Archived Guidance

This memorandum informed agencies’ implementation of the annual report to Congress on missed deadlines established by section 107 of NEPA, as amended by the Fiscal Responsibility Act of 2023.

This 1980 memorandum provided guidance for procedures on interagency consultation to avoid or mitigate adverse effects on rivers in the nationwide inventory of national wild and scenic rivers.

This 1980 guidance provided direction on applying section 404(r) of the Clean Water Act to Federal projects involving the discharge of dredged or fill materials into waters of the United States.

This 1981 memorandum provided advice on approaches to scoping under the National Environmental Policy Act and described some of CEQ's historical research on this topic.

This 1983 guidance provided direction on a number of different topics related to agency NEPA procedures and implementation of CEQ's prior NEPA regulations.

This 1999 memorandum encouraged Federal agencies to solicit participation of State, Tribal, and local governments as cooperating agencies in implementing the environmental impact statement process under NEPA.

CEQ Exchange of Letters with Secretary of Transportation: Purpose and Need

Memorandum for Federal NEPA Contacts: Emergency Actions and NEPA (superseded by January 21, 2026 guidance)

2016 Guidance on Emergencies and the National Environmental Policy Act (superseded by January 21, 2026 guidance)

This memorandum provided CEQ answers to frequently asked questions about the National Environmental Policy Act (NEPA) and the practical application of the NEPA regulations.