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What is the main source of mercury in natural waterways in the US?

April 26, 2017Geography main mercury natural source waterways

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What is the main source of mercury in natural waterways in the US?

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“Mercury is naturally occurring, but most of the mercury entering waterbodies comes from mercury released by human activities. The main pathway of mercury to surface water is through atmospheric deposition. Major sources of mercury to the atmosphere include the burning coal and petroleum, metal smelting, and the use of mercury in manufacturing and products (such as switches, dental amalgam, and measuring instruments).” from http://www.pca.state.mn.us/water/tmdl/index.