e-CFR banner

Home
gpo.gov
govinfo.gov

e-CFR Navigation Aids

Browse

Simple Search

Advanced Search

 — Boolean

 — Proximity

 

Search History

Search Tips

Corrections

Latest Updates

User Info

FAQs

Agency List

Incorporation By Reference

eCFR logo

Related Resources

 

Electronic Code of Federal Regulations

e-CFR data is current as of December 5, 2019

Title 40Chapter ISubchapter CPart 81Subpart B → §81.88


Title 40: Protection of Environment
PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES
Subpart B—Designation of Air Quality Control Regions


§81.88   Billings Intrastate Air Quality Control Region.

The Metropolitan Billings Intrastate Air Quality Control Region (Montana) has been renamed the Billings Intrastate Air Quality Control Region and 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 Montana: Big Horn County, Carbon County, Fergus County, Golden Valley County, Judith Basin County, Musselshell County, Petroleum County, Stillwater County, Sweet Grass County, Wheatland County, Yellowstone County.

(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)

Note: For purposes of identification, the Regions are referred to by Montana authorities as follows:

Sec.

481.168   Great Falls Intrastate Air Quality Control Region: Region II.

481.169   Helena Intrastate Air Quality Control Region: Region IV.

481.170   Miles City Intrastate Air Quality Control Region: Region III.

481.171   Missoula Intrastate Air Quality Control Region: Region I.

481.88   Billings Intrastate Air Quality Control Region: Region V.

Need assistance?