CS Q MOUNTAIN WATER COMPANY

DES PERES, MO · ~1,224 people served

Check your exact address → DES PERES overview

100

Excellent

PurityRadar safety score

PWSID

AZ0415096

State

Missouri

City

DES PERES

Population served

1,224

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

110

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jan 2025 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved

Reporting · Lead & Copper Rule began Mar 2022 Resolved

Reporting · Lead & Copper Rule began Dec 2021 Resolved

Reporting · Lead & Copper Rule began Jul 2021 Resolved

Reporting · Lead & Copper Rule began Feb 2021 Resolved

Other · EPA contaminant 7000 began Oct 2020 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jul 2020 Resolved

Reporting · Lead & Copper Rule began Mar 2020 Resolved

Reporting · Lead & Copper Rule began Jun 2019 Resolved

Reporting · Lead & Copper Rule began Feb 2019 Resolved

Reporting · Lead & Copper Rule began Oct 2018 Resolved

Recent enforcement actions

State action · SIA Mar 2025
State action · SOX Mar 2025
State action · SOX Oct 2024
State action · SIF Jul 2024
State action · SIA Nov 2023
State action · SIE Nov 2023
State action · SIA Apr 2022
State action · SOX Apr 2022

This profile is built from EPA public records for system AZ0415096 — 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.