  Some of the important critical parameters for assessing the water quality
like pH (Hydrogen ion concentration), DO (Dissolved Oxygen), BOD (Biological
Oxygen Demand), etc., were monitored at different locations in some major
Indian rivers. The results obtained from the study reveals that the critical
parameters had increasing values in some monitoring locations, decreasing
values, and no variation in values at some other places. It is recommended to
have a pH value above 7, higher values of DO, lower values of BOD & FCC (Faecal
Coliform Content) for improved water quality. Overall, the water quality
improved in most Indian rivers. There was no discharge of industrial wastes,
hotels/restaurants wastes, immersing of idols during religious festivals, etc.,
to the rivers during the COVID-19 lockdown. Therefore, enforcement of strict
regulations by the Government of India for disposal of wastes produced from
industrial & domestic activities can significantly reduce the water pollution
levels in the Indian rivers.
