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BPA: Latest Ozone Planning Activities

Latest events and activities related to the Beaumont–Port Arthur area’s compliance with the National Ambient Air Quality Standards for ground-level ozone.

BPA Attainment Area On-Road Mobile Source Emissions Inventory and MVEB Update SIP Revision

On February 4, 2013, the U.S. EPA published its final approval of a revision to the State Implementation Plan for air quality, called the BPA Attainment Area On-Road Mobile Source Emissions Inventory and Motor Vehicle Emissions Budget Update, which became effective March 6, 2013. This SIP revision replaced the on-road mobile-source emissions inventories that were adopted in 2008 as part of the BPA maintenance plan for the 1997 eight-hour ozone standard, based on the EPA’s MOBILE model, with emissions inventories based on the EPA's Motor Vehicle Emission Simulator (MOVES) model. Updates to on-road mobile source emissions inventories included those for 2005, 2011, 2014, 2017, and 2021. In addition, 2021 MVEPs for nitrogen oxides and volatile organic compounds were updated, based on the MOVES-based emissions inventories.

Redesignation to Attainment for the 1997 Eight-Hour Ozone Standard

On December 10, 2008, the commission approved an Eight-Hour Ozone Redesignation Request and Maintenance Plan SIP Revision for the BPA ozone nonattainment area. The SIP revision requested that the EPA redesignate the BPA area to attainment of the 1997 eight-hour ozone National Ambient Air Quality Standard and demonstrated how the area would maintain compliance with the standard through 2021.

On October 20, 2010, the EPA published a final rule in the Federal Register (75 FR 64675) Exit the TCEQ, effective November 19, 2010, approving the redesignation request and maintenance plan and finalizing a determination that the BPA area is in attainment of the revoked one-hour ozone standard. The EPA’s determination to redesignate signifies that the BPA area has met all of the applicable Federal Clean Air Act requirements for the purpose of redesignation to attainment.

With redesignation to attainment of the 1997 eight-hour ozone standard and a determination of attainment for the one-hour ozone standard, no new ozone-reduction strategies will have to be developed for either standard as long as the area continues to monitor ozone levels below the 1997 eight-hour standard; however, current strategies to reduce ozone in the BPA area will remain in place.