Frequent Questions

What are the components of an Environmental Assessment (EA) or an Environmental Impact Statement (EIS)?

An EA is described in 40 CFR 1508.9 of the Council on Environmental Quality's NEPA regulations. Generally, an EA includes brief discussions of the following:

  • The need for the proposal;
  • Alternatives (when there is an unresolved conflict concerning alternative uses of available resources);
  • The environmental impacts of the proposed action and alternatives; and
  • A listing of agencies and persons consulted.

An EIS, described in 40 CFR Part 1502 of the NEPA regulations, includes discussions of the following:

  • The purpose of and need for the action;
  • Alternatives;
  • Affected environment;
  • Environmental consequences of the proposed action;
  • Lists of preparers;
  • List of agencies, organizations and persons to whom the statement is sent;
  • An index, and
  • An appendix (if any).
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