Updating Stormwater Regulations - What & Why

What’s Happening Now?

The draft documents of the 2021 Stormwater Code and Manual, supporting documentation, and other related project code changes are available for your review on the project documents page. The official public review period for these documents was April 1 - May 16, 2020. However, we're still accepting feedback. We'll hold another official comment period in the Fall / Winter of 2020.

We recently held 2 online public meetings: April 26 and May 6, 2020. If you missed them, watch our recording of the April 26 meeting and take a look at the PowerPoint!

Our proposed 2021 Stormwater Code and Manual update is scheduled to be effective in July 2021. Our new rules will replace the current Stormwater code and Directors' Rules, which are administered jointly by SDCI and Seattle Public Utilities (SPU). For more information, visit our background page.

As part of this process, we will be holding public meetings during three separate timeframes:

  • Spring of 2020 - Prior to submittal of the Draft Stormwater Code and Manual to Ecology
  • Fall / Winter of 2020 - After Ecology comments are received on Draft Stormwater Code and Manual
  • Spring 2021 - City Council Public Meeting

Project Benefits

Our stormwater code protects people, property, and the environment by controlling how rain that beomes stormwater runsoff flows off of streets, buildings, and parking lots. Stormwater runoff can cause flooding, landslides, and erosion that can damage our homes, businesses, and property. Stormwater runoff carries oil and grease, fertilizers, pesticides and other toxic chemicals to our creeks, lakes, bays, rivers, and other waterways.

The End Result

Our regulations will be equivalent to Ecology's 2019 Stormwater Manual and address concerns and topics identified by internal and external stakeholders.