mercury and other pollutants are raining down from the sky coming from as far away as China...
"in every body of water",
so the older the fish the longer the exposure
is basically the rule ...
so a 28.5 inch fish has had the least exposure than anything larger.
Better to eat some Alaskan fish and return the game fish back to Spawn.
What Raven said has merit. Hudson River bass used to have high levels of PCB's as well. Of course, given the migratory nature of stripers, one may catch a Hudson River fish in RI or MA for that matter.