Overview
The Clean Air Act (CAA) is the primary federal air quality law in the United States. The law sets standards for outdoor air quality and emissions of hazardous pollutants. With a rich history, the CAA has undergone significant transformations, including major amendments. Today, the CAA remains a cornerstone of US environmental policy, with the EPA working closely with state, local, and tribal governments to implement its regulations and protect public health. The law's impact is evident in the reduction of air pollution levels across the country. As the US continues to grapple with the challenges of climate change and environmental sustainability, the Clean Air Act remains a vital tool for promoting clean air and public health, with ongoing efforts to strengthen its provisions and address emerging issues.