This manual, a revision of the Water Environment Federation’s (WEF’s) and the American Society of Civil Engineer’s (ASCE’s) manual of practice (MOP) titled Urban Runoff Quality Management (1998), takes a holistic view and espouses the concept that systems of stormwater controls can be designed to meet the various objectives of stormwater management, including flood control; stream channel protection; groundwater recharge; water quality improvement; protection of public safety, health, and welfare; and multipurpose public benefits such as the provision of open space, parks, playgrounds, trails, wildlife habitat, and enhancement of property values. This MOP focuses on consolidating technologies under a comprehensive view of stormwater management in an attempt to foster convergence between traditional stormwater controls and green infrastructure. Developed by WEF and ASCE.