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Policy Assessment for the Review of the Primary National Ambient Air Quality Standard for Sulfur Oxides

August 24, 2017
By Staff Environmental Protection Agency

Current standards for sulfur dioxide are protective of human health with an adequate margin of safety.

Review finds the current standard of 75 parts per billion of sulfur dioxide does not need to be revised downward or made more stringent since the best available evidence indicates the current standard set in 2010 protects human health with an adequate margin of safety.