Is ANN ARBOR required to publish a Consumer Confidence Report?

Yes. ANN ARBOR is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is ANN ARBOR’s next Consumer Confidence Report due?

ANN ARBOR’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

ANN ARBOR, MI · Washtenaw County

ANN ARBOR Water System

Consumer Confidence Report status

ANN ARBOR must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for ANN ARBOR.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Michigan’s official records. Always confirm current status with Michigan before making decisions based on this information.

System facts

System ID (PWSID): MI0000220
System type: Community Water System
Population served: 123,851
Service connections: 26,050
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

ANN ARBOR is among the 7 largest community water systems in Michigan, serving 123,851 people from surface water.

As of August 1, 2026, its federal record holds 4 entries between 1993 and 1995, all of which EPA lists as closed. Nothing has been added since 1995.

None of the 4 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Surface Water Treatment Rules.

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 1995 – May 31, 1995
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 1995 – March 31, 1995
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1994 – December 31, 1994
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 1993 – November 30, 1993
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 1995 – May 31, 1995	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 1995 – March 31, 1995	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 1994 – December 31, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
November 1, 1993 – November 30, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

March 17, 2011State Public Notification requested6 linked violations
November 26, 2008State Administrative Penalty assessed8 linked violations
August 25, 2006State Public Notification received6 linked violations
September 7, 2005State Compliance achieved3 linked violations
October 13, 2003State Violation/Reminder Notice7 linked violations
June 29, 1993State Administrative/Compliance Order without penalty issued19 linked violations

Common questions

Is ANN ARBOR required to publish a Consumer Confidence Report?: Yes. ANN ARBOR is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is ANN ARBOR’s next Consumer Confidence Report due?: ANN ARBOR’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does ANN ARBOR have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for ANN ARBOR.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MACIEJEWSKI, MOLLY

734-794-6000

ANN ARBOR, MI 48103