Description: This layer provides the linework for all flowing non-tidal waters PCBs assessments from the 2016 Integrated Report. Assessment information includes all assessments captured within Maryland's 2016 Integrated Report and are generally displayed according to Categories: impaired and require a TMDL (Category 5), impaired and have a TMDL approved by the Environmental Protection Agency (EPA) (Category 4a), impaired but have exemptions from needing a TMDL (Categories 4b-4c), insufficient data is available to determine if water is meeting all standards (Category 3), are meeting some standards (Category 2), and waters that are meeting all standards (Category 1).
Definition Expression: N/A
Copyright Text: The Maryland Department of the Environment (MDE) acknowledges the U.S. Geological Survey (USGS) which created the National Hydrography Dataset (NHD). The NHD serves as the stream linework for this file and was used to geospatially describe Maryland's water quality assessments for a variety of pollutants. The Maryland Department of the Environment Science Services Administration linked the Integrated Report assessment information to the NHD and then preserved this pollutant-specific layer.
Description: This layer provides the polygonal areas for all impoundments in the state of Maryland for PCBs assessments from the 2016 Integrated Report. Assessment information includes all assessments captured within Maryland's 2016 Integrated Report and are generally displayed according to Categories: impaired and require a TMDL (Category 5), impaired and have a TMDL approved by the Environmental Protection Agency (EPA) (Category 4a), impaired but have exemptions from needing a TMDL (Categories 4b-4c), insufficient data is available to determine if water is meeting all standards (Category 3), are meeting some standards (Category 2), and waters that are meeting all standards (Category 1).
Definition Expression: N/A
Copyright Text: The Maryland Department of the Environment (MDE) acknowledges the U.S. Geological Survey (USGS) which created the National Hydrography Dataset (NHD). The NHD serves as the derivedpolygonal areas for this file and was used to geospatially describe most of Maryland's impoundments; however, MDE had to manually create the boundaries for some impoundments due to the inaccuracies within the NHD. The Maryland Department of the Environment Science Services Administration linked the Integrated Report assessment information to the NHD and then preserved this pollutant-specific layer.
Description: This layer provides generalized PCBs assessments on an 8 digit watershed scale for tidal waters from the 2016 Integrated Report. Assessment information includes all assessments captured within Maryland's 2016 Integrated Report and are generally displayed according to Categories: impaired and require a TMDL (Category 5), impaired and have a TMDL approved by the Environmental Protection Agency (EPA) (Category 4a), impaired but have exemptions from needing a TMDL (Categories 4b-4c), insufficient data is available to determine if water is meeting all standards (Category 3), are meeting some standards (Category 2), and waters that are meeting all standards (Category 1).
Definition Expression: N/A
Copyright Text: The Maryland Department of the Environment (MDE) acknowledges the Department of Natural Resources (DNR) which created the original watershed layer that was altered by MDE Science Service Administration. These files were then linked with the IR assessment information.
Description: Polygon feature class of watersheds with EPA approved PCBs (Polychlorinated Biphenyls) TMDLs. The watershed polygons do not include any upstream drainage areas (i.e., "Upstream LAs" - both inside and outside of Maryland). They only include the watershed areas where applicable WLAs apply.
Definition Expression: N/A
Copyright Text: Maryland Department of the Environment - Science Services Administration, TMDL Development Program
Description: Polygon feature class of watersheds with EPA approved PCBs (Polychlorinated Biphenyls) TMDLs. The watershed polygons do not include any upstream drainage areas (i.e., "Upstream LAs" - both inside and outside of Maryland). They only include the watershed areas where applicable WLAs apply.
Definition Expression: N/A
Copyright Text: Maryland Department of the Environment - Science Services Administration, TMDL Development Program
Description: Polygon feature class of watersheds with EPA approved PCBs (Polychlorinated Biphenyls) TMDLs. The watershed polygons do not include any upstream drainage areas (i.e., "Upstream LAs" - both inside and outside of Maryland). They only include the watershed areas where applicable WLAs apply.
Definition Expression: N/A
Copyright Text: Maryland Department of the Environment - Science Services Administration, TMDL Development Program