Ganges Basin (112,490 km²), West Bengal (71,485 km²), Haryana (34,341 km²), Himachal Pradesh (4,317 km²) , Delhi, Arunachal pradesh(1,484 km²), the whole of Bangladesh, Nepal and Bhutan. Several tributaries rise inside Tibet before flowing south through Nepal. The basin has a population of more than 500 million, making it the most populated river basin in the world. The basin comprises semi-arid valleys in the rain shadow north of the Himalaya, densely forested mountains south of the highest ranges, the scrubby Shiwalik foothills and the fertile Gangetic Plains. Central highlands south of the Gangetic Plain have plateaus, hills and mountains intersected by valleys
Nitrate in the Mississippi River Basin way into the surface waters. Nitrate concentration can be dangerous passed a certain level. The water in the Des Moines River is near the maximum legal level of nitrate concentrations for drinking water, and the EPA has declared much of the fish in the river unsafe to eat. Nitrate concentration estimations were made from 1980 to 2010 at a site of the Mississippi River above the Old River Outflow Channel, which is also known as the Old River Control Structure. Its purpose is to flow the water from the Mississippi River into the Atchafalaya Basin in order to prevent the