CS MORMON LAKE WATER COMPANY

DES PERES, MO · ~353 people served

Check your exact address → DES PERES overview

100

Excellent

PurityRadar safety score

PWSID

AZ0403014

State

Missouri

City

DES PERES

Population served

353

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 Sep 2025. Official EPA record →

Other · EPA contaminant 7500 began Jul 2025 Resolved

Monitoring · Lead & Copper Rule began Jun 2024 Resolved

Other · EPA contaminant 7500 began Aug 2022 Resolved

Monitoring · Lead & Copper Rule began Jul 2021 Resolved

Reporting · Lead & Copper Rule began Sep 2018 Resolved

Monitoring · Lead & Copper Rule began Aug 2016 Resolved

Monitoring & reporting · Total coliform began Aug 2013 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2013 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2013 Resolved

Other · EPA contaminant 7000 began Oct 2012 Resolved

Max contaminant level (MCL) · Total coliform health-based began Feb 2012 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2011 Resolved

Recent enforcement actions

State action · SIF Sep 2025
State action · SOX Sep 2025
State action · SIA Sep 2025
State action · SOX Aug 2024
State action · SOX Aug 2024
State action · SIE Jul 2024
State action · SIA Jul 2024
State action · SOX Feb 2024

This profile is built from EPA public records for system AZ0403014 — 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.