RSEI Data Dictionary: Aggregated Grid Cell Geographic Microdata

The following tables provide descriptions for each field in each table. Note that for the Geographic Microdata, "Other Geographies" includes block groups, census tracts, and ZIP code files.  For more information, see the RSEI methodology document and the RSEI Microdata documentation. 

Aggregated Geographic Microdata files use the same data as the disaggregated files, but sum the chemical releases over each grid cell. Because the values are summed, unweighted concentrations are not available (the sum of the concentrations of different chemicals would be meaningless).

Naming: These files are named as aggmicroXXXX_YYYY_GCZZ, where XXXX is the reporting year for the data freeze, YYYY is the year of the data contained in the file, and ZZ is the 2-digit grid code .  

Users should note that Geographic Microdata file structures and fields have changed for version 2.3.12. Documentation for previous versions can be found on the Geographic Microdata documentation web page.