{"data":{"id":"us/40-cfr-52.1271","jurisdiction":"us","citation":"40 CFR 52.1271","heading":"Classification of regions.","body":"The Mississippi plan was evaluated on the basis of the following classifications:\nAir quality control region Pollutant\nParticulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)\nMobile (Alabama)-Pensacola-Panama City (Florida)-Gulfport (Mississippi) Interstate I I III III I\nMetropolitan Memphis Interstate I III III III I\nMississippi Delta Intrastate III III III III III\nNortheast Mississippi Intrastate II III III III III","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS","Subpart Z—Mississippi"],"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":"445926830515ef671b7c023b3e42dbacba5ad91cf12e986917fd4c62f0519049","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.1270","next":"us/40-cfr-52.1272"},"notice":"GroundRules: Original legal text. Not legal advice."}