Mercury Maps are available below for the six GLIFWC member tribes in Wisconsin as well as the 1837 ceded territory of Minnesota and portions of the 1842 ceded territory of Michigan. The Mercury Maps for Wisconsin and Michigan show the lakes from which ogaa are typically harvested by a given member tribe. The Minnesota map shows all lakes in the 1837 ceded territory of Minnesota that are available for tribal harvest. To reduce your exposure, GLIFWC recommends that you limit the number of servings of ogga eaten per month due to mercury in these fish. Follow the instructions below to promote the safe consumption of maazhiginoozhe.
The top map applies to women of childbearing age and children under 15 years of age. The bottom map applies to the remainder of the population, men 15 years of age and older and women beyond childbearing age. Each lake on the map is color coded to display how many meals of walleye per month from that lake have been deemed safe to eat. As can be seen on the two maps, fewer meals are recommended for children under the age of 15 and women of childbearing age in order to protect the developing brain of the fetus or child from the potential detrimental effects of mercury. Click the button above the map you would like to view.
- Sort and label ogaa prior to freezing
- Put ogaa under 20 inches in bags labeled "under 20 inches"
- Put ogaa over 20 inches in bags labeled "over 20 inches"
- Label bags with the name of the lake where the fish were harvested
- Follow the advice provided on the mercury maps for the maximum safe number of ogaa meals per month
- Eat smaller ogaa (those under 20 inches) and ogaa from lakes with lower mercury levels such as those lakes color-coded blue or green as seen on mercury maps
GLIFWC • P.O. Box 9 – 72682 Maple Street • Odanah, WI 54861 • (715) 682-6619 • glifwc.org