In accordance with WAC 246-272A-0230, on-site sewage systems may only be designed by professional engineers, licensed under chapter 18.43 RCW, or on-site sewage treatment system designers, licensed under chapter 18.210 RCW.
The health district does not license on-site sewage system design professionals or engineers and does not verify license status on a continuous basis. Designers of on-site sewage systems must have an On-site Wastewater Treatment System Designers license from the Department of Licensing to operate in Washington state.
To check the license status of a designer or engineer, visit the Washington State Department of Licensing website.
The health district also maintains a list of local licensed designers for convenience. It consists of individuals and companies that requested inclusion after being licensed. Spokane Regional Health District does not endorse, recommend, or warrant the work of any design professional or engineer. This list is provided for informational purposes only.
Current On-Site Sewage System Designers List*
*Designers seeking inclusion on the SRHD designers list may contact SRHD at liquidwaste@srhd.org for instructions. Please be prepared to provide proof of Washington state licensure.
Did you miss the February meetings for on-site sewage system designers, engineers and installers? Watch the presentation on important updates to the SRHD application and permitting process here.
