JEFFERSON WATERWORKS

JEFFERSON, WI · ~7,926 people served

Check your exact address → JEFFERSON overview

100

Excellent

PurityRadar safety score

PWSID

WI1280104

State

Wisconsin

City

JEFFERSON

Population served

7,926

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7500 began May 2010 Unaddressed

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved

Max contaminant level (MCL) · Gross alpha health-based began Jan 2010 Resolved

Max contaminant level (MCL) · Gross alpha health-based began Apr 2009 Resolved

Monitoring & reporting · Total coliform began Mar 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 1993 Resolved

Treatment technique · Lead & Copper Rule health-based began Jan 1993 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1992 Resolved

Max contaminant level (MCL) · Uranium health-based began Jul 1986 Resolved

Recent enforcement actions

State action · SOX Nov 2024
State action · SIA Nov 2024
State action · SOX Mar 2013
State action · SOX May 2011
State action · SFL Aug 2010
State action · SO8 May 2010
State action · SFL Oct 2009
State action · SIB Jul 2009

This profile is built from EPA public records for system WI1280104 — 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.