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§ 52.1343 Control strategy: Sulfur dioxide.
(a) Determination of attainment. EPA has determined, as of September 13, 2017, that the Jefferson County 2010 SO2 nonattainment has attained the 2010 SO2 1-hr NAAQS. This determination suspends the requirements for this area to submit an attainment demonstration, associated reasonably available control measures, reasonable further progress, contingency measures, and other plan elements related to attainment of the standards for as long as the area continues to meet the 2010 SO2 1-hr NAAQS.