OSSEO WATERWORKS

OSSEO, WI · ~1,701 people served

Check your exact address → OSSEO overview

100

Excellent

PurityRadar safety score

PWSID

WI6620328

State

Wisconsin

City

OSSEO

Population served

1,701

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 Dec 2010. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2008 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2008 Resolved

Monitoring & reporting · Total coliform began Dec 1998 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 1996 Resolved

Recent enforcement actions

State action · SIF Dec 2010
State action · SIA Dec 2010
State action · SIE Dec 2010
State action · SOX Oct 2010
State action · SIA Oct 2010
State action · SFG Mar 1999
State action · SIA Feb 1999
State action · SIE Feb 1999

This profile is built from EPA public records for system WI6620328 — 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.