{"data":{"id":"us/40-cfr-52.1024","jurisdiction":"us","citation":"40 CFR 52.1024","heading":"Attainment dates for national standards.","body":"The following table presents the latest dates by which the national standards are to be attained.\nAttainment Dates Established by Clean Air Act of 1990\nAir quality control region and nonattainment area Pollutant\nSO2 PM-10 NO2 CO O3\nPrimary Secondary\nAQCR 107:\nAndroscoggin County (a) (b) (a) (a) (a) (g)\nKennebec County (a) (b) (a) (a) (a) (g)\nKnox County (a) (b) (a) (a) (a) (g)\nLincoln County (a) (b) (a) (a) (a) (g)\nWaldo County (a) (b) (a) (a) (a) (d)\nOxford Cnty. (Part) See 40 CFR 81.320 (a) (b) (a) (a) (a) (e)\nFranklin Cnty. (Part) See 40 CFR 81.320 (a) (b) (a) (a) (a) (e)\nSomerset Cnty. (Part) See 40 CFR 81.320 (a) (b) (a) (a) (a) (e)\nAQCR 108:\nAroostook Cnty. (Part) See 40 CFR 81.320 (a) (b) (c) (a) (a) (a)\nRemainder of AQCR (a) (b) (a) (a) (a) (a)\nAQCR 109:\nHancock County (a) (b) (a) (a) (a) (d)\nMillinocket (e) (e) (a) (a) (a) (a)\nRemainder of AQCR (a) (b) (a) (a) (a) (a)\nAQCR 110:\nYork County (a) (b) (a) (a) (a) (g)\nCumberland County (a) (b) (a) (a) (a) (g)\nSagadahoc County (a) (b) (a) (a) (a) (g)\nOxford Cnty. (Part) See 40 CFR 81.320 (a) (b) (a) (a) (a) (e)\nAQCR 111 (a) (b) (a) (a) (a) (a)\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 12/31/94.\nd 11/15/94 (one-year extension granted).\ne 11/15/95.\ng 11/15/96.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS","Subpart U—Maine"],"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":"4b674b28773760b3c3c5afb412f372b340594cfebb6dbe639c2a80f0197de542","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-52.1023","next":"us/40-cfr-52.1025"},"notice":"GroundRules: Original legal text. Not legal advice."}