The Technical Support Documents below support EPA's final Round 4 area designations for the 2010 sulfur dioxide air quality standard.
If you need assistance accessing any of the documents on this page, please contact Corey Mocka at mocka.corey@epa.gov.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Chapter 1 Background and History of the Intended Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard (PDF)(11 pp, 186 K)
- Chapter 2 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Areas without Violating Monitors (PDF)(4 pp, 149 K)
- Chapter 3 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Kentucky (PDF)(32 pp, 2 MB)
- Chapter 4 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Maryland and West Virginia (PDF)(2 pp, 120 K)
- Chapter 5 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Missouri (PDF)(37 pp, 4 MB)
- Chapter 6 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for New York (PDF)(32 pp, 2 MB)
- Chapter 7 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for North Carolina (PDF)(2 pp, 118 K)
- Chapter 8 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Texas (PDF)(221 pp, 26 MB)
- Chapter 9 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Virginia (PDF)(3 pp, 134 K)
- Chapter 10 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Washington (PDF)(2 pp, 119 K)
- Chapter 11 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Wisconsin (PDF)(2 pp, 117 K)
- Chapter 12 Final Round 4 Area Designations for the 2010 1-Hour SO2 Primary National Ambient Air Quality Standard for Pennsylvania (PDF)(1 pg, 114 K)