Which act is responsible for regulating air quality standards in the United States?

The Clean Air Act is the primary law that governs air quality standards in the United States. Enacted initially in 1963 and amended multiple times since then, this act empowers the Environmental Protection Agency (EPA) to set and enforce national air quality standards aimed at protecting public health and the environment. It covers various aspects of air pollution control, including emissions from industry, vehicles, and other sources, and establishes a framework for states to develop and implement their own air quality plans in compliance with federal standards.

The significance of the Clean Air Act lies in its role as a comprehensive federal statute designed to regulate air emissions and ensure that air quality meets acceptable health and environmental benchmarks. Other acts mentioned do not exist as specified or do not serve the same purpose in regulating air quality standards as the Clean Air Act does.