Septic Systems
For information regarding Septic Systems, please select from the options below:
Septic Systems Permits & Resources
Click here to learn more about septic system permitting resources, applications for new on-site septic systems and repairs.
Care & Maintenance of Your Septic System
Learn important information on how to care, maintain, and protect a Septic System.
Homeowner Maintenance & Requirements
Homeowner maintenance & requirements - not all systems within Thurston County require an Operational Certificate (OPC).
Hiring a Septic Professional
Environmental Health maintains current lists of septic system professionals certified to perform services in Thurston County. Although we strive to keep these lists current, we recommend you check with your contractor to make sure they are still certified.
Information & Guidance for Septic Professionals
Septic Professional, Septic Vendors, Thurston County List of Septic Professionals. Information geared to people wanting to be certified in Thurston County to operate as a septic designer, installer, monitoring specialist or pumper.
Time of Transfer
Septic Systems in Thurston County are required to go through the Time of Transfer process when selling a home. The Time of Transfer process requires the septic system to be pumped and inspected by a Thurston County certified septic system professional prior to application submittal.
Frequently Asked Questions
Frequently Asked Questions about septic systems, time of transfer, maintenance & care, and more.
Contact our department or email us at environmental_health@co.thurston.wa.us if you have additional questions.
Building Development Center | (360)-786-5490 | Craft 3 Loan | (360)-867-2170 |
General Questions/Failing System | (360)-867-2673 | Operation and Maintenance | (360)-867-2626 |
Septic Help Line | (360)-867-2669 | Septic, Land Use, and Drinking Water | eh_tech@co.thurston.wa.us |