The increased number of modern livestock farming increase pollutant gas and particulate matter emissions and expanding of residential area against rural area cause to be more sensitive to these gas and particulate matter emissions from animal operations. In this study, pollutant gas dispersions from three dairy cattle barns operated in Bursa region were modelled using hourly outdoor environmental and topographic conditions. To develop dispersion models and describe dispersion problem as a quantity, pollutant gas emissions from dairy cattle operations and CALPUFF VIEW 5.8 modelling software were used. It was determined that estimated pollutant gas concentrations in five receptor points (A-E) in surrounding environment were significant levels. Furthermore pollutant gas emissions from dairy cattle barns can reach a remarkable values in an area with 2000 in diameter in surrounding environment.