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On-site sewage certifications

Find information about certifications related to on-site sewage/septic systems.

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Certification requirements

Download septic/sewage industry certification requirements (178 KB)

On-site sewage system designers

These licenses are provided through the Washington State Department of Licensing. For more information,

Visit the Board of Registration for Professional Engineers & Land Surveyors

Certifications offered by King County

Associate/Master Installer

Learn about the on-site sewage Associate and Master Installer certifications.

On-site System Maintainer

Find information about the On-site Sewage System Maintainer certification.

Liquid Waste Pumper/Hauler

Learn about the Liquid Waste Pumper/Hauler certification.

Related Topics

OSS industry resources

Find resources for sewage/septic professionals.
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