About four in ten North American freshwater fish are endangered, according to a pan-North American study, the main cause being human pollution. The number of fish species and subspecies to become endangered has risen from 40 to 61, since 1989.
https://en.m.wikipedia.org/wiki/Freshwater_fish
Another reason not to drink the water. Be sure to stay in the big cities. They can take care of the water purity. We here in the Rockies have to rely on nature.