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Oklahoma is home to over 200 lakes — 71 of those have specific advisories about mercury in fish. This year, the lake at Fort Supply in Northwestern Oklahoma is the only new addition to that list, but the guidelines at other lakes have changed.
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The Oklahoma Department of Environmental Quality has updated its consumption advisory list of lakes with fish that may have mercury. Seven lakes have been added to the list, including Lake Hefner and Lake Tenkiller.
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In a 5-4 ruling, the court says the Environmental Protection Agency should have taken into account the costs of complying with regulation.