Public Access is Closed to Most County Facilities Due to COVID-19.

In response to Governor Inslee's Stay Home, Stay Healthy order, Thurston County has moved to an essential services model, in effect
through Monday, May 4, 2020. Courts and other elected offices may operate under different hours or restrictions.

(For more information on essential functions, visit:
(For office contacts, visit:

Septic Self-Inspection Certification Workshop Signup
Due to concerns about COVID-19, workshop registrations should be considered tentative, please check our website the week of your scheduled workshop for the current status at that time. If your operational certificate is due before the next scheduled workshop please either arrange to have a septic professional conduct the inspection or email our office to request an extension.
You can email your request to

Become certified to do your own septic system inspections!

Certification Qualifications:

  1. Own property in the Henderson OR Nisqually Reach Watershed Protection Area, and;
  2. Have one of the following septic system types:
    • Conventional gravity
    • Pressure distribution
    • Mound
    • GlendonĀ® Biofilter

FREE One-day Workshop

When: The First Friday or Saturday from 9 am - 2:30 pm   (see sign-up below for dates)

Where:  Public Health Bldg, 412 Lilly Road NE   (near St. Peter's Hospital)

Bring your lunch, there will be a 30-minute break
NOTE: Part of the class is outside, please dress accordingly.

Attendees will receive:

  • Certification to inspect your septic system
  • $10 off next septic tank pump-out
  • $50 riser rebate(s)

To register or if you want to check if you are qualified, call Susan at 360-867-2645.

NOTE: Space is limited. If you are registered for a class and are unable to attend, please contact us as soon as possible, so we can free up your space for others.