We've made some changes to EPA.gov. 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.

EPA's website will operate in a diminished capacity on Saturday Feb 17, 2018 from 8:00 a.m. to noon EST for routine maintenance. Some services, such as search, may be temporarily unavailable for brief periods during this time. We apologize for any inconvenience.

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 Data Dictionary applies to RSEI Version 2.3.6. There have been some small changes from the data dictionary for Version 2.3.5. Be sure to use the version of the Data Dictionary that is consistent with the version of the data you are using.

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

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