Elevated Mercury levels in Channel Cats in the Green

[kokeking]

Ok i got a question.Since i dont live in utah i have no idea where desalation caynon is,but iam assuming that the green river flows into it and back out.Since the green river flows into flaming gorge and back out,would the fish in the gorge have a high mercury content?Or is the mercury getting into the water way down stream form the gorge?
[signature]