On December 12, 2018, the commission adopted the Houston-Galveston-Brazoria (HGB) Redesignation Request and Maintenance Plan SIP Revision for the One-Hour and 1997 Eight-Hour OzoneNAAQS (Non-Rule Project No. 2018-026-SIP-NR). The SIP revision includes a request that the United States Environmental Protection Agency redesignate the HGB area to attainment for the one-hour and 1997 eight-hour ozone NAAQS and provides a maintenance plan that will ensure the area remains in
