NEPAssist Mapping Layer Descriptions:

The below provides basic descriptions for the data included in the mapping layers available through NEPAssist. Be sure to use the appropriate metadata (data layer title, source and date) when citing the source of your supporting data.

EPA Facilities

Water Monitors

Places

Transportation

Water Features

NonAttainment Areas

Boundaries

Demographics Data

Soil Survey Map

Critical Habitat

NWI Wetlands

FEMA Flood

National Land Cover

EPA Facilities

The below includes information EPA collects through various databases about facilities or sites subject to environmental regulation.

Hazardous Waste (RCRAInfo)

Description: Hazardous waste information contained in the Resource Conservation and Recovery Act Information (RCRAInfo) includes an inventory on all generators, transporters, treaters, storers, and disposers of hazardous waste that are required to provide information about their activities.

Source: EPA's Envirofacts

Date: Refer to the Envirofacts Data Update for RCRAInfo

Air Pollution (ICIS-AIR)

Description: The air pollution data (ICIS-AIR) contains compliance and permit data for stationary sources of air pollution (such as electric power plants, steel mills, factories, and universities) regulated by EPA, state and local air pollution agencies. The information in ICIS-AIR is used by the states to prepare State Implementation Plans (SIPs) and to track the compliance status of point sources with various regulatory programs under Clean Air Act.

Source: EPA's Envirofacts

Date: Refer to the Envirofacts Data Update for ICIS-AIR

Water Dischargers (NPDES)

Description: As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating sources, such as municipal and industrial wastewater treatment facilities, that discharge pollutants into waters of the United States. EPA tracks water discharge permits through the Permit Compliance System (PCS) and Integrated Compliance Information System (ICIS) databases, which includes information on when a permit was issued and when it expires, how much the company is permitted to discharge, and the actual monitoring data showing what the company has discharged.

Source: EPA's Envirofacts

Date: Refer to the Envirofacts Data Update for NPDES

Toxic Releases (TRI)

Description: The Toxics Release Inventory (TRI) contains information on toxic chemical releases and waste management activities reported annually by certain industries as well as federal facilities. The database also contains links to compliance and enforcement information.

Source: EPA's Envirofacts

Date: Refer to the Envirofacts Data Update for TRI

Superfund (NPL)

Description: The Superfund Enterprise Management System (SEMS) provides information regarding sites under the Comprehensive Environmental Response, Compensation, and Liability Act -- otherwise known as CERCLA or Superfund. CERCLA provides a Federal "Superfund" to locate, investigate, and clean up uncontrolled or abandoned hazardous-waste sites as well as accidents, spills, and other emergency releases of pollutants and contaminants into the environment. The National Priorities List (NPL) is the list of national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories.

Source: EPA's Envirofacts

Date: Refer to the Envirofacts Data Update for SEMS

Brownfields (ACRES)

Description: The Assessment, Cleanup and Redevelopment Exchange System (ACRES) captures grantee reported data on environmental activities and accomplishments (assessment, cleanup and redevelopment), funding, job training, and details on cooperative partners and leveraging efforts for the Brownfields Program. The information in ACRES is provided at the property and grant level.

Source: EPA's Envirofacts

Date: Refer to Envirofacts Data Update for ACRES

RADInfo

Description: The Radiation Information Database (RADInfo) contains information about facilities that are regulated by U.S. Environmental Protection Agency (EPA) regulations for radiation and radioactivity.

Source: EPA's Envirofacts

Date: Refer to Envirofacts Data Update for RADInfo

Toxic Substances Control Act (TSCA)

Description: The Toxic Substances Control Act of 1976 provides EPA with authority to require reporting, record-keeping and testing requirements, and restrictions relating to chemical substances and/or mixtures. Certain substances are generally excluded from TSCA, including, among others, food, drugs, cosmetics and pesticides. TSCA addresses the production, importation, use, and disposal of specific chemicals including polychlorinated biphenyls (PCBs), asbestos, radon and lead-based paint.

Source: EPA's Envirofacts

Date: Refer to Envirofacts Data Update

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Water Monitors

USGS Water Monitors (NWIS)

Description: The USGS Water Monitors layer is retrieved in real-time from the United States Geological Survey (USGS) National Water Information System (NWIS). The NWIS service provides current conditions from selected surface water, ground water, and water quality sites.

Source: U.S. Geological Survey National Water Information System (NWIS)

Date: See source metadata by following the Source link above for the latest date information.

EPA Water Monitors (STORET)

Description: Water quality monitoring information comes from EPA's Storage and Retrieval (STORET) System, a repository of physical, chemical and biological monitoring data from state and federal agencies, watershed organizations, volunteer groups and many others. Surface water, Ground water, and Others are general categories for more specific STORET Station Types.

Source: EPA's Storage and Retrieval (STORET) System

Date: See source metadata by following the Source link above for the latest date information.

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Places

National Register of Historic Places

Description: The National Register of Historic Places is the official list of the nation's historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Register is the official Federal list of districts, sites, buildings, structures, and objects significant in American history, architecture, archeology, engineering, and culture. The National Register is managed and maintained by the National Park Service (NPS) and directed by the Keeper of the National Register. The National Register layer is downloaded from the NPS National Register of Historic Places KML files.

Source: U.S. Department of the Interior National Park Service

Spatial Metadata: National Register of Historic Places

Date: See the source metadata by following the Source link above for the latest date information.

Schools

Description: Point locations for educational facilities in the USA, including buildings or groups of buildings used as an institution for study, teaching, and learning (e.g., academy, college, high school, university).

Source: U.S. Geological Survey Geographic Names Information System (GNIS)

Spatial Metadata: Schools

Date: See source metadata by following the Source link above for the latest date information.

Places of Worship

Description: Point locations for buildings used for religious worship (e.g., chapel, mosque, synagogue, tabernacle, or temple).

Source: U.S. Geological Survey Geographic Names Information System (GNIS)

Spatial Metadata: Worship Places

Date: See source metadata by following the Source link above for the latest date information.

Hospitals

Description: Point locations for buildings where the sick or injured may receive medical or surgical attention (e.g., infirmary, clinic).

Source: U.S. Geological Survey Geographic Names Information System (GNIS)

Spatial Metadata: Hospitals

Date: See source metadata by following the Source link above for the latest date information.

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Transportation

Airport Points

Description: The Airport layer includes points for landing facilities in the United States that were provided and maintained by the Federal Aviation Administration.

Source: National Transportation Atlas Database

Spatial Metadata: Airports Point

Date: See Spatial Metadata above for the latest date information.

Airport Polygons

Description: The Airport Polygons layer includes airport boundaries and airport runways within the United States.

Source: National Transportation Atlas Database

Spatial Metadata: Airports Polygon

Date: See Spatial Metadata above for the latest date information.

Railroads

Description: The Railroads layer includes linear features representing the United State's railway system. The Railroads layer is provided and maintained by the Federal Railroad Administration.

Source: National Transportation Atlas Database

Spatial Metadata: Railroads

Date: See Spatial Metadata above for the latest date information.

Water Features

Impaired Streams

Description: The Impaired Streams layer includes streams that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These streams are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL).

Source: EPA Office of Wetlands, Oceans, and Watersheds (OWOW)

Spatial Metadata: Impaired Streams

Date: 2009

Impaired Water Bodies

Description: The Impaired Water Bodies layer includes bodies of water that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water bodies are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL).

Source: EPA Office of Wetlands, Oceans, and Watersheds (OWOW)

Spatial Metadata: Impaired Water Bodies

Date: 2009

Streams

Description: The Streams layer includes linear surface water features throughout the United States. The streams layer is based on the National Hydrography Dataset (NHD).

Source: EPA Office of Water

Spatial Metadata: Streams

Date: 2005

Water Bodies

Description: The Water Bodies layer includes area surface features such as ponds, lakes and wide rivers. The water bodies layer is from U.S. Census Bureau TIGER/Line data.

Source: U.S. Census Bureau

Spatial Metadata: Water Bodies

Date: 2010

Sole Source Aquifers

Description: The Sole Source Aquifer layer includes information on the sole source aquifers (SSA) designated by EPA under section 1424(e) of the Safe Drinking Water Act of 1974. SSA's supply at least 50 percent of the drinking water consumed in the area overlying the aquifer. These areas may have no alternative drinking water source(s) that could physically, legally and economically supply all those who depend on the aquifer for drinking water.

Source: Data.gov

Spatial Metadata: Sole Source Aquifers

Date: 2009

Watershed (HUC12)

Description: The Watershed (HUC12) layer includes a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States.

Source: U.S. Department of Agriculture, Natural Resources Conservation Service

Spatial Metadata: Watershed (HUC12)

Date: 2009

Watershed (HUC8)

Description: The Watershed (HUC8) layer is a complete digital hydrologic unit boundary layer to Catalog Unit (8-digit) for the entire United States, Puerto Rico and the U.S. Virgin Islands.

Source: National Atlas of the United States

Spatial Metadata: Watershed (HUC8)

Date: 2005

Wild and Scenic Rivers

Description: The Wild and Scenic Rivers layer includes segments of the National Wild and Scenic River System for the United States. The National Wild and Scenic Rivers Act protects wild rivers and scenic rivers from development that would substantially change their wild or scenic nature. The act was signed into law on October 2, 1968. Selected rivers in the United States are preserved for possessing outstandingly remarkable scenic, recreational, geologic, fish and wildlife, historic, cultural, or other similar values. Rivers, or sections of rivers, so designated are preserved in their free-flowing condition and are not dammed or otherwise impeded. National Wild and Scenic Rivers are each managed by one or more agencies of the federal or state government. For the full listing of designated Wild and Scenic Rivers, complete with mileage, classifications and managing agencies, view the Wild and Scenic Rivers Table

Source: National Wild and Scenic Rivers System

Spatial Metadata: Wild and Scenic Rivers (Contiguous) Wild and Scenic Rivers (Alaska)

Date: See source metadata by following the Source link above for the latest date information.

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NonAttainment Areas

Ozone 8-hr (1997 standard)

Description: Ozone 8-hr (1997 standard)

Source and Spatial Metadata: Ozone 8-hr (1997 standard)

Date: See source metadata by following the Source link above for the latest date information.

Ozone 8-hr (2008 standard)

Description: Ozone 8-hr (2008 standard)

Source and Spatial Metadata: Ozone 8-hr (2008 standard)

Date: See source metadata by following the Source link above for the latest date information.

Lead (2008 standard)

Description: Lead (2008 standard)

Source and Spatial Metadata: Lead (2008 standard)

Date: See source metadata by following the Source link above for the latest date information.

SO2 1-hr (2010 standard)

Description: SO2 1-hr (2010 standard)

Source and Spatial Metadata: SO2 1-hr (2010 standard)

Date: See source metadata by following the Source link above for the latest date information.

PM2.5 24hr (2006 standard)

Description: PM2.5 24hr (2006 standard)

Source and Spatial Metadata: PM2.5 24hr (2006 standard)

Date: See source metadata by following the Source link above for the latest date information.

PM2.5 Annual (1997 standard)

Description: PM2.5 Annual (1997 standard)

Source and Spatial Metadata: PM2.5 Annual (1997 standard)

Date: See source metadata by following the Source link above for the latest date information.

PM2.5 Annual (2012 standard)

Description: PM2.5 Annual (2012 standard)

Source and Spatial Metadata: PM2.5 Annual (2012 standard)

Date: See source metadata by following the Source link above for the latest date information.

PM10 (1987 standard)

Description: PM10 (1987 standard)

Source and Spatial Metadata: PM10 (1987 standard)

Date: See source metadata by following the Source link above for the latest date information.

Boundaries

Zip Codes

Description: The Zip Codes layer provides information and identifies each postal delivery area in the United States.

Source: Tele Atlas/Tom Tom

Spatial Metadata: Zip Codes

Date: See Spatial Metadata link above for the latest date information.

Congressional Districts

Description: The Congressional Districts layer includes information on the 114th Congressional Districts of the United States, Puerto Rico, and the U.S. Virgin Islands.

Source: National Atlas of the United States

Spatial Metadata: Congressional Districts

Date: See Spatial Metadata link above for the latest date information.

City Boundaries

Description: The City Boundaries layer includes incorporated cities and Census Designated Places from the U.S. Census Bureau TIGER/Line data.

Source: U.S. Census Bureau

Spatial Metadata: City Boundaries

Date: See Spatial Metadata link above for the latest date information.

Urbanized Areas

Description: Urbanized Areas are derived from the 2014 U.S. Census Bureau TIGER/Line Urban Areas. Urbanized Areas are contiguous areas of populations greater then 50,000.

Source: U.S. Census Bureau

Spatial Metadata: Urbanized Areas

Date: See Spatial Metadata link above for the latest date information.

Federal Lands

Description: The Federal Lands layer includes information on lands owned or administered by the Federal government. This layer is downloaded from the U.S. Geological Survey (USGS).

Source: National Atlas of the United States

Spatial Metadata: Federal Lands

Date: See Spatial Metadata link above for the latest date information.

Townships Boundary

Description: The Townships Boundary layer portrays the Public Land Survey System boundaries of the United States to the township level. This layer is downloaded from the U.S. Geological Survey (USGS).

Source: National Atlas of the United States

Spatial Metadata: Townships Boundary

Date: See Spatial Metadata link above for the latest date information.

Counties

Description: The Counties layer portrays the county boundaries of the United States.

Source: U.S. Census Bureau

Spatial Metadata: Counties

Date: See Spatial Metadata link above for the latest date information.

States

Description: The State layer provides state boundaries of the United States.

Source: U.S. Census Bureau

Spatial Metadata: States

Date: See Spatial Metadata link above for the latest date information.

EPA Regions

Description: The EPA Regions layer includes EPA Administrative Region boundaries derived from State boundaries.

Source: EPA Office of Environmental Information (OEI)

Spatial Metadata: EPA Regions

Date: See Spatial Metadata link above for the latest date information.

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Demographics Data

Demographics information is available to add to the NEPAssist map under the “More Data” button. You may click on the associated button to see metadata for that data layer. Please see the Census Bureau website for more explanations regarding Census Bureau data from the full 2000 Census Summary File 3 (SF3) estimates, the 2010 Census Summary File 1 (SF1) 100% count data, and the annual American Community Survey (ACS) estimates using the 2010-2014 ACS 5-Year Summary database. Please note that all variables that show the percent rather than count were derived from count-based Census variables using the standard approach of count divided by total population of the population in question.

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Soil Survey Map

Description: USDA/NRCS SSURGO: This layer shows the Soil Survey Geographic (SSURGO) by the United States Department of Agriculture's Natural Resources Conservation Service. It also shows data that was developed by the National Cooperative Soil Survey and supersedes the State Soil Geographic (STATSGO) dataset published in 1994.

Source and Spatial Metadata: USDA Natural Resources Conservation Service

Date: See source metadata by following the Source link above for the latest date information.

NWI Wetlands

Description: The NWI Wetlands layer includes information from the National Wetland Inventory (NWI) which was established by the U.S. Fish and Wildlife Service (FWS) to conduct a nationwide inventory of U.S. wetlands to provide biologists and others with information on the distribution and type of wetlands to aid in conservation efforts.

Source: U.S. Fish and Wildlife Service NWI Wetlands

Spatial Metadata: NWI Wetlands

Date: See Spatial Metadata above for the latest date information.

Critical Habitat

Description: The Critical Habitat layer includes critical habitat designated by the U.S. Fish and Wildlife Service for all threatened species and endangered species under the Endangered Species Act, with certain specified exceptions. Critical habitat is a habitat area essential to the conservation of a listed species, though the area need not actually be occupied by the species at the time it is designated. It is important to understand that the designated critical habitat that is displayed in the map does not represent all of the critical habitat designated by the U.S. Fish & Wildlife Service. For complete information about all species with designated critical habitat, go to the Critical Habitat Data folder on the U.S. Fish & Wildlife Service Critical Habitat Portal.

Source: U.S. Fish and Wildlife Service

Spatial Metadata: Critical Habitat Portal

Date: See Spatial Metadata above for the latest date information.

FEMA Flood

Description:The FEMA Flood layer represents Flood Insurance Rate Map (FIRM) data important for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP) provided by the Federal Emergency Management Agency (FEMA). The National Flood Hazard Layer (NFHL) data present the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications.

Source and Spatial Metadata: FEMA's National Flood Hazard Layer

Date: See source metadata by following the Source link above for the latest date information.

National Land Cover

Description: The National Land Cover layer includes information from the National Land Cover Database (NLCD) which includes land cover classification schemes and quantifies land cover change for the conterminous U.S. between the years 1992 to 2011.

Source and Spatial Metadata: U.S. Geological Survey

Date: 2011

 

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