{"data":{"id":"us/40-cfr-52.1571","jurisdiction":"us","citation":"40 CFR 52.1571","heading":"Classification of regions.","body":"The New Jersey 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)\nNew Jersey-New York-Connecticut Interstate I I I I I\nMetropolitan Philadelphia Interstate I I III I I\nNortheast Pennsylvania-Upper Delaware Valley Interstate I II III III III\nNew Jersey Intrastate III IA III I 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 FF—New Jersey"],"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":"ffd538e80009f365199316d40847234f49e032b905e2772d09338193b6c40be5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.1570","next":"us/40-cfr-52.1572"},"notice":"GroundRules: Original legal text. Not legal advice."}