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News Release

U.S. Department of the Interior
U.S. Geological Survey

Release: September 19, 1997
Luis A. Fusté, Information Officer

Technical Announcement 97-2

Questions related to possible mercury contamination of walleye and other sport fishes in the upper Columbia River and Franklin D. Roosevelt Lake are addressed in a recently released fact sheet by the U.S. Geological Survey, Washington Water Science Center, in Tacoma, Washington. The fact sheet, produced in cooperation with the State of Washington Department of Health, discusses sources of mercury, concentrations in fish, and public health implications. Mercury levels in Lake Roosevelt walleye are compared with the levels of mercury found in other sport fishes in the rest of the United States and the standards designed to protect human health. Recommendations are made by the Department of Health on the maximum amount of walleye from Lake Roosevelt that people should eat.

Copies of Fact Sheet 102-97, "Are walleye from Lake Roosevelt contaminated with mercury?," by Martha L. Erwin and Mark D. Munn, are available from from the U.S. Geological Survey, 1200 Pacific Avenue, Suite 600, Tacoma, WA 98402 , telephone (253) 593-6510 or by e-mail at Another location to obtain free copies is the Earth Sciences Information Center, Room 135, U.S. Post Office, West 904 Riverside Avenue, Spokane, WA 99201, telephone (509) 353-2524, or by e-mail at

[For additional technical information, please contact Dr. Mark Munn at (253) 593-6530, Extension 238, or send email to]

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