The Milwaukee Metropolitan Sewerage District (MMSD) cleans billions of gallons of wastewater every year, safeguarding natural resources and protecting public health for 28 communities in southeastern Wisconsin. We treat a range of wastewater sources from industrial to surface runoff and whatever water you send down the drain at home, work, school or church.

Learn more about the various aspects of MMSD Wastewater Treatment below:

• Treatment Process - The four stages to cleaning wastewater
• Deep Tunnel - Learn why we need deep tunnels, how they work and where they're located in our system.
• Overflows - Why do overflows happen? We address the issue.
• Sewers - How many miles of laterals, city sanitary sewers, regional sewers and Deep Tunnels are there anyway?
• Tours - Tour the Jones Island Water Reclamation Facility in Milwaukee!
• 2014 Discharge Permit - The rules from our state and federal regulators.

The Jones Island Water Reclamation Facility