India is a country with many, many rivers. The water quality is not guaranteed as safe to the people.

I cannot believe a scientific investigation had to be pursued to end illegal mining (click here) that contaminates the rivers.

THIS IS ILLEGAL RIVER BED MINING IN INDIA THAT ARE MAKING PEOPLE SICK OR WORSE.

Water quality assessment using overall index of pollution in riverbed-mining area of Ganga-River Haridwar, India
Nitin Kamboj &Vishal Kamboj
Pages 65-74

Published online: 25 Jul 2019

The present investigation (click here) was conducted during the period 2017–2018 on Ganga riverbed mining-affected areas of district Haridwar for the assessment of seasonal dynamics of surface quality using the Overall Index of Pollution (OIP). OIP analysis was helpful in determining surface water quality. For the analysis, five sampling sites were selected with triplicate analysis of collected water sample were done to represent the effective impact of riverbed mining on selected physicochemical parameters. OIP value of surface water quality were found in winter (excellent: 1.13) > summer (acceptable: 3.37) > monsoon (slightly polluted: 7.94). As compared to site where mining was not carried out, the spatial analysis showed that the selected riverbed mining sites had high OIP score. Therefore, it was concluded that the riverbed mining practice had a negative influence on the surface water quality of the Ganga River in the selected region, and hence should be given special attention to maintaining ecological sustainability.....