40 CFR § 81.189 - South Central Washington Intrastate Air Quality Control Region.
---
identifier: "/us/cfr/t40/s81.189"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.189 - South Central Washington Intrastate Air Quality Control Region."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.189"
section_name: "South Central Washington 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"
---
# 81.189 South Central Washington Intrastate Air Quality Control Region.
The South Central Washington Intrastate Air Quality Control Region 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 Washington: Benton County, Franklin County, Kittitas County, Klickitat County, Walla Walla County, Yakima County.