Detecting of Water Quality Using National Sanitation Foundation (WQI) Index (Case Study: Ilam ChamGardallan's Dam)

The water quality monitoring of rivers is the most important method for increasing quality of the dam resourvior. To study the quality of chamgardallan's dam as the main source of drinking water of ilam city and for existing of pollution resources, such as wastewater of village, livestock manure in the watershed' dam is essential.

In this cross sectional study, standard parameters including dissolved oxygen. Temperature, biochemical oxygen demand, most propable number of Coliforms, fecal coliform, Turbidity, total dissolved solids, pH and others were measured at seven different stations during  6 mount.. Every mounth were done once sampling with three times review. Sampling points were selected somewhat were shown  the real quality of water in rivers and dam.water quality index was calculated using water quality index calculator given by National Sanitation Foundation(NSF) information system.  

on basis of  WQI index , water quality in all of stations were at the third group about 50-70.the highest value of WQI of the samples was 63.47 in khoroji station and the lowest value of WQI  was 51.4 in Talaghi station.

Water resources are at risk of natural resources and human agents. NSFWQI  in dam stations was about 53-64. this subject showed locating  water in resourvior was the cause of water quality  improvement.Results the water quality of rivers and the negative effects of differences uses in watershed provided easier deciding for managers about zoning of watershed for establishing of harmonic uses and planning for conservating on control and decrease of pollution resources.