Welcome!

This is the Engage Ann Arbor site for the city's Water Distribution Plan. The City of Ann Arbor maintains a water distribution system dating back to the late 1800's serving residents and businesses of Ann Arbor as well as the University of Michigan, Scio Township and Ann Arbor Township

Learn More!

Drinking water is drawn from both surface and groundwater sources and treated at the Water Treatment Plant (WTP). Downstream of the city's WTP there are:

  • 4 remote pumping stations
  • 6 storage tanks
  • Nearly 500 miles of water pipes

To provide the highest quality drinking water, it's critical for the city to review and evaluate the conditions and capacity of the system on a regular basis.

In March 2024, the city launched an update to its comprehensive water distribution plan, which is used to strategically plan and budget for improvements, ensure a sustainable and resilient water system now and into the future, as well as evaluate current practices and ensure preparedness for emergencies. The update of the hydraulic model aims to mirror the real-life dynamics of the city's water system, providing an invaluable tool to inform decisions.

A comprehensive water distribution plan and hydraulic model was previously developed in 2010 and has continued to be updated. This project will build upon what was previously developed and incorporate the multiple projects and studies that have been completed since that time.

Work is currently underway and is expected to continue through early 2026. The city has engaged OHM Advisors to conduct the plan update and model.

Educational Videos

Ann Arbor Water: The World Beneath Your Feet

Project Materials and Resources

​Ann Arbor Water Strategic Plan one-page​r

Ann Arbor Water Strategic Plan one-pager (PDF)

Council Presentation

On April 27th, a Utility Infrastructure Planning presentation was given during the City Council Work Session.

  • Presentation (PDF)
  • Key Takeaways
    1. There is room for growth.
    2. The most pressing constraint is the sanitary collection system in the South/Southeast part of the city.
    3. Long term source water, water treatment, distribution system, and wastewater treatment constraints if growth is significant.
    4. Specific recommendations will be in the final reports by end of fiscal year.
    5. Some recommended improvements will be needed regardless of growth; other projects can wait and see if needed.