Categorical exclusions are categories of actions that DOE has determined, by regulation, normally do not have a significant effect on the human environment and for which, therefore, neither an environmental assessment nor an environmental impact statement normally is required. DOE's categorical exclusions are listed in Appendices A and B to Subpart D of its NEPA regulations, 10 CFR Part 1021.

DOE has completed two rulemakings that updated its categorical exclusions since online posting began in late 2009. In 2011, DOE made changes to several categorical exclusions and added 20 new categorical exclusions. More information, including a track changes file, is available on the 2011 DOE NEPA rulemaking web page. In 2020, DOE made more focused changes regarding natural gas export authorizations; these changes became effective on January 4, 2021. See the page listing categorical exclusion determinations for B5.7.

Not all categorical exclusion determinations contain the full text of the relevant categorical exclusions. To find the full text, refer to the DOE NEPA regulations that were in effect at the time the categorical exclusion determination was signed.

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