I find it is useful to try to disprove your own beliefs before confidently claiming something to be true. The resources are out there and not terribly difficult to locate if you put a modicum of effort into it.
Many farmers in my state water from rivers on their land that aren't even large enough to get EPA attention let alone direct regulation. I think you're under the impression everyone with a vegetable stand is Cargill or something.
I find it is useful to try to disprove your own beliefs before confidently claiming something to be true. The resources are out there and not terribly difficult to locate if you put a modicum of effort into it.