New report on mercury in fish, water, and sediment

A new report from U.S. Geological Society shows mercury contamination detected in every fish sampled in 291 streams across the country. Mercury (Hg) was examined in top-predator fish, bed sediment, and water from streams that spanned regional and national gradients of Hg source strength and other factors thought to influence methylmercury (MeHg) bioaccumulation. Sampled settings include stream basins that were agricultural, urbanized, undeveloped (forested, grassland, shrubland, and wetland land cover), and mined (for gold and Hg).

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