An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Risk-Screening Environmental Indicators (RSEI) Model

Ways to Get RSEI Results

The Risk-Screening Environmental Indicators (RSEI) model produces several different sets of results, and distributes them in different ways. This page provides links and details for some of the basic ways to get RSEI results, including EasyRSEI, the RSEI results map, and Envirofacts.

On this page:

Sign up to get periodic updates about RSEI :

What's new in the latest version of RSEI: Version 2.3.9 (RY2019)

Each new version of RSEI incorporates the latest Toxics Release Inventory (TRI) data, as well as changes to the input data and the methodology used to process the data and present the results. The following changes were made in Version 2.3.9, released in January 2021:

  • Includes TRI Reporting Years 1988-2019.
  • Toxicity weights have been updated with the most recent toxicity data.


EasyRSEI is an easy-to-use web dashboard that you can access through your browser with no download required. EasyRSEI contains results for the kinds of releases modeled by EPA's Risk-Screening Environmental Indicators (RSEI) model for Toxics Release Inventory (TRI) reporting years 2007-2019. A separate dashboard is available for users interested in all years of data.

Learn more about EasyRSEI

Top of Page

RSEI Geographic Microdata

Raw RSEI model data (also known as RSEI-GM, or Geographic Microdata) for air releases, include concentrations, toxicity-weighted concentrations, and RSEI Scores for each 810 meter by 810 meter grid cell in the United States (by year). The disaggregated Microdata are very large, and contain multiple release records for each grid cell. The aggregated Microdata are a smaller dataset, and summarize impacts over all releases and chemicals for each grid cell. For some update years, additional data sets at various geographies and all years are also produced. Users should select the most recent version that contains the desired data years/geographies. Data years from different versions cannot be combined.

RSEI Version 2.3.8 (RY2018) (1988-2018, by year)

  • An extended Microdata dataset was produced for Version 2.3.8, including all data years (1988-2018) at the grid cell, block group, ZIP code, and census tract levels. Use the Contact Us form to request data.

RSEI Version 2.3.9 (RY2019) (2017-2019, by year)

  • The last three years of Microdata are available on the RSEI ftp site. ExitUsers interested in the most recent three years of data should use this set. Version 2.3.8 should be used only for longer time series or earlier years of data.

Microdata users are advised to first carefully read the RSEI Geographic Microdata documentation. Use the Contact Us form if you have additional questions regarding the RSEI Microdata.

Top of Page

Other ways to access RSEI results

Envirofacts. Facility-specific RSEI reports are available as part of the TRI view of Envirofacts. Once you have done a TRI search, on the Search Results page, click on the “Report” link in the “Risk Screening” column for that facility. You can enter any place name or ZIP code in the box below to perform a TRI search.

CalEnviroScreenExit CalEnviroScreen is a screening methodology that can be used to help identify California communities that are disproportionately burdened by multiple sources of pollution. CalEPA has used the tool to designate California communities as disadvantaged pursuant to Senate Bill 535.

Toxic100Exit An index that uses RSEI Scores aggregated to the parent company level to identify the top U.S. air polluters among the world's largest corporations.

Studies Using RSEI. RSEI is often used in academic studies, particularly for environmental justice analyses. The RSEI bibliography contains a partial list of studies and books that include RSEI data.

Top of Page

Other RSEI results products to download

RSEI Queries. A small Microsoft Access database containing sample queries that allow users to extract data directly from the facility-level RSEI tables, which are distributed in separate relational database. Users must have Microsoft Access 2007 or later, at least 2 GB RAM and at least 4 GB of hard drive space. RSEI Queries is for users already familiar with RSEI and Access, who have specific data needs that are not met with EasyRSEI, and who know generally which datasets they want. Click the link below to download a zipped file containing both databases and a help function with additional information on how to access the data. RSEI Queries V2.3.8 contains TRI data from 1988 through 2018, as frozen in the fall of 2019 for the TRI National Analysis dataset.  RSEI Queries is available on the RSEI ftp site.EXIT

RSEI CSV files.This is the same facility-level data as in RSEI Queries, but the format is a series of comma delimited (CSV) files. The RSEI data dictionary describes each table and field, and contains links to download each table in CSV and Microsoft Excel formats. RSEI CSV files are also available on the RSEI ftp site.Exit

RSEI crosswalks and shapefiles. RSEI crosswalks allow you to transpose data from the RSEI grid to Census blocks, and shapefiles provide grid geometry for mapping microdata. Both sets of files are available on the RSEI ftp site. Exit

U.S. census block-level data translated onto the RSEI Grid. More information on how the census files are created is contained in the RSEI methodology document.

Top of Page