Bulletin of Pure and Applied Sciences. Vol.40F, Geology (Geological Science), No.2, July-December 2021: P.219-226 Print version ISSN 0970 4639 Online version ISSN 2320 3234 DOI: 10.5958/2320-3234.2021.00019.6 Original Article Available online at www.bpasjournals.com Mathematical Computation of Weighted Arithmetic Water Quality Index of Jui Dam of Jalna District, Maharashtra Deshpande S.M . 1 , *Bhagwat U.S. 2 , Aher K.R. 3 Author’s Affiliations: 1 Post Graduate Department of Geology, Institute of Science, Caves road, Aurangabad, Maharashtra 431001, India 2 Department of Geology, Rajaram College, Vidya Nagar, Kolhapur, Maharashtra 416004, India 3 Groundwater Surveys and Development Agency, Central Administrative building, Fazalpura, Aurangabad, Maharashtra 431001, India *Corresponding Author: Bhagwat U.S., Department of Geology, Rajaram College, Vidya Nagar, Kolhapur, Maharashtra 416004, Ind ia E-mail: kailashgis@gmail.com (Received on 20.072021, Accepted on 06.10.2021) How to cite this article: Deshpande S.M., Bhagwat U.S. & Aher K.R. (2021). Mathematical Computation of Weighted Arithmetic Water Quality Index of Jui Dam of Jalna District, Maharashtra. Bulletin of Pure and Applied Sciences- Geology, 40F(2), 219-226. INTRODUCTION Due to rapid growth of population, urbanization, industrialization, and agriculture activities, all water resources are under stress. It is important to assess the health of water bodies to develop strategies to improve w ater resource and watershed management. Most ecosystems around the planet are experiencing problems associated with water scarcity and quality. In other words, water resources are at risk. Natural processes and anthropogenic activities influence water quality, causing degradation in surface and groundwater and affecting their potential use for human and animal consumption, agriculture, recreation, industry, and others (Simeonov et al, 2003; Sánchez et al, 2007; UN-Water, 2010; Aher and Deshpande, 2011; Deshpande and Aher, 2012; Zhang et al, 2012; Varade et al, 2014; Orozco et al, 2017; Aher, et al., 2017; Aher and Dhumal, 2017; Aher and Gaikwad, 2017; Wagh et al, 2018; Dhumal and Aher, 2019; Dangi, et al, 2018; Dhumal, 2021). The assessment of drinking water quality using water quality index (WQI) is one of the best tools which was developed in the 1970s by the Oregon Department of Environmental Quality to summarize and assessing the status of water quality (Brown et al., 1972; Tiwari and Mishra, 1985; Singh 1992; Mishra and Patel 2001; Naik and Purohit, 2001; ABSTRACT A pplication of water quality index is a useful method in assessing the suitability of water for various beneficial uses. The objective of this study was to know the water quality index of the surface water of Jui dam. For calculating the water quality index parameters namely, pH, total dissolved solids, total hardness, total alkalinity, calcium, magnesium, sodium, potassium, chloride, sulphate, nitrate and fluorides were considered. Weighted arithmetic water quality index method was used to find surface water quality index. KEYWORDS: Water quality parameters, water quality Index, Jui dam, Jalna, Maharashtra .