40 CFR §81.21
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The San Francisco Bay Area Intrastate Air Quality Control Region consists of the territorial area encompassed by the boundaries of the following jurisdictions (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):