No federal limit

Violations & enforcement

610

Violations on record

Unaddressed

Health-based

353

Enforcement actions

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

Other · EPA contaminant 7500 began Oct 2008 Unaddressed

Monitoring & reporting · Total coliform began Apr 2013 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2013 Resolved

Monitoring & reporting · EPA contaminant 4020 began Oct 2012 Resolved

Monitoring & reporting · Combined radium-226/228 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 4020 began Oct 2012 Resolved

Monitoring & reporting · Combined radium-226/228 began Oct 2012 Resolved

Recent enforcement actions

State action · SOX Sep 2013
State action · SOX Jun 2013
State action · SIF May 2013
State action · SIF May 2013
State action · SOX May 2013
State action · SIE May 2013
State action · SFJ May 2013
State action · SOX Mar 2013

This profile is built from EPA public records for system MS0240049 — 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.