EPA promulgated new greenhouse gas emissions standards for model year (MY) 2032 and later heavy-duty highway vehicles that phase in starting as early MY 2027 for certain vehicle categories, updated discrete elements of the Averaging Banking and Trading program, and added warranty requirements for batteries and other components of zero emission vehicles. 

EPA announced the availability of data on emission allowance allocations to certain units under the Cross-State Air Pollution Rule trading programs. 

SIP Approval: California (revisions to nonattainment new source review requirements for the 2015 ozone NAAQS in the Feather River Air Quality Management District).