ANN ARBOR

ANN ARBOR, MI · ~123,851 people served

Check your exact address → ANN ARBOR overview

100

Excellent

PurityRadar safety score

PWSID

MI0000220

State

Michigan

City

ANN ARBOR

Population served

123,851

Primary source

Surface water

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

PFBA

6.1 ppt

limit —

No federal limit

PFPeA

4.7 ppt

limit —

No federal limit

PFHxA

3.5 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2017. Official EPA record →

Monitoring & reporting · EPA contaminant 3015 began Nov 2016 Resolved

Monitoring & reporting · Bromate began Jan 2011 Resolved

Monitoring & reporting · EPA contaminant 2033 began Jan 2008 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jan 2008 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jul 2006 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jun 2006 Resolved

Monitoring & reporting · EPA contaminant 0300 began Sep 2005 Resolved

Monitoring & reporting · EPA contaminant 1011 began Jul 2004 Resolved

Monitoring & reporting · EPA contaminant 0300 began Sep 2003 Resolved

Monitoring & reporting · EPA contaminant 0300 began Aug 2003 Resolved

Monitoring & reporting · Total coliform began Apr 2003 Resolved

Monitoring & reporting · Total coliform began Jul 2002 Resolved

Recent enforcement actions

State action · SIE Jan 2017
State action · SIA Jan 2017
State action · SOX Nov 2016
State action · SIF Oct 2011
State action · SOX Mar 2011
State action · SIE Mar 2011
State action · SIA Mar 2011
State action · SOX Jun 2009

This profile is built from EPA public records for system MI0000220 — 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.