EPA issued a notice of proposed rulemaking that included corrections, clarifications, additional flexibilities, and adjustment factors to improve the greenhouse gas emissions model (GEM) compliance tool for heavy-duty vehicles while more closely matching the outputs produced by the original GEM version 3.0.

EPA issued a notice of proposed rulemaking that included corrections, clarifications, additional flexibilities, and adjustment factors to improve the greenhouse gas emissions model (GEM) compliance tool for heavy-duty vehicles while more closely matching the outputs produced by the original GEM version 3.0.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA withdrew its August 2019 proposed rule that proposed to determine and correct an error in area designations for the 2010 one-hour sulfur dioxide NAAQS in Freestone and Anderson counties, Rusk and Panola counties, and Titus County, Texas.

EPA proposed to approve Missouri's request to redesignate the Jefferson County 2010 sulfur dioxide one-hour nonattainment area to attainment and its associated maintenance plan for the area.

EPA proposed to approve Missouri's request to redesignate the Jefferson County 2010 sulfur dioxide one-hour nonattainment area to attainment and its associated maintenance plan for the area.