{"data":{"id":"us/40-cfr-52.374","jurisdiction":"us","citation":"40 CFR 52.374","heading":"Attainment dates for national standards.","body":"The following table presents the latest dates by which the national standards are to be attained. The dates reflect the information presented in Connecticut's plan.\nAir quality control region Pollutant\nSO2 PM10 NO2 CO O3\nPrimary Secondary\nAQCR 41: Eastern Connecticut Intrastate (See 40 CFR 81.183) (a) (b) (a) (a) (a) (d)\nAQCR 42: Hartford-New Haven-Springfield Interstate Area (See 40 CFR 81.26)\nAll portions except City of New Haven (a) (b) (a) (a) (a) (d)\nCity of New Haven (a) (b) (c) (a) (a) (d)\nAQCR 43: New Jersey-New York-Connecticut Interstate Area (See 40 CFR 81.13) (a) (a) (a) (a) (a) (d)\nAQCR 44: Northwestern Connecticut Intrastate (See 40 CFR 81.184) (a) (b) (a) (a) (a) (d)\na. Air quality levels presently below primary standards or area is unclassifiable.\nb. Air quality levels presently below secondary standards or area is unclassifiable.\nc. December 31, 1996 (two 1-year extensions granted).\nd. November 15, 2007.","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":"bee82e70f0dd4bba3a022f9f2ee8712e1269ce424c6be5b198beb30a9cc7a48a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.373","next":"us/40-cfr-52.375"},"notice":"GroundRules: Original legal text. Not legal advice."}