Round 1: Muscatine Nonattainment Area
remainder of state on march 2, 2015, the u.s. district court for the northern district of california accepted a consent decree to resolve litigation concerning the deadline for completing designation for the 2010 1-hour so2 naaqs. the consent decree requires that designations for all remaining undesignated areas in the country be completed in three additional rounds: the first round by july 2, 2016, the second round by december 31, 2017, and the final round by december 31, 2020.
a summary of actions undertaken in these new rounds of designations are provided below. additional information regarding the consent decree and the 1-hour so2 designations process can be found on epa’s website: https://www.epa.gov/sulfur-dioxide-designations
Round 2: July 2, 2016 Deadline
The state has provided to EPA updated designation recommendations for three counties in Iowa (Des Moines, Wapello, and Woodbury) affected by this round of designations. EPA has not yet finalized designations under this round, but must do so by July 2, 2016.
Round 3: December 31, 2017 Deadline
On January 5, 2017, the State provided to EPA an amended designation recommendation for all areas in the State not yet designated for the 2010 1-hour SO2 NAAQS. A technical support document that also addressed information required to be submitted under the Data Requirements Rule accompanied the updated recommendation. EPA must consider the State’s amendment and finalize 1-hr SO2 designations for Round 3 by December 31, 2017.
Round 4: December 31, 2020 Deadline
If there are any remaining undesignated areas in the state, they will be designated in this round, which must be completed by December 31, 2020.
Annual Reporting Requirements
On August 21, 2015, the U.S. Environmental Protection Agency (EPA) published the Data Requirements Rule for the 2010 1-Hour Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standard) (DRR, 80 FR 51051). The rule added provisions in 40 CFR 51.1205(b) that require air agencies to submit a report to EPA documenting sulfur dioxide (SO2) emissions in areas were modeling of actual SO2 emissions served as the basis for designating the area attainment for the 2010 1-hour SO2 NAAQS. The report must include an assessment of the cause of any emissions increases from the previous year and a recommendation regarding whether additional modeling is needed.