{"data":{"id":"us/40-cfr-52.2421","jurisdiction":"us","citation":"40 CFR 52.2421","heading":"Classification of regions.","body":"The 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)\nEastern Tennessee-Southwestern Virginia Interstate I I III III III\nValley of Virginia Intrastate I III III III III\nCentral Virginia Intrastate I III III III III\nNortheastern Virginia Intrastate IA III III III III\nState Capital Intrastate I III III III I\nHampton Roads Intrastate I II III III I\nNational Capital Interstate I I III I I","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS","Subpart VV—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":"cabd2210017f542fd6d68d5b60804370db0b210448dadfd45aec0af8999c8f10","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.2420","next":"us/40-cfr-52.2422"},"notice":"GroundRules: Original legal text. Not legal advice."}