{"data":{"id":"us/40-cfr-81.44","jurisdiction":"us","citation":"40 CFR 81.44","heading":"Metropolitan Memphis Interstate Air Quality Control Region.","body":"The Metropolitan Memphis Interstate Air Quality Control Region (Arkansas-Mississippi-Tennessee) 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 sec. 302(f) of the Clean Air Act, 42 U.S.C. 1857h(f)) geographically located within the outermost boundaries of the area so delimited):\nIn the State of Arkansas: Crittenden County.\nIn the State of Mississippi: De Soto County.\nIn the State of Tennessee: Shelby County.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES","Subpart B—Designation of Air Quality Control Regions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"c9f8688aad86434145168f9f3da5b309b12ae0f002346f0cee9fae18de605b07","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.43","next":"us/40-cfr-81.45"},"notice":"GroundRules: Original legal text. Not legal advice."}