Our proposed 2016 Stormwater Code and Manual will be effective on January 1, 2016. Our new rules will replace the current Stormwater Code and Directors' Rules, which are administered jointly by us and Seattle Public Utilities (SPU).
The final 2016 Stormwater Code and 2016 Stormwater Manual, Volumes 1 through 5 and appendices, also referred to as Directors' Rule DPD 21-2015/SPU DWW 200, are available on our Project Documents page.
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.
Our regulations will be equivalent to Ecology's 2014 Stormwater Manual and will address the following topics: