Proposed Supplemental Action on the Cross-State Air Pollution Rule:

Fact Sheet

Action

•	In this supplemental action, entitled "Federal Implementation Plans for Iowa, Kansas, Michigan,
Missouri, Oklahoma, and Wisconsin to Reduce Interstate Transport of Ozone," the US
Environmental Protection Agency (EPA) is proposing to expand the ozone season NOx program in
the final rule entitled "Federal Implementation Plans to Reduce Interstate Transport of Fine
Particulate Matter and Ozone" (Cross-State Air Pollution Rule), which is being finalized in a
separate action today.

•	EPA is proposing to include Iowa, Kansas, Michigan, Missouri, Oklahoma, and Wisconsin in the
Cross-State Air Pollution Rule's ozone season NOx program. Five of these states - Iowa, Kansas,
Michigan, Missouri, and Wisconsin - are also included in the fine particle control program of the
Cross-State Air Pollution Rule being finalized today, requiring year-round (as opposed to just
summertime) NOx reductions in these states.

•	The Cross-State Air Pollution Rule together with this supplemental action will protect the health of
millions of Americans by helping states reduce air pollution and attain clean air standards. The
Cross-State Air Pollution Rule requires 27 states to significantly improve air quality by reducing
power plant emissions that contribute to ozone and fine particle pollution in other states; this
proposal would bring the total number of states covered to 28.

•	In this supplemental notice of proposed rulemaking, EPA is providing an opportunity for public
comment on the Agency's conclusion that Iowa, Kansas, Michigan, Missouri, Oklahoma and
Wisconsin significantly contribute to nonattainment or interfere with maintenance of the 1997 ozone
National Ambient Air Quality Standard (NAAQS) in other states.

•	Air quality modeling conducted for the final Cross-State Air Pollution Rule demonstrates that these
six states significantly contribute to nonattainment or interfere with maintenance of the 1997 ozone
NAAQS in one or more downwind states.

o The air quality modeling for the final Cross-State Air Pollution Rule identified two
counties that were not included in the proposed rule - Allegan County, MI and Harford
County, MD - as having trouble maintaining the 1997 ozone standards,
o EPA's modeling shows that Iowa, Kansas, Missouri, Oklahoma, and Wisconsin

contribute to maintenance problems in Allegan County, MI and that Michigan contributes
to the problem in Harford County, MD.

•	The supplemental proposal would require these six states to reduce summertime NOx emissions as
part of the Cross-State Air Pollution Rule ozone-season control program. This supplemental
proposal would assure that, based on the modeling supporting the final Cross-State Air Pollution
Rule, downwind contributions of air pollutants that form ozone and fine particle pollution are
controlled for all areas having problems attaining and maintaining the 1997 and 2006 standards.

•	The EPA is also proposing ozone season NOx emissions budgets for covered units (generally large
electric generating units) in the six states.


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•	The proposal is open for public review and comment for 45 days after publication in the Federal
Register. A public hearing, if requested, will be held in Washington, D.C. on July 21, 2011. EPA
expects to finalize this rulemaking on or before November 1, 2011.

Background

•	On July 6, 2010, EPA proposed the Cross-State Air Pollution Rule. In that proposal, Iowa, Missouri
and Wisconsin were not included in the proposed ozone season NOx program.

•	This supplemental proposed rule is projected to limit ozone season NOx emissions (May -
September) in Iowa, Kansas, Michigan, Missouri, Oklahoma and Kansas beginning in 2012.

How to Comment

•	Submit your comments, identified by Docket ID No. EPA-HQ-OAR-2009-0491, by one of the
following methods:

•	http://www.regulations.gov. Follow the on-line instructions for submitting comments.

•	E-mail: a-and-r-docket@epa.gov,

•	Fax: 202-566-9744.

•	Mail: Environmental Protection Agency, EPA Docket Center (EPA/DC), Air and Radiation
Docket and Information Center, Mail Code: 6102T, 1200 Pennsylvania Ave., NW, Washington,
DC, 20460. Please include two copies.

•	Hand Delivery: U. S. Environmental Protection Agency, EPA West (Air Docket), 1301
Constitution Avenue, Northwest, Room 3334, Washington, DC. Such deliveries are only
accepted during the Docket's normal hours of operation, and special arrangements should be
made for deliveries of boxed information.

Additional Information

•	Interested parties can download the proposal from EPA's web site on the Internet under recent
actions at the following address: http://www.epa/gov/airtransport.

•	Today's supplemental proposal and other background information are also available either
electronically at http://www.regulations.gov. EPA's electronic public docket and comment system,
or in hardcopy at the EPA Docket Center's Public Reading Room.

o The Public Reading Room is located in the EPA Headquarters, Room Number 3334 in
the EPA West Building, located at 1301 Constitution Ave., NW, Washington, DC. Hours
of operation are 8:30 a.m. to 4:30 p.m. eastern standard time, Monday through Friday,
excluding Federal holidays,
o Visitors are required to show photographic identification, pass through a metal detector,
and sign the EPA visitor log. All visitor materials will be processed through an X-ray
machine as well. Visitors will be provided a badge that must be visible at all times,
o Materials for this action can be accessed using EPA-HQ-OAR-2009-0491.

• For additional information on this action, please contact Jeb Stenhouse at stenhouse.ieb@epa.gov.
or 202-343-9781.


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