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Water system · PWSID MS0240027

KNOLLWOOD

DES PERES, MO · ~87 people served

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

PWSID

MS0240027

State

Missouri

City

DES PERES

Population served

87

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

66

Violations on record

0

Unaddressed

0

Health-based

55

Enforcement actions

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

Monitoring · Lead & Copper Rule began Jan 2025 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2025 Resolved
Monitoring · Lead & Copper Rule began Sep 2024 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2024 Resolved
Monitoring & reporting · EPA contaminant 4020 began Apr 2011 Resolved
Monitoring & reporting · Combined radium-226/228 began Apr 2011 Resolved
Monitoring & reporting · EPA contaminant 4030 began Apr 2011 Resolved
Monitoring & reporting · EPA contaminant 4020 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 4030 began Jan 2011 Resolved
Monitoring & reporting · Combined radium-226/228 began Jan 2011 Resolved
Monitoring & reporting · Combined radium-226/228 began Oct 2010 Resolved
Monitoring & reporting · EPA contaminant 4020 began Oct 2010 Resolved

Recent enforcement actions

  • State action · SOX Jul 2025
  • State action · SIF Jun 2025
  • State action · SIE Apr 2025
  • State action · SFJ Apr 2025
  • State action · SFJ Feb 2025
  • State action · SIE Feb 2025
  • State action · SOX Feb 2025
  • State action · SO+ Jan 2025

This profile is built from EPA public records for system MS0240027 — 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.