This outline lists the major federal regulations for the programs listed below. The outline provides citations to where the regulations appear in the current Code of Federal Regulations (CFR) as of July 1, 2012. 

The Government Printing Office provides additional tools you may find useful in your research: The Electronic Code of Federal Regulations (e-CFR), which  is a currently updated version of the Code of Federal Regulations and the Parallel Table of Authorities and Rules.

Air
Energy
Governance
Natural Resources
Toxic Substances
Waste
Water