the river was a seething, festering mass of decomposing sewage from house and factory, giving up great quantities of noisome gases; the surface of the river in many places having the appearance of a boiling caldron. Below Peoria, the river banks were strewn with dead fish due to the washings of the cattle barns at Peoria.” The runoff from these barns is extensive non-point source pollution, but direct pollution also occurs.