Smart Sponge has been approved by the RPA to treat stormwater run-off.  Its antimicrobial capability are effective in reducing coliform bacteria found in stormwater.  This technology will address one of the largest sources of water pollution in the U.S.  This surprisingly is responsible for 20,000 beach closures per year! This product was also used in the Gulf of Mexico oil spill as well.  Check it the AbTech Industries website if your interested in this product.

http://www.waterworld.com/index/display/article-display/9482180565/articles/waterworld/stormwater-ubanwater/stormwater-management/2010/08/Stormwater-runoff-treatment-technology-approved-by-EPA.html

AbTech Industries Website

http://www.abtechindustries.com/