SEBASTIAN LAKE UTILITY OPERATING COMPANY

DES PERES, MO · ~298 people served

Check your exact address → DES PERES overview

100

Excellent

PurityRadar safety score

PWSID

AR0000511

State

Missouri

City

DES PERES

Population served

298

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

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 Jul 2024. Official EPA record →

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2023 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2022 Resolved

Monitoring & reporting · Total coliform began Jun 2015 Resolved

Other · EPA contaminant 7000 began Jul 2007 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2006 Resolved

Monitoring & reporting · Total coliform began Sep 2002 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jun 2001 Resolved

Monitoring & reporting · Total coliform began Jun 2001 Resolved

Monitoring & reporting · Total coliform began Mar 2001 Resolved

Monitoring & reporting · Total coliform began Apr 2000 Resolved

Monitoring & reporting · EPA contaminant 0200 began Apr 2000 Resolved

Recent enforcement actions

State action · SOX Jul 2024
State action · SIF Jul 2023
State action · SFL May 2023
State action · SIF Apr 2023
State action · SFJ Mar 2023
State action · SOX Sep 2016
State action · SIF Dec 2015
State action · SOX Sep 2015

This profile is built from EPA public records for system AR0000511 — 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.