Stormwater

In Ann Arbor, all stormwater (and any pollutants carried by storm water) are discharged, untreated, to the Huron River and its tributaries.​

The stormwater drainage infrastructure in Ann Arbor includes:

• Over 540 miles of stormwater conveyance system.
• Over 23,000 inlets and catch basins.​

The system is managed by multiple owners and operators including the City of Ann Arbor, Washtenaw County and the University of Michigan.