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Water system · PWSID WI1140154

THERESA WATERWORKS

THERESA, WI · ~1,262 people served

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

PWSID

WI1140154

State

Wisconsin

City

THERESA

Population served

1,262

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

64

Violations on record

2

Unaddressed

3

Health-based

48

Enforcement actions

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

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Other · EPA contaminant 7500 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 0400 health-based began Sep 2025 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Other · EPA contaminant 7000 began Jul 2019 Resolved
Other · EPA contaminant 7500 began Oct 2018 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2018 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2018 Resolved
Monitoring · Lead & Copper Rule began Sep 2017 Resolved

Recent enforcement actions

  • State action · SIA Sep 2025
  • State action · SOX Sep 2025
  • State action · SOX Dec 2019
  • State action · SIF Dec 2019
  • State action · SIA Nov 2019
  • State action · SFJ Sep 2019
  • State action · SOX Sep 2019
  • State action · SOX Jul 2019

This profile is built from EPA public records for system WI1140154 — 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.