ESTIMATION OF WATER QUALITY INDEX BY WEIGHTED ARITHMETIC WATER QUALITY INDEX METHOD: A MODEL STUDY

The current study is about water quality parameters of Vijayawada, Krishna district of Andhra Pradesh. This study is intended to estimate water quality Index (WQI) of study area using Weighted Arithmetic water quality index method. In this study the quality of water of study area is determined using the various physico - chemical parameters such as p H , Total Dissolved Solids (TDS), Cl , SO4 , Na, K, Ca, Mg, and Total Hardness (TH). Physico - Chemical analysis of water samples was carried out at one hundred and ninety different stations of study area for pre monsoon and post monsoon seasons of 2014 which is collected and analyzed out of which nineteen samples were selected and water quality index estimated. Out of one hundred and ninety samples nineteen prime locations (wherein physiochemical property values were maximum) were selected and the quality index was analysed and explained in this paper. This study is to investigate the suitability of water for drinking purpose based on Water quality Index (WQI) estimated. Keywords : Water quality index (WQI) , sulphate ( SO4), Sodium(Na),Potassium( K),Calcium( Ca), Magnesium(Mg), and Total Hardness (TH). Physico - Chemical parameters.