Jump to main content.

Clean Air Act

Links to Regulations

EPA projects that the Clean Air Act Amendments will prevent over 230,000 early deaths in 2020. Learn more about the Benefits and Costs of the Clean Air Act.

EPA is celebrating the 40th anniversary of the Clean Air Act. Learn more about how this landmark law has protected America's health and environment.

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.

Images of air emissions from cars, industry, and trains

Table of Contents

Related Documents

Full Text of the Clean Air Act as a Single Document

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

Benefits and Costs of the Clean Air Act from 1990 to 2020






Local Navigation

Jump to main content.