ST CHARLES PWS

ST CHARLES, MO · ~73,040 people served

Check your exact address → ST CHARLES overview

100

Excellent

PurityRadar safety score

PWSID

MO6010707

State

Missouri

City

ST CHARLES

Population served

73,040

Primary source

SWP

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

Lithium

35,800 ppt

limit —

No federal limit

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

Other · EPA contaminant 7000 began Jul 2012 Resolved

Other · EPA contaminant 7000 began Jul 2006 Resolved

Other · EPA contaminant 7000 began Jul 2003 Resolved

Recent enforcement actions

State action · SOX Apr 2025
State action · SOX May 2014
State action · SOX Sep 2006
State action · SIA Sep 1988
State action · SIE Sep 1988
State action · SIE Sep 1988
State action · SIA Sep 1988
State action · SIA Sep 1987

This profile is built from EPA public records for system MO6010707 — 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.