MONONA WATERWORKS

MONONA, WI · ~8,624 people served

Check your exact address → MONONA overview

100

Excellent

PurityRadar safety score

PWSID

WI1130245

State

Wisconsin

City

MONONA

Population served

8,624

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

Latest detections from EPA’s UCMR5 monitoring (through Jun 2025). Levels in parts per trillion (ppt).

PFHxS

Perfluorohexanesulfonic acid

5.3 ppt

limit 10 ppt

Near EPA limit

PFBA

11 ppt

limit —

No federal limit

PFBS

5.3 ppt

limit —

No federal limit

PFPeA

4.6 ppt

limit —

No federal limit

PFHxA

4.2 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2007. Official EPA record →

Monitoring & reporting · Total coliform began Sep 2007 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2007 Resolved

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

Recent enforcement actions

State action · SIF Nov 2007
State action · SFG Nov 2007
State action · SOX Nov 2007
State action · SIA Oct 2007
State action · SIE Oct 2007
State action · SIF Mar 1993
State action · SOX Jan 1993
State action · SIE Jan 1993

This profile is built from EPA public records for system WI1130245 — 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.