{"data":{"id":"us/40-cfr-52.71","jurisdiction":"us","citation":"40 CFR 52.71","heading":"Classification of regions.","body":"The Alaska plan was evaluated on the basis of the following classifications:\nAir quality control Region Pollutant\nParticulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone\nCook Inlet Intrastate I III III I III.\nNorthern Alaska Intrastate I III III I III.\nSouth Central Alaska Intrastate III III III III III.\nSoutheastern Alaska 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 C—Alaska"],"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":"46d07eca29cc2f9c3585f6f7ffa6389b1b12e7a8d2453579d65a0a614346ddf2","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.70","next":"us/40-cfr-52.72"},"notice":"GroundRules: Original legal text. Not legal advice."}