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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Mark Isaacson, WTD Director

Mark Isaacson, WTD DirectorIn October 2016, Mark Isaacson was appointed the Director of the Wastewater Treatment Division (WTD) in the Department of Natural Resources and Parks.

As the director of the Water and Lands Resources Division (WLRD) for 11 years, Mark has years of experience leading a large number of environmental programs with large capital and operating budgets, and established a very stable organization with multiple revenue streams.

Prior to leading WLRD, Mark was the WLRD assistant division director – and prior to that worked in WTD for three years leading the implementation of the Productivity Initiative.

Mark has a Master of Public Administration degree from the University of Washington and a Bachelor of Environmental Studies degree from the University of California at Santa Barbara.

Mark is well-poised to manage WTD’s 600+ employees as well as an operating budget of $141.4 million and a capital budget of $167.2 million.

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