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Water system · PWSID LA1055101

MAGNOLIA-JACKSON SQUARE

DES PERES, MO · ~825 people served

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

PWSID

LA1055101

State

Missouri

City

DES PERES

Population served

825

Primary source

GWP

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

15

Violations on record

1

Unaddressed

8

Health-based

56

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2023. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began May 2023 Unaddressed
Max residual disinfectant · EPA contaminant 0999 health-based began Jan 2022 Resolved
Max residual disinfectant · EPA contaminant 0999 health-based began Oct 2021 Resolved
Max residual disinfectant · EPA contaminant 0999 health-based began Jul 2021 Resolved
Treatment technique · EPA contaminant 0700 health-based began Nov 2019 Resolved
Monitoring & reporting · Total coliform began May 2014 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2014 Resolved
Treatment technique · EPA contaminant 0700 health-based began Jun 2013 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2013 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2013 Resolved
Monitoring & reporting · Total coliform began Feb 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2010 Resolved

Recent enforcement actions

  • State action · SIF Jun 2023
  • State action · SIA May 2023
  • State action · SIE May 2023
  • State action · SOX Jul 2022
  • State action · SIF Feb 2022
  • State action · SIF Feb 2022
  • State action · SIA Feb 2022
  • State action · SIE Feb 2022

This profile is built from EPA public records for system LA1055101 — 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.