• Sonu Dwivedi

The water quality index (WQI) is an important parameter for determining the drinking water quality for the end users. The study for the same has been carried on the groundwater by collecting 16 groundwater samples from 4 blocks during pre-monsoon (April- May) and post-monsoon season (October-November) of the year 2018 of Dehradun District, India. In order to develop WQI the samples were subjected to a comprehensive physicochemical and biological analysis of 11 parameters such as pH, calcium, magnesium, chloride, nitrate, sulphate, total dissolved solids, fluorides, turbidity, total hardness and alkalinity. Geographical information system has been used to map the sampling area. The coordinates in terms of latitude and longitude of the sampling locations were recorded with the help of global positioning system. In this study 81% water samples were found good quality and 19% water samples falls under oderately poor category. The water quality index ranges from 01.07 to 94.58. The higher WQI values during premonsoon season have been inferred owing to higher calcium and magnesium concentrations assessed during the study. Therefore there is a need of more treatment before usage and also required to protect that area from contamination.

Ground Water, Water Quality Index, GIS, Physico Chemical Analysis

"Analysis of ground water quality using water quality index: A case study of Dehradun District, Uttarakhand, India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.576-587, May-2019, Available :http://www.jetir.org/papers/JETIR1905B84.pdf

"Analysis of ground water quality using water quality index: A case study of Dehradun District, Uttarakhand, India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp576-587, May-2019, Available at : http://www.jetir.org/papers/JETIR1905B84.pdf