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 This website is no longer updated and links to external websites and some internal pages may not work.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

RSEI Data Dictionary: North American Industry Classification System (NAICS) Data

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  

NAICS codes are collected by TRI.

NAICS Table (Spreadsheet)(63 K, December 2020)

NAICS Table (Text Format)(141 K, December 2020)


Variable Description
2017NAICSCode Six-digit NAICS code, based on 2017 NAICS code list.
LongName Text description of code.
Changed2017 Description of change if code is new or revised with the 2017 NAICS.
TRIIndustrySector Industry sector with text description defined by 3- or 4-digit NAICS, as used by the TRI program for sector analyses (see TRI Supplemental Documentation under “Industry”).
IndustrySubsector 4-Digit NAICS code and text description.
4DigitNAICS 4-Digit NAICS.
NewIndustry '1' if industry was added during 1998 industry expansion.