Annual septage disposal permit form

Information about the King County septage disposal facility, including how to get permitted, acceptable wastes, directions, and the septage disposal process.

Steps and information on how to get permitted to dispose of domestic (residential) and non-domestic (commercial) septage.

A description of the types of septage that are accepted and not accepted at the septage disposal facility.

Information on the 2022 rates and fees to dispose of septage at the septage disposal facility at South Treatment Plant.

Detailed driving directions on how to get to the septage treatment facility at South Treatment Plant.

Information on what to expect when you get to the septage disposal facility, including the process of disposing of septage and amenities we offer at the facility.

The annual meeting is for Septage Haulers to be informed of program requirements and updates. King County staff are available to answer questions.