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Water system · PWSID MO4010490

MALDEN PWS

MALDEN, MO · ~3,706 people served

Check your exact address → MALDEN overview
100
Excellent
PurityRadar safety score

PWSID

MO4010490

State

Missouri

City

MALDEN

Population served

3,706

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

Latest detections from EPA’s UCMR5 monitoring (through Feb 2024). Levels in parts per trillion (ppt).

Lithium

62,800 ppt

limit —

No federal limit

Violations & enforcement

14

Violations on record

1

Unaddressed

9

Health-based

56

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Unaddressed
Max contaminant level (MCL) · Lead & Copper Rule health-based began Sep 2025 Resolved
Other · EPA contaminant 7000 began Jul 2020 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved
Monitoring & reporting · EPA contaminant 0600 began Apr 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1994 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 1994 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 1993 Resolved

Recent enforcement actions

  • State action · SIF Sep 2025
  • State action · SOX Sep 2025
  • State action · SFH Sep 2025
  • State action · SIE Sep 2025
  • State action · SFJ Sep 2025
  • State action · SOX Nov 2020
  • State action · SOX Nov 2019
  • State action · SOX Jan 2014

This profile is built from EPA public records for system MO4010490 — 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.