Secondary Air Quality Standards For Nitrogen Oxides And Sulfur Oxides

U.S. Environmental Protection Agency (EPA) is proposing secondary air quality standards for nitrogen oxides (NOx) and sulfur oxides (SOx). The new standards would be identical to the public health standards finalized in 2010. EPA is proposing to retain the existing secondary standards for each pollutant.

EPA will accept comments for 60 days after the proposed rule is published in the Federal Register and will issue a final rule by March 2012.

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