Assessment quality of right branch of Sarugh River located in Takab byNational Sanitation Foundation Water qualityindex (NSFWQI) as well as zoning it using Geographical Information system (GIS)

Rivers are one of the most important water resources that play an important role to supply water requirements of different activities. and we able to make decisions about their application with their quality monitoring. This study was done to evaluate the right branch of Sarugh River quality using National Sanitation Foundation developed the Water Quality Index (NSFWQI) and zoning obtained by geographic information system (GIS).
In this cross sectional study, standard field parameters including dissolved oxygen, temperature, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand, Most Probable Number of Coliforms, Fecal Coliform, Turbidity, Total Dissolved Solids, Total Solids, pH, Conductivity and others were measured at five different stations of right branch of Sarugh Tekab during the spring and summer in 2016. Sampling points were selected based on their importance. Water quality index was calculated using water quality index calculator based on National Sanitation Foundation (NSF) information system.
The highest value of NSFWQI of the samples was 85 in A station in April while the lowest value was 55 in E station in May. Based on NSFWQI categories, water quality in A station was found in good category, and in other stations, were found within Moderate. Decreasing value of Water Quality Index (WQI) may be attributed to the high values of BOD and Fecal Coliform number in the stations of water.
Study results showed good water quality for A station that is suitable for various applications. In addition based on the results, it is expected to be provided valuable information in connection with the use of water bodies by the local people of the study region.