Environmental Health
Septic Systems
  Septic Systems (Onsite Sewage Systems)  

Staff Availability for Questions

Environmental Health staff are available for questions about land use, septic systems, or wells at the Permit Assistance Center Monday thru Friday from 8 AM to 4:00 PM. For additional contact information, click here.

Septic System Permit Search

Permitting & Septic Information [PDF], contains link to website to search for information and contact phone numbers.

Current Permit Info Lookup current permit status for Septic and Landuse Projects.
Historic Septic Permit Info You will need your permit, project, or parcel number to complete the search.

Operation & Maintenance

Learn to properly operate and maintain your septic system.

Septic System Videos

Types of Septic Systems

Find out about the different types of septic systems.

Time of Transfer

Requirements for properties with on-site sewage systems when sold or transferred...more

Septic System Professionals

Operational Certificates

Thurston County requires certain types of septic systems to have Operational Certificates. Find out what is needed to renew the certificate. ...more

Financial Assistance Low-Interest Loans and Grant Programs

Administers several low-interest loan and grant programs to help residents who live in shellfish protection areas or need financial assistance to maintain existing systems and repair failing systems. ...more


Issues permits for new septic systems or when repairs to an existing system are needed. Currently under construction.

Educational Materials / Workshops

List of publications, workshops, and other information for septic system owners....more

FAQs - Frequently Asked Questions

Find the answers to common questions. ...more

Onsite Septic System Owner Education Project

Link to Final Report

Hot Topics
Popular Pages & Links
OSS Forms
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  • Septic Help Line
    (leave message)
  • General Questions
  • Henderson Watershed Protection Area O&M Questions
  • Building Development Center
  • Failing Systems
  • Loan Program
    (failing systems only)
  • Brochures & Workshops
This page last updated: 03/30/18