Stormwater Code and Manual Update 2026 - Get Involved

Get Involved

We would like to invite you to participate in the 2026 Stormwater Code and Manual update by attending the public meetings and providing comments during the public comment periods. See below for more information.

Fall Listening Session

The City of Seattle is hosting a fall Listing Session for the Seattle Stormwater Code and Manual, and you are invited to attend!

The fall listening session will clarify the rationale for some of the changes, confirm we understand the comments we received during the first public review, and provide for an open discussion for your questions and feedback. Our goals are to improve the Stormwater Code & Manual and stormwater outcomes while meeting State required mandates. We want to hear your creative solutions and feedback to meet these goals. A summary of our initial responses to public comments we received will be sent out prior to the listening session.

Fall Listening Session Details:

• September 25, 2025 from 1-3 pm (virtual)
• Complete the registration form to attend the meeting

July / August 2025 Public Comment Period for First Draft

The first public review draft comment period was July 8 - August 15, 2025. We have posted the draft documentation on the Project Documents page. See the How to Comment section below for instructions to submit your comments. We'll consider any comments we receive after August 15 as time allows. There will also be a second public review draft this fall or winter. 

July 15 Virtual Public Meeting 

We held a public meeting on July 15 to describe the proposed changes in the 1st draft of the 2026 Stormwater Code and Manual. You can view the meeting at the link below.  

July 15 Public Meeting Recording
 
Transcript of Recording

Future Opportunities to Comment

Another public comment period and other public meetings are planned for the 2nd draft. These are expected to take place at the end of 2025 or beginning of 2026. We will send announcements to the SDCI Stormwater Code email list. If you haven’t already, please subscribe now to receive announcements.

How to Comment: 

You can provide feedback on the draft Seattle Stormwater Code and Manual by:

• Downloading a Stormwater Draft Comment Log spreadsheet
• Adding your comments
• Sending the file to SPUStormwaterCodeRev@seattle.gov

Email correspondence is preferred, but paper comments may also be mailed to: 

Sherell Ehlers
Seattle Public Utilities
700 Fifth Ave, Suite 4400
PO Box 34018
Seattle, WA 98124-4018

When commenting on the Stormwater Code or Manual, please include as much of the following information as you can:

• Number and title of the code or manual section (for example: 22.805.070.D.a or Volume 1, Section 3.2)
• Specific code language you’re suggesting
• Explanation of why the code should be changed

We may not be able to respond to individual comments, but we will take all comments into consideration.

Stay Connected

Sign up for the SDCI Stormwater Code Updates Listserv if you want to get email updates on project milestones, available documents, and upcoming public meetings, or email us at SPUStormwaterCodeRev@seattle.gov. 

You can find information about past public meetings and view their documents on our Background page.