PaSTW’s purpose is to integrate state-of-the-art science and sound engineering practice into Pennsylvania’s stormwater management designs. One of our missions is to provide engineering, ecologic, pedologic and hydrogeologic guidance so that designers and reviewers can better utilize the Pennsylvania Stormwater Best Management Practices Manual. We provide recommendations to DEP to help form a sound stormwater policy that better reflects current engineering and scientific practices. Each of several sub-committees is responsible to review, understand, update, and defend one or more sections of the BMP manual. All members are stormwater professionals and work within a sub-committee.