ST CHARLES CO PWSD 2 - SUMAC RIDGE

O'FALLON, MO · ~103 people served

Check your exact address → O'FALLON overview

100

Excellent

PurityRadar safety score

PWSID

MO6031209

State

Missouri

City

O'FALLON

Population served

103

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 Apr 2025. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved

Monitoring & reporting · EPA contaminant 3014 began Sep 2015 Resolved

Other · EPA contaminant 7000 began Jul 2001 Resolved

Recent enforcement actions

State action · SOX Apr 2025
State action · SOX Apr 2021
State action · SIF Oct 2015
State action · SIE Oct 2015
State action · SIA Oct 2015
State action · SOX Jul 2002

This profile is built from EPA public records for system MO6031209 — 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.