EPA And Partners Installing Three Trash Traps In St. Louis Streams The Trash-Free St. Louis Project will show how solving marine debris starts inland EPA Region 7’s Trash-Free Waters program, along with Wichita State University’s Environmental Finance Center and the Missouri Confluence Waterkeeper organization, are working with local community groups on a project to install and maintain three trash traps in St. Louis area streams. A stream trash trap is a mechanical system that includes a floating boom and net that funnel and gather floating debris near embankments, canals, or stormwater outfalls before it can reach primary waterways like streams, rivers, lakes and oceans.