The Petroleum and Explosives Safety Organization (PESO), formerly known as Department of Explosives, since its inception on 05/09/1898, has been serving the nation as a nodal agency for regulating safety of hazardous substances such as explosives, compressed gases and petroleum. PESO’s major work is to administer the responsibilities delegated under the Explosives Act 1884 and Petroleum Act 1934 and the Rules made there under with the motto "Safety First".

PESO has its Headquarters at Nagpur in Maharashtra and serves through nine Circle Offices viz Agra, Bhopal, Chennai, Faridabad, Guwahati, Hyderabad, Kolkata, Mumbai, Vadodara and their subordinate Sub-Circle offices across the country.