Which agency is responsible for enforcing workplace safety and health regulations?

The Occupational Safety and Health Administration, known as OSHA, is the agency responsible for enforcing workplace safety and health regulations in the United States. Its primary mission is to ensure that employers provide a safe and healthful working environment for their employees. OSHA achieves this by setting and enforcing standards, providing training, outreach, education, and assistance to both employers and employees.

OSHA conducts inspections of workplaces to ensure compliance with safety standards and can impose penalties on employers who violate these regulations. The agency's influence is critical in the development of safe work practices for various industries, including the electrical trade, which is particularly hazardous and requires adherence to strict safety procedures.

The other agencies listed have different missions: the Environmental Protection Agency (EPA) focuses on protecting the environment; the Food and Drug Administration (FDA) oversees food safety and pharmaceuticals; and the National Institute for Occupational Safety and Health (NIOSH) conducts research and provides recommendations for the prevention of work-related injuries and illnesses but does not enforce regulations. Thus, OSHA is the correct answer, as it is specifically tasked with enforcing workplace safety and health standards.