"Air pollution", for purposes of air pollution control laws and environmental management laws, means the presence in or the threatened discharge into the atmosphere of one (1) or more contaminants in sufficient quantities and of the characteristics and duration that:
IC 13-11-2-5
Pre-1996 Recodification Citations: 13-1-1-2(c), (h) part; 13-7-1-3 part; 13-7-1-4.