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Clean Air Markets

Progress Report

Acid Deposition

Acid deposition, commonly known as "acid rain," is a broad term referring to the mixture of wet and dry deposition from the atmosphere containing higher than normal amounts of sulfuric acids and nitric acids. The precursors of acid deposition are primarily the result of emissions of sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) from fossil fuel combustion; however, natural sources, such as volcanoes and decaying vegetation, also contribute a small amount.

Acid Deposition Figures

Wet Sulfate Deposition Map
Three-Year Wet Sulfate Deposition
Wet Inorganic Nitrogen Deposition Map
Three-Year Wet Inorganic Nitrogen Deposition
Regional Trends in Deposition
Regional Trends in Deposition

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