This web map displays sites where the performance of BMPs and LID approaches for controlling stormwater runoff have been monitored and reported on. The data come from the International Stormwater BMP Database. Exit EPA Icon. Click for more information. Information for each site includes the type of BMP or LID approach utilized, the amount of stormwater volume reduction achieved (where available), and select soil, land cover, water table and climatic properties. Each site also contains a link back to the database where more detailed information on the site and its performance can be found.