The  Bhopal disaster  or  Bhopal Gas Tragedy  was an  industrial catastrophe  that occurred in 1984 at the  Union Carbide India Limited  (UCIL)  pesticide  plant in  Bhopal ,  Madhya Pradesh , India. At the time, UCIL was the Indian subsidiary of the  U.S.  company Union Carbide  Corporation (UCC), itself now a subsidiary