Textile wastewater is a complex solution composed of nitrates, phosphates, dyes, acids, and toxic metals. Treatment of textile effluent by biological method is cost effective and an ecofriendly approach. In this study it has been focused on treating textile (dyeing) waste water sample with microalgae, and producing biomass by employing of Scenedesmusquadricauda and Phormidium bohneri collected from fresh and saline water from Karachi.In the results S. quadricaudas how greatreduction of contaminant sat 50% dilution with distil water in T2 treatment, whereas P. bohneri showed better results in contaminants reduction in T3 and T4 respectively. The treatments significantly reduced Biological oxygen demand (BOD) and Chemical oxygen demand (COD) levels in all treatments of textile waste water sample. The finding sindi cated that textile effluent maybe decontaminated utilizing microalgae, P. bohneri and S. quadricauda, and that effluent sample could be utilized as a base for growth of microalgae. The results indicated potential for future effectiveness and the generation of biomass with a variety of uses.