Which organization defines the Recommended Exposure Limit (REL)?

The Recommended Exposure Limit (REL) is defined by the National Institute for Occupational Safety and Health (NIOSH). NIOSH is responsible for conducting research and making recommendations for the prevention of work-related illnesses and injuries. One of its key functions is to establish RELs, which are guidelines intended to protect workers from potential health risks associated with exposure to hazardous substances in the workplace.

These limits are based on scientific research and are designed to help prevent occupational diseases. NIOSH RELs are not legally enforceable but serve as vital guidance for employers and employees in managing workplace safety and health.

In contrast, OSHA (Occupational Safety and Health Administration) sets legal standards known as Permissible Exposure Limits (PELs), which are enforceable regulations. The Environmental Protection Agency (EPA) focuses on environmental protection and may set exposure limits relevant to public health and the environment, while the Centers for Disease Control and Prevention (CDC) is involved in health promotion, disease prevention, and preparedness activities but does not set exposure limits in the workplace.