Methylmercury is the kind of mercury that contaminates fish. This contamination is bound to the fish muscle, so cutting off the skin and fat, filleting or preparing fish in a special way does not reduce mercury levels in the flesh of fish. Mercury contamination is a worldwide problem that comes from many sources. It occurs naturally in rocks, soils, water and air. Volcanoes may also be a source of mercury in the environment.
Industrial pollution is also a source of mercury in the environment.
Burning fossil fuels like coal and burning industrial or household wastes releases mercury into the air. This settles onto oceans, lakes and rivers where fish absorb it. Though statewide data on mercury contamination of fresh water fish is limited, nationally it appears to show that bass, pike and walleye have higher levels of mercury than other species. This is the first time that a fish advisory has been issued statewide. Send mail to the Webmaster.