An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Risk-Screening Environmental Indicators (RSEI) Model

RSEI Data Dictionary

This set of tables describes all of the data tables and fields used in EPA's Risk-Screening Environmental Indicators (RSEI) model and results data sets, and is also available in PDF format: RSEI Data Dictionary. Each table listed below comes with information about where it can be found (e.g., in EasyRSEI, or in the Geographic Microdata).

Note that many of these tables link to other tables using keys like FacilityNumber, ChemicalNumber, and ReleaseNumber. The key values change with each version of RSEI, so you must use the same version for all tables, including the Microdata. The only exceptions are the Census Crosswalks, Population data tables, and the Shapefiles, which do not change with each RSEI version (however, they do change occasionally, so you should use the most recent version of each). This version is v.2.3.8 (RY2018). For zip files containing the data tables for older versions, please see the RSEI ftp site.

Additional information can be found in the RSEI methodology document and in the Geographic Microdata documentation.

                            Tables in the RSEI Data Dictionary
  Facility NAICS Submissions Disaggregated Microdata Census Crosswalks
  EPA Program IDs (Reporters) Chemical Releases Aggregated Microdata Population Data
  Offsite MCL Elements Block Group Microdata Shapefiles
  EPA Program IDs (Off-sites) Media Category Water Microdata