Abstract: Cement industry is flourishing in Iran due to the rapid population growth, the change in living style and the availability of raw material in the region. The increase of cement factories and their associated quarries in the region may deteriorate air quality and thus threaten the fragile ecosystems in the region. This study presents predictions of particulate matter emitted from a modern cement plant that is constructed in Shahroud, Iran. AERMOD is used to carry out the modeling part of this assessment. Our findings indicated that concentrations of Particulate Matter (PM) were found to be well below the permissible Iranian and EPA Standards for ambient air quality. Therefore, the proposed activity is not likely to have any significant adverse impact on the air environment in the vicinity of industry. However, The PM concentration is expected to be high according to the National standards approved in 2012.