couesbitten
WKR
The shallower the water, the clearer/cleaner it looks, so as a 16 year old, moving sprinkler lines in an alfalfa field, I drank GALLONS of Yakima river irrigation water that was draining out of the pipes, never once got sick. 30+ years later, I'm hit and miss on filtering water while in the back country, but I've no fear drinking the water. I agree with what others above have said about hygiene, I think it's probably a bigger component than anything floating around in my water.