ANN ARBOR, MI · Washtenaw County

ANN ARBOR Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)

Violation history

Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2011 – March 21, 2011
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 1996 – June 30, 1996
Resolved
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
March 1, 1994 – March 31, 1994
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
January 1, 2011 – March 21, 2011	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
June 1, 1996 – June 30, 1996	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 1994 – December 31, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
March 1, 1994 – March 31, 1994	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

November 30, 2016State Compliance achieved5 linked violations
November 26, 2008State Public Notification requested8 linked violations
January 8, 2008State Compliance achieved14 linked violations
July 28, 2006State Public Notification requested4 linked violations
October 3, 2005State Violation/Reminder Notice32 linked violations
October 13, 2003State no additional Formal Action needed15 linked violations
July 23, 2003State Public Notification received3 linked violations
August 14, 2002State Public Notification requested11 linked violations
March 14, 2002State Violation/Reminder Notice15 linked violations
July 1, 1996State Compliance achieved10 linked violations
April 3, 1994State Public Notification received8 linked violations

Contact

MACIEJEWSKI, MOLLY

734-794-6000

ANN ARBOR, MI 48103