[Code of Federal Regulations] [Title 40, Volume 17] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR81.15] [Page 11] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 81_DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES--Table of Contents Subpart B_Designation of Air Quality Control Regions Sec. 81.15 Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware). The Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware) consists 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 Pennsylvania: Bucks County, Chester County, Delaware County, Montgomery County, Philadelphia County. In the State of New Jersey: Burlington County, Camden County, Gloucester County, Mercer County, Salem County. In the State of Delaware: New Castle County.