{"data":{"id":"us/40-cfr-52.2521","jurisdiction":"us","citation":"40 CFR 52.2521","heading":"Classification of regions.","body":"The West Virginia 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)\nSteubenville-Weirton-Wheeling Interstate I I III III III\nParkersburg-Marietta Interstate I II III III III\nHuntington-Ashland-Portsmouth-Ironton Interstate I III III III III\nKanawha Valley Intrastate I III III III III\nSouthern West Virginia Intrastate III III III III III\nNorth Central West Virginia Intrastate I III III III III\nCumberland-Keyser Interstate I I III III III\nCentral West Virginia Intrastate III III III III III\nAllegheny Intrastate III III III III III\nEastern Panhandle Intrastate III 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 XX—West Virginia"],"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":"9b0af441b696971d450e1f73f1f62f74331a4248a598240f1a1e29ac40cf16fa","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.2520","next":"us/40-cfr-52.2522"},"notice":"GroundRules: Original legal text. Not legal advice."}