Local governments with SSTS programs submit information to the MPCA each year by February 1 on SSTS permitting and compliance trends for the previous calendar year. The information helps the agency with long-range planning efforts.

Summary of 2020 data

  • 203 local governmental units (LGUs) submitted data for the report, including 86 counties, 79 cities, 34 townships, and 4 other special purpose units of government with permitting authority.
  • Respondents reported a total of 618,102 sub-surface treatment systems across Minnesota, which treat an estimated 42.3 billion gallons of wastewater each year.
  • LGUs issued 12,368 construction permits for 5,185 new systems and 7,183 replacement systems in 2020.
  • Of the permits issued, 97% were for residential dwellings and 3% were for other establishments.
  • LGUs reported 15,764 compliance inspections of existing systems.
  • LGUs estimated that 81% (505,300) of SSTS in Minnesota comply with applicable rules and function properly.
  • SSTS certification and licensing data is included in the 2020 SSTS Annual Report.

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