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Water system · PWSID WI4200469

FOND DU LAC WATERWORKS

FOND DU LAC, WI · ~44,303 people served

Check your exact address → FOND DU LAC overview
100
Excellent
PurityRadar safety score

PWSID

WI4200469

State

Wisconsin

City

FOND DU LAC

Population served

44,303

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

12,000 ppt

limit —

No federal limit

Violations & enforcement

110

Violations on record

0

Unaddressed

21

Health-based

166

Enforcement actions

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

Other · EPA contaminant 7500 began Oct 2024 Resolved
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2016 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2016 Resolved
Monitoring & reporting · Total coliform began Jun 2015 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2015 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2014 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2014 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2013 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2013 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SIF Jun 2025
  • State action · SOX Mar 2025
  • State action · SIA Aug 2019
  • State action · SIA Aug 2019
  • State action · SOX Jul 2019
  • State action · SOX Jul 2019
  • State action · SOX May 2017

This profile is built from EPA public records for system WI4200469 — 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.