40 CFR § 81.47 - Central Oklahoma Intrastate Air Quality Control Region.
---
identifier: "/us/cfr/t40/s81.47"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.47 - Central Oklahoma Intrastate Air Quality Control Region."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.47"
section_name: "Central Oklahoma Intrastate Air Quality Control Region."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "81"
part_name: "DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401,"
regulatory_source: "36 FR 22421, Nov. 25, 1971, unless otherwise noted."
cfr_part: "81"
---
# 81.47 Central Oklahoma Intrastate Air Quality Control Region.
The Metropolitan Oklahoma Intrastate Air Quality Control Region has been renamed the Central Oklahoma 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 Oklahoma: Canadian County, Cleveland County, Grady County, Lincoln County, Logan County, Kingfisher County, McClain County, Oklahoma County, Pottawatomie County.