{"data":{"id":"us/40-cfr-52.371","jurisdiction":"us","citation":"40 CFR 52.371","heading":"Classification of regions.","body":"The Connecticut plan was evaluated on the basis of the following classifications:\nAir quality control region Pollutant\nParticulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone\nNew Jersey-New York-Connecticut Interstate I I I I I\nHartford-New Haven-Springfield Interstate I I III I I\nNorthwestern Intrastate III III III III III\nEastern 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 H—Connecticut"],"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":"8871492ac31bef39d4451f56afa8756dd4aa1f839bb42075981edab3cd99b7b6","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.370","next":"us/40-cfr-52.372"},"notice":"GroundRules: Original legal text. Not legal advice."}