I live within walking distance of a lake. We take frequent walks there. If I so much as touch the water with my big toe, I could get a ticket/citation. If I insist, I could be arrested. If I jump into the water (even wearing a floatation vest), same thing. You are only allowed to be in the water while lifeguards are present, and only for a few seconds if you fall off your paddleboard or something like that. If you are walking along the shore with water up to your ankles, lifeguard or not, you could be cited.
No, this is not a source of drinking water at all.
Every time I go to the lake I have the same thought: So much for "land of the free".
Note: Yes, of course, I understand this is mostly because people have sued and extracted money from the State/County, etc. That's likely the root cause. The solution isn't to ban everyone.