en Environmental Health, Sciences, and Engineering Environmental Health, Sciences, and Engineering پژوهشي Original Article <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:times new roman;"><strong>Background:</strong> Gypsum industry is one of industries which is known as an environment pollutant. In this study distribution and prediction of emitted PM₁₀ from Gypsum factory is studied by modeling. The main goal of this study is to create a regression equation to demonstrate the Zarch factory PM₁₀ dispersion by the AERMOD model.<br> <strong>Methods: </strong>In this study distribution and concentration of emitted particulate matter (PM₁₀) is estimated by AERMOD model. The regression equation of emission is resulted by AERMOD estimation and excel software, finally the results of AERMOD model and regression equation was compared to each other.<br> <strong>Results:</strong> In this study the regression equation is c = 14.6 x ^(-1.045)and by this regression equation the particulate matter&rsquo;s concentration could be estimated around the factory. Comparison of regression equation and AERMOD model represented that 69% of total results are similar in models.<br> <strong>Conclusion:</strong> The results of this study represented that by AERMOD outputs, a regression equation could be created which is able to estimate particulate matter&rsquo;s concentration around the emission sources according to sources properties, meteorological parameters, site topography and etc.</span></span></div> Pollutant sources, Distribution, Estimation, Power function 164 168 http://jhehp.zums.ac.ir/browse.php?a_code=A-10-220-1&slc_lang=en&sid=1 Marzieh Makaremi makaremi20@yahoo.com 10031947532846009647 10031947532846009647 No Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran. Nabiollah Mansouri nmansourin@gmail.com 10031947532846009648 10031947532846009648 Yes Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran. Alireza Vafaeinajad a_vafaei@sbu.ac.ir 10031947532846009649 10031947532846009649 No Department of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran. Mohammad Hasan Behzadi behzadi.stat@gmail.com 10031947532846009650 10031947532846009650 No Department of Foundation Science, Science and Research Branch, Islamic Azad University, Tehran, Iran. Seyed Alireza Mirzahossieni 10031947532846009651 10031947532846009651 No Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.