Surveillance of silicosis has been funded since 1984 by the National Institute for Occupational Safety and Health (NIOSH). Surveillance of silicosis has also led to hazard surveillance projects in which a particular industry that generates silica dust is targeted for study. The NJDOH has conducted studies of silica exposure in brass and bronze foundries, dental laboratories, and the highway construction/repair industry. A study of silica exposure in monument workers is currently underway