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Stormwater Code & Rules Update

An Example of Stormwater Control Methods
Our Stormwater Code protects people, property, and the environment by controlling how rain water runs off of streets, buildings, and parking lots.
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What’s Happening Now?

City Council has scheduled a public hearing on the 2016 Stormwater Code Update for Friday, September 11, 2015. The hearing is scheduled for 2:00 p.m. in Seattle City Hall Council Chambers. This is your chance to let us know what you think about the 2016 Stormwater Code update. The draft documents and other project applicability code changes are available for your review on the project documents page.

Our official public comment period on the draft 2016 Stormwater Code ended on June 30, 2015. However, we will continue to take comments until we send final recommendations to the Mayor for transmittal to the City Council. There is more information on how to comment on our get involved page.

There will also be an opportunity to provide public comment on the draft 2016 Stormwater Manual. We are holding a public meeting about the 2016 Stormwater Manual on Wednesday, September 30, 2015. This meeting is scheduled from 4:30 to 6:30 p.m. in Room 2240 on the 22nd Floor of the Seattle Municipal Tower (700 5th Avenue). The final draft of the 2016 Stormwater Manual will be available on our project documents page prior to the meeting on September 30.

Our proposed 2016 Stormwater Code and Manual update is scheduled to be effective in January 2016. Our new rules will replace the current Stormwater Code and Directors' Rules, which are administered jointly by us and Seattle Public Utilities (SPU). For more information, visit our background page. For more information on how to comment, visit our get involved page.

Project Benefits

Our stormwater code protects people, property, and the environment by controlling how rain water runs 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 2014 Stormwater Manual and will address the following topics:

  • Improve stormwater management for new development in Seattle, including green stormwater infrastructure
  • Improve the Construction Site Stormwater Runoff Controls requirements
  • Clarify Pollution Prevention, Good Housekeeping, and Operation and Maintenance
  • Update the Source Control and Water Quality Treatment Practices

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