Released on April 20, 1998
Saskatchewan Environment and Resource Management (SERM) is advising
the public to limit their consumption of fish from Alameda and
Rafferty reservoirs. Samples show high levels of mercury in fish from
both reservoirs.
When the reservoirs were completed in 1992, naturally occurring
mercury in the soil seeped into the reservoirs. This mercury
accumulates in organisms such as insects and minnows which in turn are
eaten by larger fish such as walleye and northern pike.
SERM recognizes four levels of mercury in fish. Fish with mercury
levels below 0.5 parts per million (ppm) are safe for unlimited
consumption. Levels between 0.5 and 1.0 ppm require some consumption
restriction and levels between 1.0 and 1.5 ppm require greater
consumption restrictions. Fish with mercury levels greater than 1.5
ppm should not be consumed at all.
Mercury levels may be harmful to those who eat the fish on a regular
basis. Fish samples from Alameda Reservoir have mercury levels
between 1.0 and 1.5 ppm and only one meal of fish over a two week
period is recommended. Samples from Rafferty Reservoir have mercury
levels from 0.5 to 1.0 ppm and only one meal of fish over a one week
period is recommended. Pregnant women and children are advised not to
eat any fish from either reservoirs.
"Signs will be posted at access points on both reservoirs,
advising anglers of the mercury advisories in effect and the
recommended consumption levels," Bruce Howard, Sport Fish
Specialist said.
This mercury advisory will remain in effect until levels drop
below 0.5 parts per million in all fish tested.
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For more information, contact:
Bruce Howard
Fish and Wildlife Branch
Regina
Phone: (306) 787-2877