[fuzztester]

Yep, thought of that as soon as I read the parent and GP comments.

And I have also thought of the same point on my own before.

And it's not just:

>could give you tons of diarrhea due to some animals taking a dump nearby.

But also: from all the way upstream (from aquatic animal life), and from the upstream watersheds (from terrestrial animal life), which, all together, is a shit-ton of dumps, pun not intended.