Which organization in the United States is responsible for the enforcement of safety work rules?

The Occupational Safety and Health Administration (OSHA) is the federal agency responsible for enforcing safety work rules in the United States. Established under the Occupational Safety and Health Act of 1970, OSHA's primary mission is to ensure safe and healthy working conditions for employees by setting and enforcing standards and by providing training, outreach, education, and assistance.

OSHA conducts inspections, provides compliance assistance, and issues citations for violations of safety regulations. Its role is critical in reducing workplace hazards and preventing injuries, illnesses, and fatalities in the workplace. The agency covers a wide range of industry sectors and has specific standards for various types of work environments, which makes it central to the enforcement of safety work rules nationwide.

Other organizations mentioned, while important in their respective areas, do not have the same enforcement authority regarding workplace safety. The National Safety Council focuses on preventing injuries and saving lives but does not have regulatory enforcement capabilities. The Environmental Protection Agency deals primarily with environmental regulations and protection, while the Federal Safety Administration does not exist as an entity focused on workplace safety. Thus, OSHA stands out as the correct answer in this context.