The Arkansas Department of Environmental Quality has released the 2008 Impaired Waterbodies (303(d) List) shapefiles to GeoStor. The 2008 Impaired Waterbodies list includes the category 4a streams and lakes and the category 5 streams and lakes. This list has been formatted to reflect the guidance issued by the Environmental Protection Agency (EPA) for the development of the Integrated Water Quality Monitoring and Assessment Report. These shapefiles consist of subsets from the National Hydrography Dataset (NHD) Medium Resolution (1:100,000) Flowlines and Areas. The purpose of these datasets is to provide a cartographic representation of the streams and lakes in the 4a and 5 categories.
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