SHAWNEE MUNICIPAL AUTHORITY

SHAWNEE, OK · ~29,990 people served

Check your exact address → SHAWNEE overview

100

Excellent

PurityRadar safety score

PWSID

OK1020504

State

Oklahoma

City

SHAWNEE

Population served

29,990

Primary source

Surface water

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

PFBA

5.8 ppt

limit —

No federal limit

PFPeA

3.2 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

115

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2025. Official EPA record →

Monitoring & reporting · Bromate began Sep 2024 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jun 2020 Resolved

Treatment technique · EPA contaminant 0300 health-based began Aug 2016 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jul 2015 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jun 2015 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Dec 2008 Resolved

Monitoring & reporting · Bromate began Oct 2008 Resolved

Treatment technique · Bromate health-based began Oct 2008 Resolved

Treatment technique · Bromate health-based began Jul 2008 Resolved

Monitoring & reporting · Bromate began Jul 2008 Resolved

Treatment technique · Bromate health-based began Apr 2008 Resolved

Recent enforcement actions

State action · SIF May 2025
State action · SIA Mar 2025
State action · SIE Mar 2025
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SIE Nov 2024
State action · SIA Nov 2024
State action · SOX Jul 2021

This profile is built from EPA public records for system OK1020504 — 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.