Wolters Kluwer - Medknow Wolters Kluwer India Pvt. Ltd. International Journal of Environmental Health Engineering (IJEHE) AWAITED 4 November 2015 11 01 Assessment of national sanitation foundation water quality index and other quality characterization of Mamloo dam and supporting streams 1 7 26912 10.4103/2277-9183.170711 EN Saeed Parastar Department of Environmental Health Engineering, Student Research Center, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran Ali Jalilzadeh Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Yusef Poureshg Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran Majid Hashemi Department of Environmental Health Engineering, Student Research Center, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran Abbas Rezaee Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Hooshyar Hossini Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Journal Article 2023 01 27 <strong>Aims:</strong> This study was aimed to determine national sanitation foundation water quality index (NSFWQI), sodium adsorption ratio (SAR) and some other parameters such as electricity conductivity (EC) and sodium percent (%Na) to investigate the quality of the Jajrood and the Damavand rivers, the mix of them and Mamloo dam. <strong>Materials and Methods:</strong> The tested parameters were pH, dissolved oxygen, biochemical oxygen demand, total solids, nitrate, phosphate, turbidity, temperature, fecal coliform, EC, Na, potassium (K), calcium and magnesium. The used indices were NSFWQI, SAR, %Na and magnesium hazard. <strong>Results:</strong> average WQI for the Jajrood river (S₁), Damavand river (S₂), mix of S₁ and S₂(S₃) and the Mamloo dam (S₄) were 71.7 (good), 64.5 (medium), 70.6 (medium) and 77.3 (good), respectively. According to USA Laboratory Diagram and Wilcox diagram, all the sampling points were in C₃-S₁(very good to good classes), C₂-S₁(good to permissible classes) categories. <strong>Conclusion:</strong> According to the results, the water of sampling points is unsuitable for direct human consumption. However, for the S₁, S₂ and S₃ as drinking water, advanced treatment may be needed. For S₄ as a drinking water source, conventional treatment may be necessary. All the sampling points are suitable for irrigation purposes under normal conditions. https://ijehe.mui.ac.ir/article_26912_3f9aa18413f2cd71eed355ca12da7315.pdf