This layer displays reading proficiency rates for counties and school districts across the United States. Data are acquired from the US Department of Education (ED) EdFacts 2015-16 data tables. Z-Scores are calculated for counties within states displaying the magnitude of each county’s deviation above or below the state average.
Population Change, 2018 by County, Population Estimates and Components of Change 2016-2018
The Census Bureau’s Population Estimates Program (PEP) produces estimates of the population for the United States, its states, counties, cities, and towns, as well as for the Commonwealth of Puerto Rico and its municipios. Demographic components of population change (births, deaths, and migration) are produced at the national, state, and county levels of geography. Additionally, housing unit estimates are produced for the nation, states, and counties.
PEP annually utilizes current data on births, deaths, and migration to calculate population change since the most recent decennial census and produce a time series of estimates of population, demographic components of change, and housing units. The annual time series of estimates begins with the most recent decennial census data and extends to the vintage year.
Electric Substations
This feature class/shapefile represents electric power substations primarily associated with electric power transmission. In this layer, substations are considered facilities and equipment that switch, transform, or regulate electric power at voltages equal to, or greater than, 69 kilovolts. Substations with a maximum operating voltage less than 69 kilovolts may be included, depending on the availability of authoritative sources, but coverage of these features should not be considered complete. The Substations feature class/shapefile includes taps, a location where power on a transmission line is tapped by another transmission line.
National Land Cover Dataset
The National Land Cover Database (NLCD) serves as the definitive Landsat-based, 30-meter resolution, land cover database for the Nation. NLCD provides spatial reference and descriptive data for characteristics of the land surface such as thematic class (for example, urban, agriculture, and forest), percent impervious surface, and percent tree canopy cover. NLCD supports a wide variety of Federal, State, local, and nongovernmental applications that seek to assess ecosystem status and health, understand the spatial patterns of biodiversity, predict effects of climate change, and develop land management policy. NLCD products are created by the Multi-Resolution Land Characteristics (MRLC) Consortium, a partnership of Federal agencies led by the U.S. Geological Survey.
Power Plants
This feature class/shapefile represents electric power plants. Power plants are all the land and land rights, structures and improvements, boiler or reactor vessel equipment, engines and engine-driven generators, turbo generator units, accessory electric equipment, and miscellaneous power plant equipment are grouped together for each individual facility.
Toxic Release Inventory by County
This layer displays the amount of toxic releases based on the Environmental Protection Agency (EPA) Toxics Release Inventory (TRI), a national program which tracks the management of over 650 toxic chemicals that pose a threat to human health and the environment. Facilities must report how each chemical is managed through recycling, energy recovery, treatment, and releases to the environment. A “release” of a chemical means that it is emitted to the air or water, or placed in some type of land disposal. The information submitted by facilities to the EPA and states is compiled annually as the Toxics Release Inventory or TRI, and is stored in a publicly accessible database ( Envirofacts. For more information, please visit the EPA Toxics Release Inventory web page.
Statistics of Income from the IRS
Layers display ZIP code and county-level information about tax returns filed in 2016, including the number and percentage of returns claiming Earned Income Tax Credits. Data is acquired through the IRS IRS County Data.
High-Speed Internet, Maximum Download Speeds
This layer displays the maximum advertised download speed available from fixed internet (DSL, cable, fiber, etc.) and terrestrial/fixed wireless internet providers. Data are from the August, 2019 release of the Federal Communication Commission (FCC) Fixed Broadband Deployment Dataset and reflect conditions as of June 2018. Data are reported by census block (centroid).
Access to Fiber Internet
This layer displays the percentage of population with access to fiber internet. Data are from the August, 2019 release of the Federal Communication Commission (FCC) Fixed Broadband Deployment Dataset and reflect conditions as of June 2018. Data are available by county, census tract, and census block group. Values are population-weighted; calculations do not include cellular internet providers.
FEMA Flood Hazard Zones
The Flood Hazard Zones are extracted from the National Flood Hazard Layer, which is a database that contains FEMA’s flood hazard map data. The database contains flood hazard information and supporting data used to develop the information. The primary flood hazard classification is indicated in the Flood Hazard Zones layer.
Flood zones are geographic areas that FEMA has defined according to varying levels of flood risk and type of flooding. For complete information about different flood zone designations, please visit the Definitions of FEMA Flood Zones web page.
Flood Hazard Zone Descriptions:
Floodway: The stream channel and that portion of the adjacent floodplain which must remain open to permit passage of the base flood.
1% Annual Chance Flood Zone: The 100-year or base floodplain.
0.2% Annual Chance Flood Zone: Area of moderate flood hazard, usually the area between the limits of the 100-year and 500-year floodplains, but also shallow flooding areas (< 1 foot) or flood zones for small drainage areas (< 1 square mile).
Area with Reduced Risk Due to Levee: Areas protected by levees from the 100-year flood.
1% Annual Chance Future Considerations: The 100-year floodplain based on anticipated future land-use conditions.
Area of Undetermined Hazard: Area of undetermined but possible flood hazard, typically occurring in counties with partial flood studies.
This information was acquired by state-level release February, 2020. Data release dates by state range from December 07, 2016 (Vermont) to February 12, 2020 (Utah).