About MSD

The Metropolitan Sewer District of Greater Cincinnati (MSD) is a public wastewater utility. Below is a glimpse of MSD by the numbers:

Service Area

  • 4 counties, including most of Hamilton, as well as parts of Butler, Clermont, and Warren.
  • 290+ square-mile service area

Collection System

  • 200,000 separate sewer connections
  • 3,000 miles of sanitary and combined sewers
  • 120+ pump stations

Treatment System

  • 184 million gallons of wastewater treated each day
  • 7 major wastewater treatment plants
  • 3 additional package treatment plants


  • 230,000 residential and commercial users
  • 200 industrial users

Learn more about doing your part to keep your sewer system running smoothly, by checking out our video and playing the game.