I don't know anything about this, but contamination seems plausible, as you say, and it would probably make sense for California to update its regulations to ma

I don't know anything about this, but contamination seems plausible, as you say, and it would probably make sense for California to update its regulations to make sure the crops grown with this water are safe for consumption. I think this is a pretty unusual situation. As far as I know, most spent frack fluid is reused in oilfield operations or disposed of in deep disposal wells.