India had a major river that was a slow flowing, bubbling septic sewer, from way too many people, in too many villages, towns and cities were doing their business near the river. Hopefully that’s changed in the last 10 years. This river is mostly litter.
I posted one this past May about a river in India...the video report is from July 2017:
The Yamuna: India’s Most Polluted River [10 minute video]
http://www.freerepublic.com/focus/f-chat/3654092/posts
I know what river you are talking about. They bury their dead in that river!!