Certified Hazardous Materials Manager Practice Exam 2026 – Comprehensive Test Prep

The Clean Air Act (CAA) is the federal statute that regulates both stationary and mobile pollutant sources. This comprehensive law is designed to control air pollution on a national level, establishing air quality standards to protect public health and the environment.

Stationary sources refer to fixed-site emissions, such as factories, power plants, and industrial facilities, while mobile sources include vehicles, airplanes, and other transport mechanisms that contribute to air pollution. The CAA authorizes the Environmental Protection Agency (EPA) to set emissions standards for these sources, ensuring that both types of pollutants are managed to minimize their impact on air quality.

In contrast, the other statutes do not encompass both stationary and mobile sources in their regulatory framework. For example, the Toxic Substances Control Act (TSCA) focuses primarily on the regulation of chemicals and does not address air pollution broadly. The Clean Water Act (CWA) pertains specifically to the regulation of discharges into navigable waters, while the Safe Drinking Water Act (SDWA) focuses on the quality of drinking water supplies. Therefore, the CAA is the appropriate answer, as it governs a wider range of air pollution sources.