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:

What's new in the latest version of RSEI: version 2.3.5

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 2.3.5, released in early 2017:

  • Includes TRI Reporting Years 1988-2015.
  • Toxicity weights have been updated with the most recent toxicity data.
  • Default, industry-level and facility-specific stack heights have been updated with 2011 data from the NEI.
  • Default and industry-level chromium speciation rates (the portion of total chromium released assumed to be hexavalent) have been updated with 2011 data from the NEI.
  • The stream network hydrography has been updated from Version 1 to Version 2 of NHDPlus.
  • Off-site transfers to incineration have been adjusted for potential double counting, beginning with reporting year 1998, when facilities in the commercial hazardous waste treatment sector were first required to report to TRI.


RSEI results are provided in EasyRSEI, an easy-to-use application that contains preformatted RSEI results from Version 2.3.5, and also contains custom query functionality for selecting and exporting RSEI results for specific facilities, locations, chemicals and years. EasyRSEI runs with Microsoft Access, but you do not need to know how to use Microsoft Access or have it installed in order to use EasyRSEI.

 Go to the Get EasyRSEI page

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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.

Currently users can download two different datasets:

RSEI Version 2.3.4 - All Years Dataset (1988-2014, by year)

RSEI Version 2.3.5 - Most Current Three Years Dataset (2013-2015, by year)

  • The last three years of Microdata are available on the RSEI ftp site.

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.

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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.

Toxic TrendsExit An interactive map showing RSEI facility-level results from 1988 through the current RSEI release. Maps can be shared through social media and embedded in other websites.

TRI.NET. A downloadable application that allows you to select, sort and filter TRI data. You can combine TRI with other data sources, display your results on a map, and export your results into other applications for further analysis. RSEI Hazard results (toxicity*pounds) are included in TRI.Net.

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.

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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 V2.3.5 contains TRI data from 1988 through 2015, as frozen in the fall of 2016 for the TRI National Analysis dataset.

RSEI Queries Version 2.3.5(1 pg, 573 MB)

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. RSEI CSV files are available on the RSEI ftp site and the RSEI site in the Amazon Public Data Sets programExit.

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.

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.

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