The ritual of the funeral Hindus believe that The Ganges River is to take the soul of the deceased to the place of worship.
The Ganges is a holy river of the Hindus. Sewage floating on the water is not treated as dirt or germs anyhow.
When the Ganges relatives of the deceased to buy firewood to be cremated. After placing the bodies on the wood prepared to top with firewood and covered with cow dung sheets of dried again first class. (Hindu cow dung is considered auspicious. Which God of the highest and most Hindu gods present end it respect). Sewage floating on the water is not treated as dirt or germs anyhow. Hindus still water baptism as usual. For bodies floating in the river Ganges, it will decompose naturally.