[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: 40CFR81.28] [Page 15] 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. 81.28 Metropolitan Baltimore Intrastate Air Quality Control Region. The Metropolitan Baltimore Intrastate Air Quality Control Region (Maryland) consists of the territorial area encompassed by the boundaries of the following jurisdictions or described area (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 Maryland: Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Harford County, Howard County.