Sewage tanks product registration

The 2008 and 2011 rule amendments included changes made to Minn. R. ch. 7080 to ensure that sewage tanks installed in Minnesota are being designed and constructed properly.  Specifically, there are additional requirements for tanks to verify that they have adequate structural integrity, and that they are constructed to be watertight.

The tank is a watertight vessel that provides settling of solids, solidification of oils and scum, and allows the effluent to discharge to a succeeding tank, treatment device, or soil dispersal system. If a tank is not watertight it can be considered a direct sewage discharge to the ground water, which can negatively impact the environment and human health.

The MPCA will maintain a list of registered precast tanks that have been documented to our staff to adequately meet the Minn. R. 7080.2010 requirements. Only tanks that are registered with the Minnesota Pollution Control Agency (MPCA) may be used. Sewage tank manufacturers can submit their 'SSTS Application for Sewage Tank Listing' (see below under 'Forms for Sewage Tanks'), along with required information, to be placed on the 'List of Registered SSTS Sewage Tanks' if the requirements for tank registration are met. Tank manufacturers must submit the required data and verifications to be placed on the list of registered sewage tanks. The list will be posted when tank information is received and reviewed.

Sewage tanks include the following types of tanks: Septic tanks, Trash tanks, Holding tanks, Pump tanks, Surge storage tanks, Recirculation tanks and other processing tanks. The "List of Registered SSTS Sewage Tanks," and other related information, is provided on this web page.

Correspondence to SSTS practitioners

PDF icon SSTS installer letter (wq-wwists2-45)

This letter was sent to licensed SSTS installers and local units of government. It states that only registered sewage tanks can now be installed in Minnesota, beginning January 1, 2013. The only exception is for tanks that are designed by a licensed professional engineer and approved by the local permitting authority for use in a specific system. (March 27, 2013)

Listing of SSTS sewage tanks

PDF icon List of registered SSTS sewage tanks (wq-wwists1-25)

Current list of sewage tanks registered for subsurface sewage treatment systems (SSTS) in Minnesota. The list contains detailed model information, by manufacturer, for septic, trash, holding, pump, surge, recirculating and other processing tanks.

PDF icon At-a-glance listing of registered sewage tanks (wq-wwists1-25a)

A quick reference guide to sewage tanks registered for subsurface sewage treatment systems (SSTS) in Minnesota.

Fact sheets and technical documents

Forms for sewage tanks


For more information regarding sewage tanks and tank testing, please contact Corey Hower at 507-206-2603,