Subsurface Sewage Treatment Systems (SSTS)

2022 Septic Inspection Communication 

Read the Memorandum (PDF). 

Apply for a Septic Permit

A septic permit is required in Washington County to:

  • Install new septic tanks and/or soil treatment areas.
  • Repair and modify existing systems and components.
  • Change the facility served by the system. Contact Public Health and Environment at 651-430-6655 or via email.

Online Application

Complete a septic application using the online permitting portal. (Not compatible with Internet Explorer.) A "how to" guide is available on the online permitting portal when applying for a septic permit.

Paper Application

If you prefer, download and print a paper application (PDF), and mail to:
Washington County Government Center
Public Health and Environment - Licenses
14949 62nd Street North
P.O. Box 6
Stillwater, MN 55082

Fee Schedule

View the Fee schedule (PDF) online.

  1.  Inspections
  2. Operating Permits
  3. Forms & Resources
  4. Financial Assistance

Installation Inspection

Installation inspections must be scheduled 24 hours prior to work or inspection being done. To schedule an installation call: 651-430-6655 or email.      

Compliance Inspection

Compliance inspections must be performed when a property with septic system is sold. A compliance inspection would not be required by Washington County if:

  • A compliance inspection has been done and filed with Washington County in the last three years.
  • A new or replacement system has been installed and has a certificate of compliance completed in the last five years.

Compliance inspections need to be scheduled with a licensed compliance inspector. Find a licensed inspector through the Minnesota Pollution Control Agency (MPCA).