Illinois Fish Advisory
Illinois Fish Advisory | Special Mercury Advisory

2009 SPECIAL MERCURY ADVISORY

Mercury is found in the environment because of natural and human activities. When moving through the environment, mercury goes through a series of complex changes. Through these changes in lake and river sediments, an organic form of mercury – methylmercury – is created. Methylmercury is very persistent in the environment and moves up the food chain to predator species. It can accumulate in people who eat these predator species. Predator species of fish include all species of black bass (largemouth, smallmouth and spotted), striped bass, white bass, hybrid striped bass, walleye, sauger, saugeye, flathead catfish, muskellunge and northern pike.

In order to protect the most sensitive populations, pregnant or nursing women, women of childbearing age and children younger than 15 years of age are advised to eat no more than one meal per week of predator fish. Since women beyond childbearing age and males older than 15 years of age are at less risk for the effects of methylmercury, these groups may continue to enjoy as many meals of predator fish as they please. For more information, see Facts About Illinois' Methylmercury Advisory.

More restrictive meal advice applies to fish taken from the following bodies of water.


Water Fish Species Women, beyond childbearing age, males more than 15 years old Pregnant or nursing women, women of childbearing age, children less than 15 years old
Ohio River Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Rock River
(Rockford to Milan Steel Dam)
Flathead Catfish (larger than 29) 1 meal/week 1 meal/month
Arrowhead Lake
(Cook County)
Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Campus Lake
(Southern IL Univ.)
Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Cedar Lake
(Jackson County)
Largemouth Bass (larger than 12)

White Crappie (all sizes)
1 meal/week

unlimited
1 meal/month

1 meal/week
Devil's Kitchen Lake
(Williamson County)
Largemouth Bass (all sizes)

Black Crappie (all sizes)
1 meal/week

1 meal/week
1 meal/month

1 meal/month
Evergreen Lake
(McLean County)
Largemouth Bass (larger than 19) 1 meal/week 1 meal/month
Heidecke Lake*
(Grundy County)
Smallmouth Bass (larger than 18) 1 meal/week 1 meal/month
Kinkaid Lake
(Jackson County)
Largemouth Bass (all sizes)

Walleye (all sizes)

White Crappie (all sizes)
1 meal/week

1 meal/week

unlimited
1 meal/month

1 meal/month

1 meal/week
Lake Bracken
(Knox County)
Largemouth Bass (larger than 17) 1 meal/week 1 meal/month
Lake Renwick East*
(Will County)
Largemouth Bass (larger than 14) 1 meal/week 1 meal/month
Lake in the Hills
(McHenry County)
Largemouth Bass (larger than 15) 1 meal/week 1 meal/month
Little Grassy Lake
(Williamson County)
Largemouth Bass (all sizes)

White & Black Crappie (all sizes)
1 meal/week

unlimited
1 meal/month

1 meal/week
Mt. Olive New City Lake
(Macoupin County)
Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Little Wabash River and Tributaries Carp (all sizes)

Largemouth Bass (all sizes)

Spotted Bass (all sizes)

White Crappie (all sizes)
1 meal/week

1 meal/week

1 meal/week

unlimited
1 meal/month

1 meal/month

1 meal/month

1 meal/week
Marquette Park Lagoon
(Cook County)
Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Midlothian Reservoir
(Cook County)
Largemouth Bass (larger than 14) 1 meal/week 1 meal/month
Monee Reservoir
(Will County)
Largemouth Bass (all sizes) 1 meal/week 1 meal/month
Sam Parr Lake*
(Jasper County)
Largemouth Bass (larger than 12)

Crappie (all sizes)
1 meal/week

unlimited
1 meal/month

1 meal/week
Wabash River Sauger (larger than 12) 1 meal/week 1 meal/month
* = Denotes change for the 2009 season.