PA Department of Environmental ProtectionThese data, offered to provide a spatial representation of standards contained in the Pennsylvania Code. Title 25 Environmental Protection, Department of Environmental Protection, Chapter 93, Water Quality Standards, are current and accurate to the best of our knowledge and are appropriately updated as required. These data should not be substituted for the official version of the standards in the Pennsylvania code. National Hydrography Dataset NHDFlowline layer with a spatial representation of designated water uses defined in Title 25 Environmental Protection, Department of Environmental Protection, Chapter 93, Water Quality Standards. The Pennsylvania Code just cited provides a list of all streams or watersheds (basins) in the state along with their associated designated water uses. This GIS layer displays these uses spatially on an interactive stream map. Public users can drill down to locations on the map to view and map the designated uses of the water bodies of interest. The layer can also be used in conjunction with other spatially referenced data for spatial analyses. When a stream segment has both a use and a special protection, the segment is displayed according to the special protection on eMapPA. For example, a segment that is classified as Cold Water Fish and High Quality Waters (HQ-CWF) will be shown in the High Quality blue-green color. Do not infer water use from stream color; rather, verify water use under the USE_DESCRIPTION field in the attribute table on an identify. When the Streams NHD layer and the Streams Designated Use layer are toggled visible on eMapPA at the same time, they essentially overlap each other. Streams Designated Use has a higher priority in terms of layering, so this layer will be seen on the map. The best practice is to have only one streams layer visible at any given time in order to avoid confusion.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/766b81c5e91441878ec881e3954e254f_163engPennsylvania Department of Environmental ProtectionPublicWater Quality - Chapter 93 Designated Use Streams [Pennsylvania]Web servicesPennsylvaniaLast Modified: 2026-01-08