Increase awareness on part of human society is needed if constantly changing environment is to be managed scientifically. Climatic pollution which is the direct results of various industrial activities has become one of the major environmental issues. This has made filtration operation as inseparable part of human activity. The man-made induced pollutions can be controlled using varied and rather complex filtration technologies and fibrous filter media. Nonwoven textiles which are the newest addition to textile products have been successfully used as filter media. Nonwoven fabrics due to their voluminous and highly porous structures are the most widely used filter media. In addition to filtration, nonwoven textiles can be used as a thermal and acoustic insulation as well as composite fabrication and many other industries. Structure of filter media is directly influenced by the filtration process. In the case of nonwoven filter media, needled nonwovens are the most widely used nonewoven fabrics. Scientific researches in this field are mostly undertaken by the needle manufacturers and usually are not published. In this study, factors affecting the performance of needled nonwoven filter media were studied. The effect of factors such as needle type, punching density and penetration depth was investigated using twelve nonwoven needled samples. Samples were made using two types of felting needles at two needle penetration depths and three needle densities. The effect of these factors on physical and mechanical filtration performance of the prepared samples was evaluated. The number of fibers displaced by the needle barbs is of vital importance as far as filter media performance is concerned. Thus, the number of fibers displaced was theoretically determined. The filtration performance of the samples determined in terms of pressure drop and efficiency. It was found that increase in needling density and needle penetration depth result in reduction of media permeability while increasing tensile strength when the finer needles are used. It was also found that increase in pressure drop occurs due to the use of coarser needles and increase needle penetration depth. Increasing efficiency at 8 mm penetration depth increases with increasing needle fineness and needle density, and specimen sampled at 11 mm penetration depth with coarser needles and needle density of 336 needles / cm 2 has the highest efficiency due to the increased fiber involvement and displacement. ANOVA analysis was used to determine the statistical significance of the results and the interaction of the independent factors on dependent factors such as unit mass of the surface, thickness, number of displaced fibers, tensile strength and air fabric air permeability. Significant difference (LSD) was adjusted for single, double, and triple for all influential and dependent factors using SAS software.