Home/ Directory/ MO/ MERCER COUNTY PWSD 1

Water system · PWSID MO2024382

MERCER COUNTY PWSD 1

MERCER, MO · ~3,200 people served

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

PWSID

MO2024382

State

Missouri

City

MERCER

Population served

3,200

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

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

Lithium

9,600 ppt

limit —

No federal limit

PFBA

5.2 ppt

limit —

No federal limit

Violations & enforcement

12

Violations on record

0

Unaddressed

3

Health-based

37

Enforcement actions

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

Other · EPA contaminant 7500 began Mar 2025 Resolved
Other · EPA contaminant 7500 began Mar 2025 Resolved
Monitoring · Lead & Copper Rule began Jun 2024 Resolved
Monitoring · Lead & Copper Rule began Feb 2024 Resolved
Monitoring · Lead & Copper Rule began Jan 2024 Resolved
Monitoring · Lead & Copper Rule began Nov 2023 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2015 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2015 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2015 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2003 Resolved

Recent enforcement actions

  • State action · SIF May 2025
  • State action · SIF May 2025
  • State action · SIF May 2025
  • State action · SOX Mar 2025
  • State action · SOX Mar 2025
  • State action · SIE Jul 2024
  • State action · SIA Jul 2024
  • State action · SOX Jul 2024

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 Aug 2021

0.529 · max 2.4 mg/l as N · 34

Arsenic

2 stations · latest Mar 2024

0.915 · max 2.1 ug/L · 11

Copper

2 stations · latest Jul 2021

1.1 · max 2 ug/l · 9

Manganese

2 stations · latest Jul 2021

106 · max 1,180 ug/l · 9

Lead

1 station · latest Jul 2021

0.33 · max 1.79 ug/l · 6

Fluoride

1 station · latest Jul 2021

0.19 · max 0.2 mg/l · 5

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 MO2024382 — 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.