Subsurface Sewage Treatment Systems (SSTS)

Apply For a Septic Permit


  • Complete a septic application using the online permitting portal under the SSTS Licenses and Permits tab. A paper application is also available.
  • A septic permit is required in Washington County when:
    • Installing new septic tanks and/or soil treatment areas (drainfields, at-grades and mounds)
    • All repair/modification of existing systems and components.
    • Changes in the facility served by the system may trigger a permit and the Department should be contacted at 651-430-6655 or via email.

Financial Assistance for Your Septic System


Compliance Inspections


  • A compliance inspection is required prior to the transfer of real property.
  • A compliance inspection may be required when changing the facility served by the system (renovation/addition).
  • A compliance inspection must be done by a licensed inspector.

View Information on Your Septic System


  • Search for information on your septic system using our online portal by hovering over the reports tab at the top and then clicking on search.

Apply For a Permit to Land Apply Septage


  • Complete an application to land apply septage in Washington County.
    • A permit to land apply septage is required for every parcel that will be applied to; contiguous parcels will be permitted together.

Manage Your Operating Permit


  • Enter monitoring data or other information regarding your operating permit using the online permitting portal under the Operating Permits tab.

Forms and Resources


SSTS Records and Risk Assessment Project

In 2017, the county received a Clean Water Fund grant to conduct a records catalog and risk assessment. The CWF grant is for $100,000, with a 25% match, and it ends December 2019. The grant workplan includes: 1) collection and digitation of remaining paper records, including those from cities, 2) conducting a risk assessment countywide, using available data. The risk assessment will be a tool for county and local partners for prioritizing resources and assisting county and local officials with future planning. 2017 CWF Report

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