The current technology used to control worker exposure to chemical and physical health hazards in the foundry industry was investigated through a survey of functioning control methods in 24 ferrous and nonferrous foundries and through a review of the literature. The major categories of foundry processes that were reviewed included cleaning and finishing of ferrous castings, green sand systems, melting and casting, molding and coremaking using chemically bonded sand, material handling systems, and maintenance procedures. The highest priority was placed on evaluation of technology for controlling air contaminants because exposures posed a severe potential health hazard to workers in most foundry process areas. Less research emphasis was placed on controls for heat stress, noise, ionizing and nonionizing radiation, and vibration. Each process was evaluated with regard to advantages and limitations of each control measure, the principles behind each category of control, deleterious effects of the individual hazards, and appropriate case history studies or literature references. The author presents extensive conclusions concerning the existence and effectiveness of the control measures and recommendations for further research and development.