{"data":{"id":"us/40-cfr-52.2121","jurisdiction":"us","citation":"40 CFR 52.2121","heading":"Classification of regions.","body":"The South Carolina 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)\nAugusta (Georgia)-Aiken (South Carolina) Interstate I I III III III\nMetropolitan Charlotte Interstate I II III III I\nCamden-Sumter Intrastate II III III III III\nCharleston Intrastate I I III III III\nColumbia Intrastate II III III III III\nFlorence Intrastate III III III III III\nGeorgetown Intrastate II III III III III\nGreenville-Spartanburg Intrastate I III III III III\nGreenwood Intrastate III III III III III\nSavannah (Georgia)-Beaufort (South Carolina) Interstate I I 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 PP—South Carolina"],"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":"67477fe49b86ac6395056103417665b5ef0bc39d2d29e0ec38c2e02abfb01f90","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.2120","next":"us/40-cfr-52.2122"},"notice":"GroundRules: Original legal text. Not legal advice."}