On July 25, 2013, the U.S. Environmental Protection Agency (EPA) finalized nonattainment designations for the 2010 1-hour sulfur dioxide (SO2) national ambient air quality standard (NAAQS). The designations will be effective 60 days after publication of EPA’s final rule in the Federal Register, which should occur in the next few weeks. For Florida, portions of Hillsborough and Nassau Counties will be designated nonattainment, which is consistent with the Florida Department of Environmental Protection’s recommendations. A copy of EPA’s prepublication final rule is available here. While EPA is proposing initial nonattainment designations based on available monitoring data, the agency has explicitly stated it is not proposing designations for other areas, which EPA will address in future actions. As previously reported by HGS, for these other areas, EPA has issued a February 6, 2013, “next steps” document outlining the anticipated approach to making future area designations. Additional information regarding EPA’s continuing implementation of the 2010 1-hour SO2 NAAQS is available on EPA’s website here.
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