This Institute started as "Occupational Health Research Institute' (OHRI) in the year 1966 and was re-christened as "National Institute of Occupational Health' (NIOH) in 1970 presently located in the Eastern part of Ahmedabad. Two Regional Occupational Health Centers (ROHCs) were started at Bangalore in 1977 and at Kolkata in 1980. The major objectives of the Institute and its centers are to identify and mitigate the occupational and environmental health problems in the country. The tools used for this purpose are research, education and information dissemination.