Septic System Design Forms

Our office recommends you open and then save a copy of the form to your local computer as a PDF before completing application.

The most current version of Adobe Reader is recommended for full functionality. If you choose to complete application in the browser, functionality will be limited. Internet Explorer is recommended.

Design Forms

  1. Cass County Holding Tank Design Form (Fillable PDF)
  2. Cass County Mound Design Form (Fillable PDF)
  3. Cass County Pressure Bed-Trench with Pump Design Form (Fillable PDF)
  4. Cass County Privy Design Form (Fillable PDF)
  5. Cass County Trench-Seepage Bed Design Form (Fillable PDF)

In accordance with Minnesota Pollution Control Agency Rules Section 7082:

  • Septage Hauling/Maintainers Agreement is required for Privy and Holding Tank Designs.
  • Subsurface Septic Treatment System (SSTS) Management Plan is required for all Designs.
  • View a Sample SSTS Management Plan (PDF).

Additional Resources for SSTS Professionals