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Water system · PWSID MO6010801

UNION PWS

UNION, MO · ~12,348 people served

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

PWSID

MO6010801

State

Missouri

City

UNION

Population served

12,348

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

24

Violations on record

0

Unaddressed

19

Health-based

81

Enforcement actions

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

Monitoring · Lead & Copper Rule began Feb 2025 Resolved
Other · EPA contaminant 7000 began Jul 2021 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2009 Resolved

Recent enforcement actions

  • State action · SIF Apr 2025
  • State action · SIA Apr 2025
  • State action · SIE Apr 2025
  • State action · SOX Mar 2025
  • State action · SOX Dec 2021
  • State action · SOX Oct 2015
  • State action · SFK Oct 2015
  • State action · SIF Sep 2015

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Apr 2023

0.23 · max 1.49 mg/l as N · 30

Lead

1 station · latest Oct 2023

0.3 · max 5.4 ug/l · 21

Arsenic

1 station · latest Oct 2023

0.77 · max 0.92 ug/l · 11

Copper

1 station · latest Oct 2023

0.94 · max 3.4 ug/l · 11

Fluoride

1 station · latest Oct 2023

0.07 · max 0.08 mg/l · 11

Manganese

1 station · latest Oct 2023

27.1 · max 38 ug/l · 11

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system MO6010801 — 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.