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2018 Social Vulnerability Index (SVI). Created by the Centers for Disease Control and Prevention (CDC) / Agency for Toxic Substances and Disease Registry (ATSDR) / Geospatial Research, Analysis, and Services Program (GRASP). A brief summary of the item is not available. Add a brief summary about the item.

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Item created: Mar 16, 2020 Item updated: Oct 6, 2021 View count: 15,577,187

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Description

  • This feature layer visualizes the 2018 overall SVI for U.S. counties and tracts
  • Social Vulnerability Index (SVI) indicates the relative vulnerability of every U.S. county and tract

  • 15 social factors grouped into four major themes

  • Index value calculated for each county for the 15 social factors, four major themes, and the overall rank
What is CDC Social Vulnerability Index?
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) has created a tool to help emergency response planners and public health officials identify and map the communities that will most likely need support before, during, and after a hazardous event.

The Social Vulnerability Index (SVI) uses U.S. Census data to determine the social vulnerability of every county and tract. CDC SVI ranks each county and tract on 15 social factors, including poverty, lack of vehicle access, and crowded housing, and groups them into four related themes:
  • Socioeconomic
  • Housing Composition and Disability
  • Minority Status and Language
  • Housing and Transportation 
Variables
For a detailed description of variable uses, please refer to the full SVI 2018 documentation.

Rankings
We ranked counties and tracts for the entire United States against one another.  This feature layer can be used for mapping and analysis of relative vulnerability of counties in multiple states, or across the U.S. as a whole. Rankings are based on percentiles. Percentile ranking values range from 0 to 1, with higher values indicating greater vulnerability. For each county and tract, we generated its percentile rank among all counties and tracts for 1) the fifteen individual variables, 2) the four themes, and 3) its overall position. 

Overall Rankings:
We totaled the sums for each theme, ordered the counties, and then calculated overall percentile rankings. Please note:  taking the sum of the sums for each theme is the same as summing individual variable rankings.

The overall tract summary ranking variable is RPL_THEMES. 

Theme rankings:
For each of the four themes, we summed the percentiles for the variables comprising each theme. We ordered the summed percentiles for each theme to determine theme-specific percentile rankings. The four summary theme ranking variables are: 
  • Socioeconomic theme - RPL_THEME1
  • Housing Composition and Disability - RPL_THEME2
  • Minority Status & Language - RPL_THEME3
  • Housing & Transportation - RPL_THEME4

Flags
Counties in the top 10%, i.e., at the 90th percentile of values, are given a value of 1 to indicate high vulnerability.  Counties below the 90th percentile are given a value of 0.  For a theme, the flag value is the number of flags for variables comprising the theme. We calculated the overall flag value for each county as the total number of all variable flags. 

An in-depth description of the item is not available.

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These data are available to the public at large with no constraints or limitations. If used, please reference the Centers for Disease Control and Prevention/ Agency for Toxic Substances and Disease Registry/ Geospatial Research, Analysis, and Services Program. For more information please see the SVI website or contact the SVI Coordinator.

No special restrictions or limitations on using the item's content have been provided.

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          Data updated: Sep 18, 2023, 7:29 PM

          Schema updated: Sep 18, 2023, 7:29 PM

          Size: 338.867 MB

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          ID: cbd68d9887574a10bc89ea4efe2b8087

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          SVI, CDC, ATSDR, social vulnerability, social vulnerability index, vulnerable populations, at risk populations, USA, tract, county, 2018, GRASP, American Community Survey

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          Centers for Disease Control and Prevention/ Agency for Toxic Substances and Disease Registry/ Geospatial Research, Analysis, and Services Program

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          Data Last Updated: Jul 12, 2023, 5:56 PM

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            Summary

            ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) has created a tool to help emergency response planners and public health officials identify and map the communities that will most likely need support before, during, and after a hazardous event. The Social Vulnerability Index (SVI) uses U.S. Census data to determine the social vulnerability of every county and tract. CDC SVI ranks each county and tract on 15 social factors, including poverty, lack of vehicle access, and crowded housing, and groups them into four related themes: Socioeconomic Housing Composition and Disability Minority Status and Language Housing and Transportation

            A summary of the layer is not available.

            Updating item...

            Description

            This feature layer visualizes the 2018 overall SVI for U.S. counties and tracts

            Social Vulnerability Index (SVI) indicates the relative vulnerability of every U.S. county and tract

            15 social factors grouped into four major themes

            Index value calculated for each county for the 15 social factors, four major themes, and the overall rank

            An in-depth description of the layer is not available.

            Updating item...

            Credits (Attribution)

            No acknowledgements.

            Centers for Disease Control and Prevention/ Agency for Toxic Substances and Disease Registry/ Geospatial Research, Analysis, and Services Program

            Updating item...
            Details

            Data updated: Sep 18, 2023, 7:29 PM

            Schema updated: Sep 18, 2023, 7:29 PM

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