Which organization is responsible for ensuring safe working conditions in the U.S.?

The Occupational Safety and Health Administration (OSHA) is the organization responsible for ensuring safe working conditions in the United States. Established under the Occupational Safety and Health Act of 1970, OSHA's primary mission is to protect workers by setting and enforcing standards, providing training, and conducting inspections to ensure compliance with health and safety regulations.

OSHA plays a critical role in reducing workplace hazards and promoting safe work practices across various industries, which is essential for preventing workplace injuries, illnesses, and fatalities. It also engages with employers and employees to foster a culture of safety in the workplace through educational resources and compliance assistance.

Other organizations mentioned may have important roles in their respective areas. For instance, the Environmental Protection Agency focuses on environmental protection and regulation, while the American National Standards Institute develops voluntary consensus standards for various sectors, and the Institute of Occupational Safety addresses occupational safety but does not have regulatory authority like OSHA.