Subsurface Sewage Treatment Systems (SSTS)

2023 Septic Inspection Communication 

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).

  1.  Inspections

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).

  1. Operating Permits
  1. Forms & Resources
  1. Financial Assistance