skip to main content

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

Environmental documents available for public review  

This page lists environmental documents prepared by the King County Wastewater Treatment Division that are currently available for public review. You may view and download an electronic copy of each listed document by clicking on the associated link. The listed documents are mainly threshold determinations and checklists prepared under the Washington State Environmental Policy Act (SEPA statute, RCW 43.21C; SEPA Rules, WAC 197-11). Other environmental documents prepared by the Wastewater Treatment Division, such as documents prepared under the National Environmental Policy Act (NEPA), may also be listed.

Information on how to provide comments on each document listed below is included in the document. The document, including this information, may be viewed by clicking on the link provided for the document.

Environmental documents currently available for review


  • The documents listed on this page may be viewed using a PDF viewer.
  • Only documents currently available for public comment are listed. If the list is empty, no documents are currently available for comment.
Summary of proposed project Closing date for public comments Contact for further information Document (PDF) More information (Project Web site, if available)



Local, state and federal regulations mandate the ways in which agencies must notify the public that environmental documents are available for public comment. These may include mailings, signs and/or newspaper notices. The Wastewater Treatment Division typically makes the documents available in local libraries and upon request. This web site is another way in which the division provides notice and copies of these documents.

Related information