This EPA site provides links to a sampling of select LID design manuals from throughout the nation.
Many states, counties, and non-profits have developed stormwater design manuals emphasizing green infrastructure approaches (also referred to as low impact development or environmental site design). This site provides links to a small sample of these design manuals selected from throughout the nation. Each manual includes detailed design guidelines tailored to the local physical and regulatory landscape. In general, each manual addresses planning and design approaches as well as structural stormwater controls. (Undated) US EPA.