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Water system · PWSID MO3031338

JOHNSON BAY SUBDIVISION

DES PERES, MO · ~126 people served

Check your exact address → DES PERES overview
100
Excellent
PurityRadar safety score

PWSID

MO3031338

State

Missouri

City

DES PERES

Population served

126

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

8

Violations on record

0

Unaddressed

3

Health-based

24

Enforcement actions

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

Reporting · EPA contaminant 5200 began Oct 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2014 Resolved
Monitoring & reporting · EPA contaminant 3014 began Oct 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2005 Resolved
Monitoring & reporting · Total coliform began Jun 2004 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2003 Resolved

Recent enforcement actions

  • State action · SIA Oct 2025
  • State action · SIE Oct 2025
  • State action · SOX Mar 2025
  • State action · SOX Jan 2025
  • State action · SOX Jul 2018
  • State action · SOX Oct 2017
  • State action · SIA May 2015
  • State action · SOX Feb 2015

This profile is built from EPA public records for system MO3031338 — 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.