Urban stormwater retrofits are a major component of many stormwater management efforts. They are a diverse group of practices that provide pollution reduction from existing development that is either currently untreated or is inadequately treated by existing stormwater practices. Examples of retrofits include wet ponds, swales, permeable pavement, and bioretention.

Below, you’ll find a variety of resources on stormwater retrofits, including the Expert Panel report that reviews all of the available science on the pollutant removal performance and runoff reduction capability of the BMPs, and CSN’s Urban Stormwater Retrofits “Fact Sheet” which breaks down the practice and the Expert Panel recommendations into more easily digestible pieces!



Fact Sheet: Retrofits


Urban Stormwater Retrofits Final Report(s)

Final CBP Approved Expert Panel Report on Stormwater Retrofits
Frequently Asked Questions for Stormwater Performance Standards and Retrofit Expert Panel Reports

Training Resources

The following training resources have been created for explaining the panel recommendations – enjoy!

[Webcast] Retrofitting Revisited

Urban BMPS and the Bay TMDL Webcast

Stormwater Retrofits to Maximize Nutrient Reduction