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Septic Tank Inspection in Olympia, WA

Check the tank, accessible equipment and records. For a home sale, ask about Thurston County’s separate Time of Transfer process.

Washington generally requires inspections at least every three years for tank-plus-gravity-soil systems and annually for other systems. Local requirements can be stricter. Follow the operational certificate and manufacturer’s plan.

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Know the System

Find the record drawing, permitted bedrooms and treatment type before inspecting.

Look Beyond the Tank

Check accessible baffles, filters, pumps and alarms. Agree on excavation or testing before the visit.

Selling a Septic Property

Thurston’s Time of Transfer process requires inspection and all tanks pumped within the previous 12 months before application. Confirm the full current process.

Keep the Reports

Professionals submit inspection reports to OnlineRME. Save your own copies and repair records.

Follow the Right Schedule

A pump-out receipt does not replace an inspection report, operational certificate renewal or a buyer’s agreed inspection scope.

Read our Olympia septic sizing, materials and care guide.

Septic Tank Inspection FAQs

Practical answers for Olympia homes and businesses.

Is pumping the same as inspection?

No. Pumping removes waste; inspection assesses condition and operation.

Does a private report replace Time of Transfer?

No. Complete the County’s required process and documents for the sale.

A Clear Plan for Your Septic System.

Tell us where you are, what is happening and the service you need.

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