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Water system · PWSID WI1220117

POTOSI WATERWORKS

POTOSI, WI · ~718 people served

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

PWSID

WI1220117

State

Wisconsin

City

POTOSI

Population served

718

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

34

Violations on record

0

Unaddressed

3

Health-based

38

Enforcement actions

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

Treatment technique · EPA contaminant 0400 health-based began Mar 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2024 Resolved
Treatment technique · EPA contaminant 0400 health-based began May 2018 Resolved
Monitoring · Lead & Copper Rule began Mar 2018 Resolved
Monitoring & reporting · Gross alpha began Jan 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2015 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2013 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2012 Resolved
Monitoring & reporting · Total coliform began Nov 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 1996 Resolved

Recent enforcement actions

  • State action · SOX Mar 2024
  • State action · SIA Mar 2024
  • State action · SOX Jan 2024
  • State action · SIA Jan 2024
  • State action · SIF Aug 2018
  • State action · SIF Aug 2018
  • State action · SOX Jun 2018
  • State action · SIE Jun 2018

This profile is built from EPA public records for system WI1220117 — 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.