40 CFR Part 52
10 final rules will amend 40 CFR Part 52 between November 2026 and November 2026
Every final rule amending 40 CFR Part 52, Approval and Promulgation of Implementation Plans, recorded by effective date across 1 months and 1 agency. Rules whose date has passed are kept: they are what the part now says.
Final rules amending this part, November 2026 onward.
Carrying an effective date that has not arrived.
Promulgating bodies that have amended it.
What this part is
40 CFR Part 52: Approval and Promulgation of Implementation Plans
The most recent change to this part takes effect 24 November 2026: Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS. The source describes it as revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (DAQ), on February 20, 2025.
Approval and Promulgation of Implementation Plans sits in Title 40 of the Code of Federal Regulations, Protection of Environment. Over the 1 month in this record it will be amended by 10 final rules, roughly 10 a month. Every one of them came from the Environmental Protection Agency. 10 carry an effective date that has not arrived yet.
Part heading read from the eCFR Versioner API as of 30 August 2026. Amendment counts are this property's own join of the Federal Register against that heading; the two sources do not publish it together.
The records
Every rule amending this part
Oldest first, by the day each rule took effect. Rules whose date has passed are kept: they are what the part now says. A red margin rule marks a rule binding today; a faint rule marks one binding within 30 days.
-
001
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
Prior state revisions to the Missouri State Implementation Plan (SIP) related to Control of Nitrogen Oxide (NO<INF>X</INF>) Emissions From Large Stationary Internal Combustion Engines.
in 5 days Federal Register → -
002
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area
Prior state Not stated in the source document.
in 5 days Federal Register → -
003
Air Plan Approval; Missouri; Construction Permit Exemptions
Prior state revisions to the Missouri State Implementation Plan (SIP) received on February 10, 2026.
in 12 days Federal Register → -
004
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors
Prior state revisions submitted by the State of Maryland.
in 12 days Federal Register → -
005
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
Prior state revision submitted by the State of Georgia through the Georgia Environmental Protection Division (EPD) on June 27, 2024.
in 12 days Federal Register → -
006
Approval and Promulgation of State Implementation Plans; New Jersey; RACT Certifications for the 2008 and 2015 Ozone National Ambient Air Quality Standards
Prior state revision submitted by the State of New Jersey for purposes of certifying and meeting the requirements for Reasonably Available Control Technology (RACT) for the Serious classification of the 2008 and the Moderate classification of the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS).
in 12 days Federal Register → -
007
Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS
Prior state Not stated in the source document.
in 12 days Federal Register → -
008
Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
Prior state revision submitted by the Commonwealth of Kentucky through the Energy and Environment Cabinet (Cabinet) on behalf of the Louisville Metro Air Pollution Control District (District) via a letter dated June 3, 2024.
in 12 days Federal Register → -
009
Approval and Promulgation of Implementation Plans; Arizona; Revisions to the Cleaner Burning Gasoline, Winter Oxygenated Fuel, and Gasoline Set-Aside Programs
Prior state revision to the Arizona State Implementation Plan (SIP) submitted by the Arizona Department of Environmental Quality (ADEQ).
in 21 days Federal Register → -
010
Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
Prior state revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (DAQ), on February 20, 2025.
in 27 days Federal Register →
Cite this view
Every final rule amending 40 CFR Part 52, Approval and Promulgation of Implementation Plans, recorded by effective date across 1 months and 1 agency. Rules whose date has passed are kept: they are what the part now says. Figures read 28 October 2026. Cite the read date with the figure: the window moves as rules are published and amended.
40 CFR Part 52: Approval and Promulgation of Implementation Plans. Luminory federal effective-date record, 10 records, read 28 October 2026. https://luminory.org/cfr/40-52/Luminory. (2026). 40 CFR Part 52: Approval and Promulgation of Implementation Plans [Data set]. Derived from the U.S. Federal Register API. https://luminory.org/cfr/40-52/All citation formats · How this is derived · Raw data (CC BY 4.0)