{"data":{"id":"us/40-cfr-52.1821","jurisdiction":"us","citation":"40 CFR 52.1821","heading":"Classification of regions.","body":"The North Dakota 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)\nMetropolitan Fargo-Moorhead Interstate II III III III III\nNorth Dakota 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 JJ—North Dakota"],"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":"f60530ed14c87bd240ca9698ac4cc3b8cd6cefd7a77c42d5db2881f26c8b073b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.1820","next":"us/40-cfr-52.1822"},"notice":"GroundRules: Original legal text. Not legal advice."}