District's Renewed Stormwater Permit Mandates Green Roofs, On-Site Retention

摘要

Stormwater management techniques such as vegetated roofs and rainfall retention on properties for at least 24 hours must be deployed in the District of Columbia, under terms of the district's renewed municipal separate storm sewer system permit approved Oct. 5 by the Environmental Protection Agency. EPA Region III announced its approval of the permit, which replaces a permit issued in 2004.