Secondary emissions control standards proposed by EPA

The U.S. Environmental Protection Agency (EPA) has opened public comment for proposals to secondary air quality standards for nitrogen oxides (NOx) and sulfur oxides (SOx) emissions.

EPA is proposing to set a secondary standard for NOx and SOx that would be identical to standards proposed in 2010. It also will retain existing secondary standards for both NOx and SOx. This comes after EPA reviewed what it said was best available science for cutting emissions.

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

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