The Stormwater, Grading and Drainage Control Code (SMC 22.800-22.808) and associated Directors’ Rules are being revised to account for advances in urban stormwater runoff management practices. These regulations are in place to protect life, property, public health and the environment from the adverse impacts of urban stormwater runoff. Adverse impacts can include flooding, pollution, landslides and erosion.

Changes and updates to the code are being made to make it equivalent to the 2005 Washington Department of Ecology’s Stormwater Management Manual for Western Washington. This is a requirement for compliance with the Municipal Stormwater NPDES Permit, which was issued January 17, 2007.