From the Executive Summary of a Report to Congress on the Costs and Benefits of Federal Regulations and Unfunded Mandates on State, Local, and Tribal Entities
OMB reviewed 107 major Federal rulemakings finalized over the previous ten years (October 1, 1992 to September 30, 2002). The estimated total annual quantified benefits of these rules range from $146 billion to $230 billion, while the estimated total annual quantified costs range from $36 billion to $42 billion. The majority of the quantified benefits are attributable to a handful of clean-air rules issued by EPA pursuant to the 1990 amendments to the Clean Air Act.
See the entire 200-plus-page report.