CFR›Title 40›Chapter I›Part 51›40 CFR Part 51 Subpart Q Citation40 CFR Part 51 Subpart QContainsSubject groups Air Quality Data Reporting–Source Emissions and State Action ReportingCorpusDaily eCFRDisplayed edition2026-09-18Last updated2026-09-18 Subpart Q—Reports Subject Groups Air Quality Data Reporting Air Quality Data Reporting Source Emissions and State Action Reporting Source Emissions and State Action Reporting AuthoritySecs. 110, 301(a), 313, 319, Clean Air Act (42 U.S.C. 7410, 7601(a), 7613, 7619).Source44 FR 27569, May 10, 1979, unless otherwise noted.