[Code of Federal Regulations] [Title 40, Volume 17] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR81.61] [Page 21] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 81_DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES--Table of Subpart B_Designation of Air Quality Control Regions Sec. 81.61 Evansville (Indiana)-Owensboro-Henderson (Kentucky) Interstate Air Quality Control Region. The Evansville (Indiana)-Owensboro-Henderson (Kentucky) Interstate Air Quality Control Region is revised to consist of the territorial area encompassed by the boundaries of the following jurisdictions (including the territorial area of all municipalities (as defined in section 302(f) of the Clean Air Act, 42 U.S.C. 1857h(f)) geographically located within the outermost boundaries of the area so delimited): In the State of Kentucky: Daviess County, Hancock County, Henderson County, McLean County, Ohio County, Union County, Webster County. In the State of Indiana: Dubois County, Gibson County, Perry County, Pike County, Posey County, Spencer County, Vanderburgh County, Warrick County.