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Public Health - Seattle & King County

For septic system professionals

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In Washington State, septic professionals are required to be certified or licensed. Septic professionals perform various types of work on septic systems including design, installation, submission of applications for permit approval or release, septic tank pumping, and maintenance. If you are interested in working within the septic system industry, click on "Certificates of Competency" for qualifications and applications.

Certificates of Competency
Permit information for new septic construction
Forms and applications
Septic system codes
Public Health memos to industry and policies & procedures
As-built drawing search engine (a 'map' of your septic system)
Approved wastewater tanks for onsite septic systems (OSS) (PDF)
Lists of septic professionals
Complete list of Wastewater Program fees