"...a study saying the animals in this part of the US were tested and found to have a low incidence of various pollutants in their systems..."


If that were to happen, I suspect that those critters would be wiped out in short order, laws and regs notwithstanding. You would not be the only person to want to go there. Either they get killed off, or the population, and therefore the polution, would increase, causing the same old problem...