Suitability of water quality index methods for assessing groundwater quality in the Ganges River basin area

Abstract This study considered three different water quality indices (WQIs) for groundwater data collected from the middle-west part of Bangladesh, and quantitative results were justified with globally accepted guidelines. It compared between Canadian WQI Weighted Average WQI, Mierels drinking irrigation purposes, respectively. The revealed that method categorized as ‘fair’ while model showed ‘unsuitable’ usage. Besides, Meireles is classified ‘good’ to ‘excellent’, categorization using was suitability irrigation. When comparing technique drinking, latter one gave abnormal results; pair difference statistics significant negative correlation (r=−0.91) them. Similarly, analysis two methods (Canadian Mierels) use exhibited there no statistical variance techniques at a matrix (r=+0.71). concluded would deliver better results.