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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Methylmercury in Freshwater Fish, 2020 Comparison Study |
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Methylmercury in Freshwater Fish, 2020 Comparison Study (Number of pages: 41) (Publication Size: 4541KB)
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| Author(s) | Foster, K., and C. Mathieu | ||||
| Description | In 2020, the Washington State Department of Ecology (Ecology) analyzed total mercury and methylmercury in 40 freshwater fish fillet samples collected from four lakes to characterize percent methylmercury content. Species included largemouth bass (Liberty Lake, Loon Lake, Silver Lake) and smallmouth bass (Lake Spokane). Methylmercury results were compared to total mercury concentrations measured in the paired samples, and relationships with fish growth characteristics were evaluated. Total mercury and methylmercury were present in all tissue samples. The average percent methylmercury level was 66% (±16%), which is lower than the 95% conservative estimate referenced by the U.S. Environmental Protection Agency (EPA) in their guidance for state fish contaminant monitoring programs. Overall, percent methylmercury, total mercury concentrations, and methylmercury concentrations varied widely across bass size, age, and location. |
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The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
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| Contact | Katelyn Foster at 360-706-4888 or katelyn.foster@ecy.wa.gov | ||||
| Keywords | fish tissue, mercury, methylmercury, Largemouth bass, smallmouth bass | ||||
| WEB PAGE | Mercury in fish tissue | ||||
| WATERSHED | Water Resource Inventory Areas (WRIA 26,WRIA 57,WRIA 54,WRIA 59) |
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| DATA | Environmental Information Management (EIM) #HgFish20 |
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| RELATED PUBLICATIONS | Title:
Quality Assurance Project Plan: Measuring Mercury Trends in Freshwater Fish in Washington State |
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