The health hazards of occupational exposure to dust were reviewed with regard to the physiological effects of dust exposure, determination of the concentration and physical nature of industrial dusts, the principal dust producing operations, and means to reduce hazardous dust exposures. Dust inhalation was categorized as producing lung fibrosis or pneumoconiosis, or resulting in generalized toxic effects, metal fume fever, allergic reactions, or irritation of the respiratory tract. The author recommends the Zeiss Konimeter for determinations of dust levels in industrial settings. Dust producing operations discussed, in order ranging from greatest to least dust production were: sandblasting, filtering operations, insulating operations, guniting operations, welding and cutting, grinding operations, the handling of powdered or pulverized materials such as are used in the treatment of petroleum products and boiler water and in the manufacture of greases and pesticides, the cleaning of the tubes and drums of boilers and process equipment, foundry operations, masonry, woodworking, and rock excavation. Measures for dust control and the prevention of dust related health problems discussed included effective facility design for dust control when building new or remodeling, proper building ventilation, storing dusty materials in dust tight bins and enclosing mechanized material handling equipment, isolating dusty processes and wherever possible using wet methods of operation, effective equipment design for dust control, sufficient exhaust systems with provision of dust arresters, the use of respirators, and the establishment of proper maintenance and housekeeping procedures. The author recommends that workers employed for dusty operations be physically fit and nose breathers, and that such workers be periodically examined for pulmonary function changes.