The U.S. Environmental Protection Agency (EPA) has designated 25 counties in Michigan as
nonattainment with the federal 8-hour ozone air quality standard. These redesignations from attainment to nonattainment have raised a number of questions,
primarily concerning the new applicable regulations and procedures for these counties.
OZONE NONATTAINMENT IMPLEMENTATION
AND NEW SOURCE REVIEW
In response to these questions, the Department of Environmental Quality
(DEQ), Air Quality Division staff is seeking to provide answers. We have
researched regulations, contacted EPA staff, and provided information to the Air
Quality Advisory Group. While some answers are relatively clear, others are
dependent on additional guidance and interpretation from EPA.
The DEQ's Q & A document addressing questions and answers to the best of our knowledge was
updated July 28, 2004, September 20, 2004, May 26, 2005, July 7, 2005, and
October 23, 2006. It was again updated on
May 24, 2007and this is now available to
This document is meant to be updated, as answers become clearer or need to be revised, and as
more questions arise. Please check back later to see if the document has been again updated.
If you have questions or comments, you may send them to Barb Rosenbaum firstname.lastname@example.org
or Lynn Fiedler at email@example.com.
In response to ongoing questions about nonattainment and New Source Review issues, the DEQ wrote to EPA Region 5 to outline the DEQ’s position on these
the April 12, 2004 letter to EPA.
For Web Page Technical Issues contact Joanne Foy at 517-373-7033 or