ECM WATER & SEWER AUTHORITY - FLINT HILL

O'FALLON, MO · ~469 people served

Check your exact address → O'FALLON overview

100

Excellent

PurityRadar safety score

PWSID

MO6011147

State

Missouri

City

O'FALLON

Population served

469

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2016. Official EPA record →

Monitoring & reporting · Total coliform began Dec 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2004 Resolved

Other · EPA contaminant 7000 began Jul 2001 Resolved

Monitoring & reporting · Gross alpha began Apr 1993 Resolved

Recent enforcement actions

State action · SIA Jan 2016
State action · SOX Jan 2014
State action · SIF Jul 2012
State action · SIE Jan 2012
State action · SIA Jan 2012
State action · SIE Aug 2004
State action · SFJ Aug 2004
State action · SIF Jul 2004

This profile is built from EPA public records for system MO6011147 — 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.