Thurston County regulations require an Operational Certificate [PDF], issued by Thurston County Health Department, for certain types of septic (on-site sewage) systems. The goal of the Operational Certificate is to assure that septic systems are properly operated and maintained. Properly monitored and maintained systems have longer operating lives and less impact on our water resources. The Certificate lists the required conditions for monitoring and maintaining your sewage system (check your Certificate for specific requirements that apply to your system).

What Do I Need to Renew the Certificate?

Prior to your renewal date, you will receive a Septic System Operational Certificate Renewal packet, which includes:

• Renewal application form
• Renewal fee invoice
• Copy of expired operational certificate
• Several brochures on inspecting and pumping your septic tank

Septic System Inspection

Part of the renewal process includes inspecting the septic system. There are three elements that can be done by you, a certified septic tank pumper [PDF], or a certified monitoring specialist [PDF].

1. Inspect the septic tank and have it pumped or repaired, as necessary. A pumper or specialist can do this, or you may inspect the tank, using the "stick test" (see Inspecting Your Septic Tank). If the scum and/or sludge levels indicate, the tank should be pumped (see Septic Inspection & Pumping Guide [PDF]). NOTE: If you are unsure of where your septic tank or drainfield is located, see Locate Your Drainfield.
2. Inspect the drainfield area. Look for signs of failure, note any wet spots, seeps (algae and drainage on banks or slopes), or areas where water is surfacing.
3. Inspect other system components — such as pump, distribution box, and monitoring ports. Look for indications that the pump system is malfunctioning, such as sewage backing up in the house, high liquid levels in the septic tank, or surfacing sewage over/near the pump chamber.

What If I Don't Renew My Certificate?

If you fail to renew your Certificate, your sewage system will be classified as non-conforming. This means other permit approvals can be withheld until the Certificate is renewed.

The certification renewal process for non-conforming systems requires an inspection of the system by an employee of Environmental Health after additional fees are paid. By keeping your Certificate renewed on a timely basis, you can avoid the additional renewal fees and untimely delays during future building projects or property sales.