I was there at Varanasi, India at the Ganges River in early January of 1986

 We were traveling with a Tibetan Lama friend and his Tibetan Translator from Darjeeling, India at the time on the train. People were bathing and brushing their teeth in the waters then too. There were also pink fresh water dolphins at that time too. I'm not sure how the fresh water dolphins are doing now though. We didn't go in the water because that might be dangerous to foreigners simply because we likely didn't have the right local microbes in our systems to survive this but we did rent a boat and got close to the pink fresh water dolphins which swam around us then.

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Ganges river dolphins once lived in the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems of Nepal, India, and Bangladesh. But the species is extinct from most of its early distribution ranges. The Ganges river dolphin can only live in freshwater and is essentially blind.

Ganges River Dolphin | Freshwater Dolphin | Species | WWF