Bioretention System Resources
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Find information on bioretention systems and other ways to detain and infiltrate water here.
In Washington State, bioretention systems differ from rain gardens. The distinction comes from the National Pollutant Discharge Elimination System permits (NPDES) –bioretention systems are sized for specific treatment and flow control objectives and are constructed based on principles of engineering design. Refer to the first resource listed below for Washington State bioretention system specifics.
2019 Stormwater Manual For Western Washington, BMP T7.30: Bioretention – Bioretention section from the stormwater manual for all of Western Washington.
Bioretention Basics – A brief overview of the components to a bioretention system.
Bioretention Details – In-depth information about bioretention systems from the Minnesota Stormwater Manual.