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, time of transfer information, and frequently asked questions.
Homeowner Maintenance & Requirements
Information regarding homeowner maintenance & requirements. Not all systems within Thurston County require an Operational Certificate (OPC), but if you have a septic system on your property, please see the Care & Maintenance section for important information about living on a Septic System.
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.
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 |