Check out these web resources that offer a plethora of runoff-related facts and figures:
American Public Works Association
Blue River Watershed Association
Bridging the Gap
Center for Watershed Protection
Environment Protection Agency
Grow Native
Johnson County K-State Research & Extension Service
Johnson County Stormwater Management Program
Kansas Association for Conservation and Environmental Education
Kansas Department of Health and the Environment
Kansas Department of Wildlife and Parks
Kansas Native Plant Society
Mid-America Regional Council (MARC)
Water Environment Federation