CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES > SUBPART B—Designation of Air Quality Control Regions (§81.11 to §81.275) > 81.16—Metropolitan Denver Intrastate Air Quality Control Region.

81.16—Metropolitan Denver Intrastate Air Quality Control Region.

The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) 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 Colorado: Adams County, Arapahoe County, Boulder County, Clear Creek County, Denver County, Douglas County, Gilpin County, Jefferson County.

Code of Federal Regulations

(Sec. 301(a), 81 Stat. 490, 504; 42 U.S.C. 1857g(a) , as amended by sec. 15(c)(2) of Pub. L. 91-604)

Code of Federal Regulations

Note: For purposes of identification, the Regions are referred to by Colorado authorities as follows: Sec. 481.172Comanche Intrastate Air Quality Control Region: Region Three. 481.173Grand Mesa Intrastate Air Quality Control Region: Region Seven. 481.174Pawnee Intrastate Air Quality Control Region: Region One. 481.175San Isabel Intrastate Air Quality Control Region: Region Four. 481.176San Luis Intrastate Air Quality Control Region: Region Five. 481.177Yampa Intrastate Air Quality Control Region: Region Eight. 481.16Metropolitan Denver Intrastate Air Quality Control Region: Region Two.