The DNR invites the public to provide comment on the 2019 report for the sulfur dioxide (SO2) Data Requirements Rule (DRR). The DRR requires an annual assessment of recent SO2 emissions in any area where air quality modeling of actual emissions provided the basis for designating the area attainment for the 2010 1-hour SO2 national ambient air quality standard (NAAQS).
Two areas in Iowa are currently subject to this review, Louisa County and Pottawattamie County. The DNR is recommending that additional modeling is not needed to conclude that these areas continue to attain the 2010 1-hour SO2 NAAQS. This recommendation is based on documented reductions in SO2 emissions.
The report, due to EPA by July 1, is available on the Air Quality Bureau’s Public Participationpage under Public Input. Written comments must be received by June 7, 2019, and may be sent to:
Iowa Department of Natural Resources
Air Quality Bureau
c/o Matthew Johnson
502 E 9th St
Des Moines, IA 50319
Or email to Matthew.Johnson@dnr.iowa.gov.