This paper describes the atmospheric air quality assessment, based on modeling and calculation of concentration of pollutants emitted from point, linear, and surface sources of pollution from the Republic of Moldova. It was used the Tailor-Sutton model regarding statistical correlation of turbulence, perfected and adopted by normative document OND-86 for determining the concentration of pollutants at the ground level and establish of limited admissible emissions. The algorithm for calculating the dispersion of pollutants is done according to the “Ecolog- Integral” program. Input data (emissions, height, diameter, exit velocity of pollutants at the pipe level, weather conditions) both high and low sources were taken from technical projects of polluting enterprises, and according to official statistics data. Low sources at the district level were integrated into one surface source of pollution and counted as point source. In this paper were analyzed models using patterns of sedimentation coefficient values of pollutants 0,1-0,3 cm/s (standard value being 1,0 cm/s) that may form in unfavorable weather conditions (fog, for ex.) clumps of aerosols, thus leading to erroneous assessments between the theoretical and the experimental data of the concentrations of pollutants in atmospheric air at ground level. The patters present different maps for the contaminant concentration for NOx, SO2 from stationary and mobile sources for the most unfavorable conditions of pollution. According to the data provided by the EMEP European Monitoring Center, the total concentration in air atmospheric of oxidized nitrogen and oxidized sculpture on the territory of the Republic of Moldova is 0,428-0,784 and 0,523-1,015 μg/m3 accordingly, depending on the EMEP grid cell under survey. In the 90th years of the last century, the values of oxidized and reduced nitrogen and sulfur were higher then now. According to the Program "Ecolog-Integral" NOx dispersion calculations, emissions from local sources for protected areas the range vegetation has from 6,5 to 10 μg/m3, that is ten times smaller than the critical value, which indicates the significant NOx impact on the environmental components. Similar findings are reported and for SO2, SO4 in the atmospheric air basin.