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Water system · PWSID IA1750048

MASON CITY WATER DEPARTMENT

MASON CITY, IA · ~27,338 people served

Check your exact address → MASON CITY overview
100
Excellent
PurityRadar safety score

PWSID

IA1750048

State

Iowa

City

MASON CITY

Population served

27,338

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 Jul 2024). Levels in parts per trillion (ppt).

Lithium

92,000 ppt

limit —

No federal limit

Violations & enforcement

137

Violations on record

0

Unaddressed

13

Health-based

639

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2024. Official EPA record →

Monitoring · Lead & Copper Rule began Jun 2024 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2012 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2008 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2004 Resolved
Monitoring & reporting · Gross alpha began Oct 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2004 Resolved
Other · EPA contaminant 7000 began Jul 2004 Resolved
Monitoring & reporting · Gross alpha began Jul 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2004 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2004 Resolved

Recent enforcement actions

  • State action · SOX Oct 2024
  • State action · SIE Jul 2024
  • State action · SFJ Jul 2024
  • State action · SOX Jul 2024
  • State action · SOX Sep 2012
  • State action · SIF Sep 2012
  • State action · SIE Aug 2012
  • State action · SFJ Aug 2012

This profile is built from EPA public records for system IA1750048 — 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.