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.
Global: Clean Water Legacy project
Your dollars at work
Funding for this initiative comes from the Clean Water Fund, part of the Clean Water, Land and Legacy Amendment that Minnesotans approved in 2008. The MPCA uses Clean Water Fund dollars to protect, enhance, and restore water quality in lakes, rivers, streams, and groundwater.
Summary of 2025 data
- Data for this report came from 185 local governmental units (LGUs): 86 counties, 67 cities, 29 townships, and three other special purpose units of government with permitting authority.
- Respondents reported a total of 664,554 SSTS across Minnesota, which treat an estimated 45.5 billion gallons of wastewater each year.
- LGUs issued 11,183 SSTS construction permits in 2025 including 7,479 Type I systems.
- Of the permits issued, approximately 55% of the systems were replacement systems and 45% of the systems were new systems.
- LGUs reported 14,014 compliance inspections of existing systems.
- SSTS certification and licensing data is included in the annual report.