An official website of the United States government.

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.

Risk-Screening Environmental Indicators (RSEI) Model

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

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  

NAICS codes are collected by TRI.

NAICS Table (Spreadsheet)(62 K, December 2018)

NAICS Table (Text Format)(123 K, December 2018)

NAICS Data

Variable Description
2017NAICSCode Six-digit NAICS code, based on 2017 NAICS code list.
LongName Text description of code.
Changed 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”).
4DigitNAICS 4-Digit NAICS.
NewIndustry '1' if industry was added during 1998 industry expansion.