Greenhouse gases

Air Plan Conditional Approval; Colorado; Revisions to Regulation Number 7 and Oil and Natural Gas RACT Requirements for 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

The Environmental Protection Agency (EPA) is conditionally approving portions of State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 14, 2018 and May 13, 2020.

Publication Date: 
Friday, May 13, 2022 - 4:00am

Air Plan Approval; South Dakota; Revisions to South Dakota Codified Law and Administrative Rules of South Dakota

With this direct final rule, the Environmental Protection Agency (EPA or the ``Agency'') is promulgating approval of South Dakota's submittal requesting that EPA recognize the merger of South Dakota's Department of Agriculture (DOA) with the Department of Environment and Natural Resources (DENR) to form the new Department of Agriculture and Natural Resources (DANR) and incorporate corresponding non-substantive revisions to the South Dakota Codified Law (SDCL) and the Administrative Rules of South Dakota (ARSD) into South Dakota's Implementation Plan.

Publication Date: 
Monday, April 11, 2022 - 4:00am

Approval and Promulgation of Implementation Plans; South Dakota; Revisions to South Dakota Codified Law and Administrative Rules of South Dakota

The Environmental Protection Agency (EPA or the ``Agency'') is proposing approval of South Dakota's submittal requesting that EPA recognize the merger of South Dakota's Department of Agriculture (DOA) with the Department of Environment and Natural Resources (DENR) to form the new Department of Agriculture and Natural Resources (DANR) and incorporate corresponding non-substantive revisions to the South Dakota Codified Law (SDCL) and the Administrative Rules of South Dakota (ARSD) into South Dakota's State Implementation Plan.

Publication Date: 
Monday, April 11, 2022 - 4:00am

Control of Air Pollution From New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards

The Environmental Protection Agency (EPA) is proposing a rule that would reduce air pollution from highway heavy-duty vehicles and engines, including ozone, particulate matter, and greenhouse gases. This proposal would change the heavy-duty emission control program-- including the standards, test procedures, useful life, warranty, and other requirements--to further reduce the air quality impacts of heavy- duty engines across a range of operating conditions and over a longer period of the operational life of heavy-duty engines.

Publication Date: 
Monday, March 28, 2022 - 4:00am

Air Plan Approval; CO; Reg 3 NSR and APEN Updates

The Environmental Protection Agency (EPA) is proposing to approve state implementation plan (SIP) revisions submitted by the State of Colorado on May 13, 2020. The revisions contain amendments to the State's New Source Review (NSR) permitting program and Air Pollution Emission Notices (APENs). The EPA is taking this action pursuant to the Clean Air Act (CAA).

Publication Date: 
Wednesday, March 23, 2022 - 4:00am

Air Plan Approval; Montana; Thompson Falls PM10

The Environmental Protection Agency (EPA) is proposing to fully approve the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on November 4, 2021, for the Thompson Falls Moderate nonattainment area (NAA) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>) and concurrently redesignate the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Tuesday, March 8, 2022 - 4:00am

Air Plan Approval; Montana; Whitefish PM10

The Environmental Protection Agency (EPA) is proposing to fully approve the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on August 6, 2021, for the Whitefish Moderate nonattainment area (NAA) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>) and concurrently redesignate the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Tuesday, March 8, 2022 - 4:00am

Disapproval of Air Quality Implementation Plans; Wyoming; Proposed Revisions to Regional Haze State Implementation Plan

The Environmental Protection Agency (EPA) is proposing to disapprove a State Implementation Plan (SIP) revision submitted by the State of Wyoming on May 14, 2020, and supplemented in September and October 2020, addressing regional haze (``Wyoming's 2020 SIP revision'').

Publication Date: 
Tuesday, January 18, 2022 - 4:00am

Approval and Promulgation of Implementation Plans; Colorado; Revisions to Regulation Number 7; Aerospace, Oil and Gas, and Other RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

Subject to certain exceptions, the Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 14, 2018, May 8, 2019, May 13, 2020 and March 22, 2021. The revisions are to Colorado Air Quality Control Commission (Commission or AQCC) Regulation Number 7 (Reg. 7). The revisions to Reg.

Publication Date: 
Friday, November 5, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; North Dakota; Revisions To Permitting Regulations Unrelated to Regional Haze; Correction

The Environmental Protection Agency (EPA) published a proposed rule in the Federal Register on August 2, 2021. The revisions contain amendments to the State of North Dakota's Air Pollution Control Regulations and to the State's Legal Authority. The August 2, 2021 published rule had the incorrect docket number. This published rule corrects the docket number for the August 2, 2021 rulemaking.

Publication Date: 
Friday, September 3, 2021 - 4:00am

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