MontanasNewsStation.com is reporting that a recent study has shown trout in Idaho's Silver Creek fly fishing destination to be contaminated with high levels of mercury.
The study by the U.S. Geological Survey on a sampling of 10 brown trout found the fish contained an average mercury level of .48 parts per million.
Jim Vannoy, program manager at the Idaho Division of Public Health, says that's above the safe level of 0.1.
Some of the fish were taken from The Nature Conservancy's Silver Creek Preserve, a fly fishing destination that draws anglers from around the nation.
The preserve is catch and release, but anglers can keep fish in other parts of the system.