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Water system · PWSID WI6420254

TOMAH WATERWORKS

TOMAH, WI · ~9,192 people served

Check your exact address → TOMAH overview
99
Excellent
PurityRadar safety score

PWSID

WI6420254

State

Wisconsin

City

TOMAH

Population served

9,192

Primary source

Groundwater

Score history

▼ 1 point — the score moved from 100 to 99 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 99

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

PFHxS

Perfluorohexanesulfonic acid

3.2 ppt

limit 10 ppt

Below EPA limit

PFPeA

4.7 ppt

limit —

No federal limit

PFHxA

3.7 ppt

limit —

No federal limit

Violations & enforcement

22

Violations on record

0

Unaddressed

16

Health-based

120

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2018. Official EPA record →

Max contaminant level (MCL) · Uranium health-based began Apr 2018 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2018 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2017 Resolved
Other · EPA contaminant 7500 began Feb 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2016 Resolved
Other · EPA contaminant 7500 began Jul 2016 Resolved
Other · EPA contaminant 7500 began Jul 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2016 Resolved

Recent enforcement actions

  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018

This profile is built from EPA public records for system WI6420254 — 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.