EPA is responding to a request related to final designations for the 2010 health based sulfur dioxide air quality standard for Williamson County, IL.
See EPA's proposed response to this petition.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Petition for Error Correction in Final Rule Designating Williamson County, Illinois as Nonattainment under Air Quality Designations for the 2010 Sulfur Dioxide (SO2) National Ambient Air Qulaity Standard - Round 2 (PDF)(14 pp, 1 MB)
- Response Letter to Peter S. Glaser on Petition for Error Correction for Williamson County, IL (PDF)(2 pp, 420 K)