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Water system · PWSID MO6010708

ST CLAIR PWS

ST CLAIR, MO · ~4,700 people served

Check your exact address → ST CLAIR overview
99
Excellent
PurityRadar safety score

PWSID

MO6010708

State

Missouri

City

ST CLAIR

Population served

4,700

Primary source

Groundwater

Score history

▼ 1 point — the score moved from 100 to 99 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 99

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

PFHxS

Perfluorohexanesulfonic acid

5.6 ppt

limit 10 ppt

Near EPA limit

Violations & enforcement

23

Violations on record

0

Unaddressed

11

Health-based

64

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2021. Official EPA record →

Other · EPA contaminant 7000 began Jul 2021 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2011 Resolved
Other · EPA contaminant 7500 began Dec 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2008 Resolved

Recent enforcement actions

  • State action · SOX Dec 2021
  • State action · SOX Feb 2016
  • State action · SIA Jan 2016
  • State action · SIF Dec 2015
  • State action · SIE Nov 2015
  • State action · SFJ Nov 2015
  • State action · SIF Sep 2015
  • State action · SFJ Sep 2015

This profile is built from EPA public records for system MO6010708 — 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.