In this supplemental notice of proposed rulemaking (SNPR), EPA provides an opportunity for public comment on our conclusion that emissions from Iowa, Kansas, Michigan, Missouri, Oklahoma, and Wisconsin significantly contribute to downwind nonattainment or interfere with maintenance of the 1997 ozone National Ambient Air Quality Standards (NAAQS) in other states.
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76 FR 40662 (PDF)(9 pp, 182 K,
July 11, 2011)
Supplemental Notice of Proposed Rulemaking: Federal Implementation Plans for Iowa, Kansas, Michigan, Missouri, Oklahoma, and Wisconsin To Reduce Interstate Transport of Ozone