One of the most important socio-economic status (SES) indicators is the amount of income a household earns. This variable is important in tracking environmental justice (EJ) population disparities. Low-income was defined as the percent of a block groups population where household income is less than or equal to twice the federally defined “poverty level." 1,2
The source data for the demographic index are gathered from the Census Bureau population and demographic characteristics. Percent low-income is all residents where household income is below twice the federally defined poverty threshold, as a percentage of all those for whom this poverty ratio could be determined (typically known for the vast majority of the block group’s population).
The MSA level value is the unweighted mean of the values of all block groups in the MSA.
- Low income = percent low-income population.
This indicator was calculated by the U.S. Environmental Protection Agency (EPA) using data from the sources listed below.
- U.S. EPA, Environmental Justice (EJ) Screen, 2016.
- U.S. Census Bureau, American Community Survey (ACS), 5-Year Estimates, 2014.