Reddy, A. G. S., Sastry, K. S. and Raghavendra, G. (2021) “Evaluation of Different WQI Methods for Drinking Water Assessment with a Case Study of Groundwater from Vizianagaram District, AP, India”, Journal of Geography, Environment and Earth Science International, 25(10), pp. 28-46. doi: 10.9734/jgeesi/2021/v25i1030313.