Section 111(d) Plans

Section 111(d) of the Clean Air Act requires states to set emission performance standards for existing sources of designated pollutants (i.e., pollutants for which there is no national ambient air quality standard). Section 111(d) specifically directs that the process for setting such standards be similar to the State Implementation Plan process for criteria pollutants under Section 110. States must adopt plans that establish standards of performance for existing sources and submit the plans to EPA for approval. 

Power Plants

Greenhouse Gas Performance Standards for Existing Electric Generating Units

Affordable Clean Energy (ACE) Rule Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
N/A	N/A	Jan. 19, 2021	U.S. Court of Appeals Vacates and Remands ACE Rule
N/A	N/A	July 8, 2019	Final Federal Affordable Clean Energy (ACE) Rule Guidelines [84 FR 32520]
Oct. 31, 2018	MoDNR Comment Letter on the Proposed Affordable Clean Energy (ACE) Rule	Aug. 31, 2018	Proposed Federal Affordable Clean Energy (ACE) Rule Guidelines [83 FR 44746]

Existing Power Plants

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
July 28, 2023	MoDNR Comment Letter on Section 111(d) Power Plants Rule	May 23, 2023	Proposed Greenhouse Gas Standards for Fossil Fuel-fired Power Plants [88 FR 33240]
Nov. 21, 2022	Non-regulatory Docket Section 111(d) Power Plants Comment Letter	Sept. 8, 2022	Pre-Proposal Public Docket: Greenhouse Gas Regulations for Fossil Fuel-fired Power Plants

Municipal Solid Waste Landfill Emission Guidelines

Municipal Solid Waste Landfill Emissions Guidelines Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
May 4, 2012	Section 111(d) Plan for Municipal Solid Waste Landfills	April 15, 2014	Approval [79 FR 21146]
July 22, 2022	Section 111(d) Plan for Existing Municipal Solid Waste Landfills and State Rules	Pending	Pending

Sewage Sludge Incinerators

Sewage Sludge Incinerators Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
Sept. 18, 2013	Section 111(d) Plan for Sewage Sludge Incinerators	Sept. 16, 2015	Approval [80 FR 55548]

Commercial and Industrial Solid Waste Incinerators

Commercial and Industrial Solid Waste Incinerators Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
Feb. 28, 2014	Section 111(d) Plan for Commercial and Industrial Solid Waste Incinerators	Sept. 18, 2015	Approval [80 FR 56390]

Hospital, Medical and Infectious Waste Incinerators

Hospital, Medical and Infectious Waste Incinerators Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
July 3, 2014	Section 111(d) Plan for Hospital, Medical and Infectious Waste Incinerators, 2014 version	April 24, 2018	Approval [83 FR 17757]
Aug. 8, 2011	Section 111(d) Plan for Hospital, Medical and Infectious Waste Incinerators, 2011 version	April 24, 2018	Approval [83 FR 17757]
July 13, 2001	Section 111(d) Plan for Hospital, Medical and Infectious Waste Incinerators, 2001 version	Oct. 12, 2001	Approval [66 FR 52060]
May 1, 1999	Section 111(d) Plan for Hospital, Medical and Infectious Waste Incinerators, 1999 version	Aug. 19, 1999	Approval [64 FR 45184]

Oil and Gas Sector

Oil and Gas Sector Actions

MoDNR Submittal Date	MoDNR Action/ Document	EPA Date	EPA Action/ Development
Feb. 8, 2023	MoDNR Comment Letter on EPA’s 111(d) Supplemental Proposal for the Oil and Gas Sector	Dec. 6, 2022	Supplemental notice of proposed rulemaking [87 FR 74702]
Jan. 31, 2022	Proposed Oil and Natural Gas Sector Performance Standards and Emissions Guidelines Comment Letter	Nov. 15, 2021	Proposed Rule [86 FR 63110]

Additional Information

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