A new analysis of mercury levels in state fish indicates we still need to watch what we eat and how often.
The DNR analysis looks at mercury concentrations between 1982 and 2005. It shows on average, mercury concentrations in popular fish such as walleye remain high in northern waters but are slowly dropping off. They are trending higher in southern waters.
But according to DNR fish toxicologist Candy Schrank there are still seventy three lakes in the north where walleye, pike, catfish and large mouth bass should not be eaten as often.
For men and older women a meal a week of walleye and bass used to be ok. Now the DNR is recommending a meal only once a month.
The study does not identify the source of mercury but shows the amount absorbed depends on the size, gender and location of the fish. Schrank says fish in the northern waters tend to absorb more mercury than fish in other areas.
Get a copy of the DNR's fish consumption guidelines at: http://dnr.wi.gov/fish/pages/consumption/