|
Protect Lake Michigan Reports
Executive Summary
Watch advocate Max Muller discussing the report's findings on Chicago Tonight: .wmv, 10 MB -- Get Windows Media Player: PC | MAC Watch a video of Illinois EPA Director Doug Scott: 1 MB | 2.8 MB As the new home of Illinois PIRG's environmental work, Environment Illinois can be contacted with any questions regarding this report. Mercury pollution from coal-fired power plants and other sources is making Illinois’s and our nation’s fish unsafe to eat. Coal-fired power plants are by far Illinois’s largest remaining anthropogenic source of this pollution, emitting more mercury than all other industries combined. Mercury released during coal combustion is deposited from the atmosphere into our waters, where it is converted by bacteria into methylmercury, a potent toxin that accumulates in fish that eventually end up on our dinner tables. This report considers two studies of mercury concentrations in the tissues of popular sport fish and finds that potentially unsafe levels of mercury contaminate fish throughout Illinois. Mercury is a potent neurotoxin that is particularly damaging to the developing brain. Even very low doses put developing fetuses and children at risk of developmental delays, decreased I.Q., and memory and attention difficulties. In April 2004, U.S. Environmental Protection Agency (EPA) scientists estimated that up to one in six women of childbearing age in the U.S. has sufficiently high mercury blood levels to put an unborn child at risk of neurological damage. Higher doses similarly impair adults and also increase the risk of heart attacks. The primary route of human exposure to mercury is eating contaminated fish. Coal-fired power plants are by far the largest source of human-created mercury emissions. Illinois’s 21 coal-fired power plants are the source of an estimated 71% of in-state mercury pollution. A third of this mercury is attributable to just a single company, Midwest Generation, a subsidiary of Edison International. Studies of mercury cycling in the environment tell us that much of this mercury will be deposited locally. When deposited in waterways, mercury is converted by bacteria into highly toxic methylmercury, which bioaccumulates up the aquatic food chain and into unsafe concentrations in popular sport fish. Even mercury that isn’t deposited locally has local implications, as it contributes to global mercury deposition which contaminates commercial ocean fish, some of which eventually end up on Illinoisans dinner tables. In Illinois, mercury contamination of fish is already so widespread that the Illinois Department of Public Health warns people to limit their consumption of Illinois predator species at the top of the food chain—species such as largemouth bass, flathead catfish, walleye and sauger. The mercury in these fish endangers everyone, but it does disproportionate harm to people in our communities for whom the state’s waters are central to life: sport anglers, subsistence and commercial fishermen, charter boat operators and their clients, Illinoisans who buy local fish at the market, and all of their families. In order to establish the severity and geographic distribution of the Illinois sport fish mercury contamination problem, this report considers the tissue mercury concentrations of 804 fish samples from the Illinois Fish Contaminant Monitoring Program (IFCMP) and 23 fish samples from U.S. EPA’s National Lake Fish Tissue Study (NLFTS). The FCMP provides the dataset on which Illinois bases its fish consumption advisories, while the NLFTS is the first nation-wide random sample survey of fish contaminant concentrations. Key findings of this report include: • The mean mercury concentration in Illinois fish samples was 0.16 parts per million (ppm), higher than U.S. EPA’s 0.13 ppm safe limit for women of average weight who eat fish twice per week. • Thirty-nine (39) percent of the fish samples exceeded the 0.13 ppm safe mercury limit for women of average weight who eat fish twice per week. • A largemouth bass caught in Sherman Park Lagoon in South Chicago had the highest mercury concentration of fish in either of the two studies at 1.40 ppm. For references, that is 0.40 ppm above the legal limit for fish sold in the United States. The second highest mercury concentration, at 1.07 ppm was found in a largemouth Bass in Kinkaid Lake, in Jackson County, and the third highest, at 0.94 ppm, was found in a largemouth bass in Cedar Lake, also in Jackson County. • Fifty-nine (59) percent of the fish samples exceeded the safe mercury limit for children of average weight under age three who eat fish twice a week; 50 percent of fish samples exceeded the safe limit for children ages three to five years; and 34 percent of samples exceeded the safe limit for children ages six to eight years. • In nearly half (36) of the 77 counties included in the studies, the average fish sample mercury concentration exceeded U.S. EPA’s safe limit for women. These counties are geographically distributed throughout the state. In 8 counties (Boone, DeKalb, Edwards, Effingham, Kane, Pope, Pulaski, and Schuyler), 100% of fish samples were contaminated above the safe limit. • In half (16) of 32 species included in the studies, the average fish sample mercury concentration exceeded U.S. EPA’s safe limit for women. These species were, in descending order of average mercury concentration, bigmouth buffalo, freshwater drum, striped bass, lake trout, spotted bass, sauger, smallmouth buffalo, spotted sucker, flathead catfish, largemouth bass, brown trout, Chinook salmon, white bass, channel catfish, carp, and white sucker. • In 66 of the 145 lakes and streams included in the studies, the average fish sample mercury concentrations exceeded U.S. EPA’s safe limit for women. The ten lakes with highest average fish sample mercury concentrations were, in descending order: Lusk Creek in Pope County, Monee Reservoir in Will County, Devil's Kitchen Lake in Williamson County, an unnamed lake in Tazewell County, Piscasaw Creek in Boon County, McKinley Park Lagoon in Cook County, Steven A. Forbes Lake in Marion County, Big Muddy Creek in Clay County, Kinkaid Lake in Jackson County, and Cedar Lake in Jackson County. These results show that potentially dangerous levels of mercury contamination are widespread in Illinois. Given recent research indicating that power plants contribute significantly to local mercury deposition and that decreasing rates of deposition are linked to reductions in fish tissue mercury levels, this report’ findings underscore the need to reduce mercury emissions as much and quickly as possible. Under the Bush administration, the U.S EPA is currently implementing a severely flawed mercury reduction rule that will allow power companies to buy, trade, and bank emissions credits instead of reducing pollution. The rule will allow plants to avoid installing mercury controls for a decade, may not achieve their meager reduction targets for another quarter century, and won’t remedy local hot spots of mercury pollution. In response to the insufficient federal rule, many states are pursuing more stringent mercury reductions of their own. Three states already have laws in effect that will reduce their mercury emissions by 90%, an achievable and affordable standard using modern emissions control technology. At the direction of Governor Rod Blagojevich, Illinois EPA on March 14th, 2006 finalized a proposed administrative rule to adopt a similar standard in Illinois. To protect public health by reducing mercury deposition that accumulates to toxic concentrations in fish, Illinois should adopt the proposed Illinois mercury rule.
|
