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Mercury is a highly toxic element
is also broken free from rock and soil by acidic water. Small
amounts are also contained in the same smoke that causes acid
rain. Mercury can collect in the body tissue of fish. This build-up
of mercury has major health implications not only for fish, but
also other species that consume them. Birds such as loons, ducks,
eagles, herons, and others consume large quantities of fish.Mammals
such as fishers, bears and people are also at risk.
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Mercury Facts
w Mercury levels are high and pervasive in northeastern
North America, including the Adirondacks. *
w New research shows that many animals, even forest
songbirds, have elevated mercury burdens. Based on these findings,
it is increasingly clear that mercury can no longer be viewed
as strictly an aquatic pollutant. *
w "Mercury is an element that is found in
rocks in the earth's crust. Through mining
and industrial processes, mercury is
brought to the earth's surface and used in manufacturing, electricity
generation and consumer products (such as lamps, thermometers
and dental material).
Eventually, the mercury is emitted to the
air or discharged to water as a byproduct of combustion or improper
waste disposal.
Once in air and water, mercury presents
a risk to ecological and human health."***
w Mercury is a neurotoxin. Adults, children, and
developing fetuses are at risk from ingestion exposure to mercury.
The most common way people are exposed to any form of mercury
is by eating fish containing mercury. **
w Once in the human body, mercury interferes with
the brain and nervous system. Prenatal or early infant exposure
to mercury can cause a host of health issues in humans including
mental retardation, cerebral palsy, deafness, blindness, developmental
disorders which can delay motor and communication skills, and
learning
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Loons Affected
by Mercury
A multi-year
study of the health of New Yorks loon populations shows
that roughly 17 percent of all loons have unsafe mercury levels
in their blood and feathers. Like fish taken from Adirondack
waters by the NYS Health Department, the study showed a strong
correlation between acidified water bodies and mercury contamination.
Fish are the staple of loons diets. For a description of
the studys findings go to the Biodiversity Research Institutes
website www.briloon.org. The Adirondack Council
has been urging Congress to pass legislation that would curb
the power plant smokestack pollution that causes acid rain, much
of which also contains mercury. In the Adirondacks, airborne
mercury combines with mercury that is chemically released from
lake sediments and rocks by acidic water, multiplying the contamination
danger. This organic mercury is absorbed by the bodies of fish
and animals that eat fish, including humans, interrupting organ
function and reproduction, and damaging the nervous system.
Similar studies in New England have shown widespread contamination
in loons and fish. Maine had the highest contamination rate for
loons,
at 20 percent.
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disabilities. Scientists
are now studying links between mercury exposure and autism. Adult
exposure can cause memory and vision loss, tremors, and numbness
in extremities. Scientists are also studying links between mercury
and heart disease. ***
* BRI Study http://www.briloon.org/mercury/BRIMercury.pdf
** EPA website http://www.epa.gov/mercury/health.htm
*** NRDC website http://www.nrdc.org/health/effects/mercury/effects.asp
Department of Health Mercury
Warning
The NYS
Dept. of Health issued a warning in April 2005 urging that
women of child-bearing age and children younger than 15 avoid
eating northern pike, pickerel, walleye, largemouth bass,
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New York's Mercury Rule
In May 2006, DEC Commissioner
Denise Sheehan announced that New York would be implementing
its own mercury regulation and not participating in EPA's cap-and-trade
plan. On December 18, 2006, the State Environmental Board took
the final action to finalize New York's regulations. These regulations
call for a roughly 90 percent reduction of harmful mercury emissions
coming from New York coal-fired power plants by the year 2015.
The exact reduction is unclear because DEC is using the limit
of 0.6 pounds mercury per trillion Btu (0.6 lb Hg/TBtu) for all
affected plants starting in 2015.
If additional coal-fired plants come online, the reductions could
be less than 90 percent of current levels.
The Adirondack Council and other
environmental organizations had called for 90 percent reductions
to be in place by 2010 to speed up recovery and prevent tons
of mercury from needlessly entering our environment. We will
be calling on Governor Spitzer in the near future to examine
the possibility of moving up the time line for compliance to
2010.
Council's
Testimony on the New York State Mercury Rule
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smallmouth
bass and larger yellow perch from all waters in the Adirondack
and Catskill mountain regions because of mercury contamination.
Neither region receives more mercury deposition from smokestacks
than any other part of New York, but acid rain problems in both
parks accelerate the absorption of mercury into fish.
As acid rain subsides over the next few decades due to new state
and State Mercury Warnings Expanded federal regulations, the
leaching of mercury from soil and decaying plants will subside
as well. But people are advised to wait until the warnings are
withdrawn before resuming a steady diet of Adirondack or Catskill
predatory fish. Loons, mink, otters, migratory birds and other
fish-eating wildlife are harmed by mercury as well. Trout, catfish,
smelt and other popular food fish have not been found to have
elevated mercury levels. Mercury can effect a developing nervous
system as well as the development of organs in a fetus, infants
and young children. Some of the contaminants may also build up
in women and may be passed on during breast feeding, according
to the state Health Department. |
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Federal Mercury Regulations
On March 16, 2011, the U.S. EPA
released its proposed rule for mercury and other air toxics.
This proposal is open for public comment until July 5, 2011 and
you can read a copy of the Adirondack Council's action
alert.
This rule, for the first time
ever, would mandate reductions in mercury emissions from coal-fired
power plants. The 91 percent reductions over the next four years
and will have substantial human health and environmental benefits.
This rule would replace the Clean
Air Mercury Rule, which was proposed in 2005 and thrown out by
the courts in 2008.
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