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Higher mercury in St Louis River walleyes in eastern Minnesota comes from old pollution
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Higher mercury in St Louis River walleyes in eastern Minnesota comes from old pollution
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Higher mercury in St Louis River walleyes in eastern Minnesota comes from old pollution
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Areas of Concern: Polycyclic Aromatic Hydrocarbons (PAH) Source Tracking in Milwaukee River
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Higher mercury in St. Louis River walleyes comes from old pollution
A new study shows mercury in the estuary sediment was left by industry decades ago. It continues to build up in fish, making some unsafe to eat. 6:05 am, Apr. 17, 2021 ×
Clough Island in the St. Louis River estuary. A new study has found that the source of unusually high mercury levels in estuary fish is legacy mercury from decades ago that remains in the sediment. (Bob King/ News Tribune file / 2012)
For decades now, health officials in Minnesota and Wisconsin have warned people to limit their meals of walleyes from the St. Louis River estuary in Duluth and Superior because of unsafe levels of toxic mercury.