Clean Air Act
The Clean Air Act is the law that defines EPA's responsibilities for protecting and improving the nation's air quality and the stratospheric ozone layer. The last major change in the law, the Clean Air Act Amendments of 1990, was enacted by Congress in 1990. Legislation passed since then has made several minor changes.
The Clean Air Act, like other laws enacted by Congress, was incorporated into the United States Code as Title 42, Chapter 85. The House of Representatives maintains a current version of the U.S. Code, which includes Clean Air Act changes enacted since 1990.
This site provides links to sections of the U.S. Code containing the amended text of the Clean Air Act. Section numbers in the U.S. Code are different than the Clean Air Act's section numbers. The table of contents below gives corresponding section numbers in the Clean Air Act (CAA) and the U.S. Code (USC). Another difference is that titles in the Clean Air Act correspond to subchapters in the U.S. Code.
Table of Contents
- Title I - Air Pollution
Prevention and Control
- Part A - Air Quality and Emission Limitations (CAA § 101-131; USC § 7401-7431 )
- Part B - Ozone Protection (replaced by Title VI)
- Part C - Prevention of Significant Deterioration of Air Quality (CAA § 160-169b; USC § 7470-7492)
- Part D - Plan Requirements for Nonattainment Areas (CAA § 171-193; USC § 7501-7515)
- Title II - Emission
Standards for Moving Sources
- Part A - Motor Vehicle Emission and Fuel Standards (CAA § 201-219; USC § 7521-7554)
- Part B - Aircraft Emission Standards (CAA § 231-234; USC § 7571-7574)
- Part C - Clean Fuel Vehicles (CAA § 241-250; USC § 7581-7590)
- Title III - General (CAA § 301-328; USC § 7601-7627)
- Title IV - Acid Deposition Control (CAA § 401-416; USC § 7651-7651o)
- Title V - Permits (CAA § 501-507; USC § 7661-7661f )
- Title VI - Stratospheric Ozone Protection (CAA § 601-618; USC § 7671-7671q )
Links to Regulations
Full Text of the Clean Air Act as a Single Document
- Clean Air Act as of February 2004 (PDF) (465pp, 1.1 MB, about PDF) - This version of the Clean Air Act, provided by the U.S. Senate Committee on Environment and Public Works, includes amendments through the 108th Congress.
1990 Amendments to the Clean Air Act
This is the act passed by Congress in 1990 to amend the Clean Air Act. It was the last major amendment to the Act, although there have been minor changes since then.
Plain-language description of the Clean Air Act
History of the Clean Air Act