Waste Water Treatment

Welcome to Wastewater Treatment Services

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Industrial Pretreatment Forms   

Wastewater Treatment Services is resp​onsible for the effective collection, treatment and environmentally acceptable discharge of the wastewater generated by the Ann Arbor community as well as portions of Ann Arbor, Pittsfield and Scio townships. Wastewater Treatment Services is responsible for the operation and maintenance of the city's wastewater treatment plant and eight sewage lift stations located around the city. Personnel are in attendance at all times, as the plant is a operation, 24 hours a day, seven days a week.

COVID19 Update 

City of Ann Arbor water system staff are focused on continuing to deliver safe water to our customers for consumption and important daily hygiene. During this unprecedented public health crisis, critical services will continue such as drinking water, waste water, police, fire, emergency operations and waste and recycling pickup.​

Don't flush wipes and beware of FOG

It is m​ore important than ever we take simple steps to help keep plumbing and sewer systems clear of clogs. "Flushable wi​pes" create blockages in household pipes and municipal sewer systems and should never be flushed down the toilet, nor should facial tissue or paper towels. Combined with fats, oil and greases, which should never be poured down the sink, these products can create enormous, and expensive to remove, "fat​ber​gs". ​

This website explains easy ways to help keep the Ann Arbor sewer system efficient and functional. Find out what not to flush, how to deal with fat, oil and greases, and how to prevent sewer pipe penetration.


Facilities Renovations Project (PDF) — This project includes rehabilitating existing structures, upgrading of primary and secondary wastewater treatment processes and replacing aging facilities with new facilities. These renovations will allow the City of Ann Arbor to meet future flow and loading demands, as well as regulatory requirements.

The current WWTP has a design capacity of 29.5 million gallons per day (MGD), and consists of an older West Plant (constructed in the 1930s) and a newer East Plant (constructed in the late 1970s). ​

Industrial Pretreatme​nt Forms

Earl J. Kenzie, P.E.
Wastewater Treatment Manager      Email:  [email protected] 


​49 S. Dixboro Road
Ann Arbor, MI 48105