Which regulation focuses specifically on toxic substance control?

The correct choice is the Toxic Substances Control Act (TSCA), which was enacted to give the Environmental Protection Agency (EPA) the authority to regulate the introduction of new or already existing chemicals. TSCA aims to ensure that chemicals are assessed for their effects on health and the environment before they are commercially introduced. It applies to a wide range of substances, including industrial chemicals, pesticides, and chemical mixtures, and requires companies to provide information regarding the health and environmental effects of these substances.

TSCA plays a critical role in managing chemical safety, establishing requirements for the testing and reporting of toxic substances, and prohibiting the manufacture or processing of chemicals that present an unreasonable risk. This regulatory framework is essential for preventing exposure to hazardous chemicals that could have long-term consequences on public health and the ecosystem.

Other regulations mentioned, such as the Resource Conservation and Recovery Act (RCRA), the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), and the Clean Water Act (CWA), address different aspects of environmental protection and hazardous waste management, but none are focused specifically on the regulation of toxic substances in the same way as TSCA.