The Empire Wastewater Treatment Facility in Empire Township of Dakota County was built in 1979. It currently has a design capacity of 24 million gallons per day. The facility stopped discharging into the Vermillion River in 2008, and instead the effluent is now diverted through a pipe to the Mississippi River. To inquire about data from the facility, please contact Ricky Arora, Manager Process Information at (651) 602-8191 or Ricky.Arora@metc.state.mn.us.