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Water system · PWSID WI4050453

DE PERE WATERWORKS SA 1

DE PERE, WI · ~25,660 people served

Check your exact address → DE PERE overview
100
Excellent
PurityRadar safety score

PWSID

WI4050453

State

Wisconsin

City

DE PERE

Population served

25,660

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

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

22

Violations on record

0

Unaddressed

20

Health-based

278

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2016. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2015 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2015 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Oct 2001 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Oct 2001 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2001 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2001 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2001 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2001 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2001 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2001 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2000 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2000 Resolved

Recent enforcement actions

  • State action · SIF Jun 2016
  • State action · SOX Oct 2015
  • State action · SIE Sep 2015
  • State action · SIA Sep 2015
  • State action · SOX Aug 2007
  • State action · SOX Aug 2007
  • State action · SOX Aug 2007
  • State action · SOX Aug 2007

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 Nov 2021

0.56 · max 9.5 mg/l as N · 37

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 WI4050453 — 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.