40 CFR § 81.102 - Metropolitan Quad Cities Interstate Air Quality Control Region.
---
identifier: "/us/cfr/t40/s81.102"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 81.102 - Metropolitan Quad Cities Interstate Air Quality Control Region."
title_number: 40
title_name: "Protection of Environment"
section_number: "81.102"
section_name: "Metropolitan Quad Cities Interstate 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"
---
# 81.102 Metropolitan Quad Cities Interstate Air Quality Control Region.
The Metropolitan Quad Cities Interstate Air Quality Control Region (Illinois-Iowa) 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 Illinois: Carroll County, Henry County, Mercer County, Rock Island County, Whiteside County.
In the State of Iowa: Clinton County, Louisa County, Muscatine County, Scott County.