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blockgroupstats (DATA) residential population and environmental indicators for Census blockgroups

Source: R/data_blockgroupstats.R
blockgroupstats.Rd

This is the dataset of residential population data and environmental indicators used by EJSCREEN. It is a data.table with one row for every US Census blockgroup.

Details

  • Environmental indicators were provided by EPA.

  • Demographics such as percentages are calculated from Census Bureau data from the American Community Survey 5-year summary file, as documented by EJSCREEN.

  • The EJ Indexes (Summary Indexes) are stored in a separate table, bgej

The source of data for each indicator was documented by EJSCREEN, as archived on these pages:

More about blockgroupstats

  • Version 2.32.6 of EJAM used EPA environmental indicators along with population indicators derived from 2018-2022 ACS data. Each year this should be re-created as for the latest version.

  • See attributes(blockgroupstats) to confirm vintage of each dataset

  • Geographic scope includes States, DC, and Puerto Rico (PR), but not any Island Areas (VI, GU, AS, etc.)

  • Column names include bgfips, bgid (for join to blockwts by/on bgid), pop, pctlowinc, etc.

  • For metadata on each column, see map_headernames

  • To see definitions of the columns (indicators) and some basic info on each:

x <- data.frame(
 colname = names(blockgroupstats),
 definition = fixcolnames(names(blockgroupstats), 'r', 'long'),
 varinfo(names(blockgroupstats), info = c("varlist", "varcategory",
 "vartype", "calculation_type", "denominator", "sigfigs", "decimals")))
rownames(x) <- NULL
x[1:20, ]

The columns called arealand and areawater are in square meters, not square miles - to convert units: convert_units(sum( blockgroupstats$arealand) , "sqm", "sqmi") The column called "area" is not used and not documented.

Other key datasets: