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Posted on: May 13, 2022

Updated Illinois Sport Fish Consumption Advisories: New methylmercury advisories issued

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SPRINGFIELD – The Illinois Department of Public Health (IDPH) announced updated consumption advisories today for sport fish caught in Illinois waters.  These changes are the result of continued sampling by the Illinois Fish Contaminant Monitoring Program (FCMP).

 This year, the IDPH has issued seven new site-specific methylmercury advisories and added Dongola Lake, Dutchman Lake, Lake Nellie, and White Hall City Lake to the list of waters with site-specific methylmercury advisories. In line with the statewide trend of declining polychlorinated biphenyl (PCB) levels, no new PCB advisories were issued.  Existing PCB advisories were relaxed for two waters (Horseshoe Lake (catfish) and Waukegan North Harbor) and removed from three others (Horseshoe Lake (common carp), Raccoon Lake, and Wabash River).

 In addition to this year’s site-specific updates, a statewide methylmercury advisory remains in place for all Illinois waters.  The statewide advisory cautions sensitive populations to eat no more than one meal per week of predatory fish, unless more restrictive site-specific advisories are in place due to elevated methylmercury levels.  Predatory fish include all species of black bass, gar, salmon, and trout, as well as striped bass, white bass, walleye, sauger, flathead catfish, muskellunge, northern pike, and associated hybrids. 

 Fish consumption advisories are based primarily on protecting sensitive populations, including women of childbearing age, pregnant women, fetuses, nursing mothers, and children younger than 15 years of age.  While there is no known immediate health hazard from eating contaminated fish from any Illinois water body, there are concerns about the effects of long-term, low-level exposure to chlordane, polychlorinated biphenyls (PCBs), and methylmercury in fish.

 The FCMP is a joint effort of the Illinois Environmental Protection Agency (IEPA), Illinois Department of Natural Resources (IDNR), Illinois Department of Agriculture, and IDPH. The fish are collected by IDNR and tested by IEPA. Advisories are issued by IDPH based on IEPA test results.  Fish advisories can be viewed on the IDPH fish advisories website or by using the interactive fish advisory map.


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