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Water system · PWSID WI7350127

TOMAHAWK WATERWORKS

Tomahawk, WI · ~3,180 people served

Check your exact address → Tomahawk overview
67
Fair
PurityRadar safety score

PWSID

WI7350127

State

Wisconsin

City

Tomahawk

Population served

3,180

Primary source

Groundwater

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

20 ppt

limit 4 ppt

Above EPA limit · 5.0×

PFHxA

7.3 ppt

limit —

No federal limit

PFHpA

6.5 ppt

limit —

No federal limit

PFPeA

6.5 ppt

limit —

No federal limit

PFBA

5.8 ppt

limit —

No federal limit

Violations & enforcement

9

Violations on record

2

Unaddressed

3

Health-based

25

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2012. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Other · EPA contaminant 7500 began Oct 2024 Unaddressed
Other · EPA contaminant 7000 began Oct 2012 Resolved
Other · EPA contaminant 7000 began Jul 2012 Resolved
Other · EPA contaminant 7000 began Oct 2010 Resolved
Other · EPA contaminant 7000 began Jul 2010 Resolved
Other · EPA contaminant 7000 began Jul 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1993 Resolved

Recent enforcement actions

  • State action · SOX Nov 2012
  • State action · SO8 Oct 2012
  • State action · SOX Sep 2012
  • EPA/federal action · EOX Nov 2011
  • State action · SOX Nov 2011
  • State action · SOX Nov 2011
  • EPA/federal action · EFJ Jun 2011
  • State action · SO8 Mar 2011

This profile is built from EPA public records for system WI7350127 — 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.