The Results are in
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Monday, November 14, 2022


The Environmental Protection Agency (EPA) has reclassified the air quality for the Bexar County ozone nonattainment area from “Marginal” to “Moderate” nonattainment, effective November 7, 2022.

In response to this new designation, AAMPO has updated its Transportation Conformity Document to meet EPA requirements. AAMPO will host a public meeting tomorrow Tuesday, November 15, 2022 at 6 p.m. at TxDOT San Antonio District Headquarters, Building 2 Training Room, located at 4615 NW Loop 410, 78229. A presentation will be followed by an opportunity for public comment.

The public comment period is open through December 1, 2022. Please visit to view the draft document and submit comments online. Comments may also be submitted via email to Clifton Hall at, or by mail to AAMPO, 825 South Saint Mary’s Street, San Antonio, TX 78205.

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A Transportation Conformity Public meeting is scheduled for tomorrow, November 15, 2022.

Public comment will also be accepted at the December 2, 2022 AAMPO Technical Advisory Committee meeting and the December 12, 2022 AAMPO Transportation Policy Board meeting. For more information on these meetings, please see article below, Upcoming AAMPO Meetings.


Bexar County has a new air quality status as of November 7, 2022. The US Environmental Protection Agency (EPA) has downgraded the region’s ozone nonattainment designation from Marginal to Moderate. AAMPO updated the Transportation Conformity Document to meet requirements of this new status. But what does this mean for the air we breathe in Bexar County? Will it get worse before it gets better?

Ozone Levels in Bexar County

Ozone, commonly called smog, is the only pollutant in Bexar County that exceeds EPA standards. This and other pollutants and substances, such as pollen, can still affect residents sensitive to diminished air quality. Despite the new designation, peak ozone levels have been steady since 2016, and have reduced by 9% since 2012. Also, no severe exceedance days, where ozone levels are 20% or more above the standard, have been recorded since 2018—which was the year Bexar County was first designated as nonattainment.
The source of ozone is a complex topic. Ozone is formed when sunlight interacts with precursor pollutants, nitrous oxides (NOx) and volatile organic compounds (VOCs). Most ozone in the region—about 80%—is “background ozone” which is formed in other parts of Texas, or even other states and countries. Ozone formed within the region is mainly from non-transportation sources such as industrial plants and dry cleaners. In fact, of the ozone produced in Bexar County, 30% is from cars, trucks, and vans, or 5% of total ozone when impacts from other sources/areas are considered. AAMPO’s focus is on this 5%, a small amount with a significant impact on meeting air quality goals.

Future Emissions Projections

To play our role in meeting EPA requirements, AAMPO uses computer simulations to project traffic patterns and resulting emissions. AAMPO must show emissions will be below pre-nonattainment 2017 levels and less than the emissions if no new transportation projects are introduced until 2050—the horizon year of the long-range transportation plan. The model has shown a drastic decrease in ozone precursors since 2018, and despite planning for a transportation network to support nearly twice our current population, the precursor levels are projected to stay roughly the same between 2025 and 2050.

Air Quality Improvements

AAMPO was able to meet EPA testing requirements through the use of our Congestion Mitigation and Air Quality program (CMAQ). CMAQ is a special federal grant program for nonattainment areas to implement projects that reduce pollutants and congestion. These projects will reduce emissions by several tons per year. Another factor is more strict emissions standards for new cars. As older vehicles stop working, they are replaced by newer and cleaner vehicles. Despite a rapidly growing region, AAMPO is working with local, state, and federal partners to ensure air quality is improved.


AAMPO is still seeking an experienced Regional Transportation Planner who will lead or support a range of federal, state, regional, and local environmental and transportation programs, projects, and studies for the organization.

Resumes will be accepted until the position is filled. Visit our website to view job posting and how to apply.

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AAMPO is hiring a Regional Transportation Planner- apply today!


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The Alamo Area MPO has three regular meetings that occur each month. All AAMPO meetings are open to the public and all meeting agendas are posted on our website,

The next Technical Advisory Committee meeting will be held online and in person on Friday, December 2, 2022 at 1:30 p.m. Access the meeting here or at the TxDOT District Office in the Building 2 Hearing Room, 4615 NW Loop 410, San Antonio, Texas 78229.

The next Transportation Policy Board will be held online and in person on Monday, December 12, 2022 at 1:30 p.m. at the VIA Metro Center Community Room at 1021 San Pedro Avenue, San Antonio, TX 78212. As a reminder, you can watch meetings of the Transportation Policy Board live online at The video is posted and available for viewing the day after the meeting concludes.

The next Active Transportation Advisory Committee meeting will be held online and in person on Wednesday, January 11, 2023 at 3:00 p.m. Access the meeting here or at the AAMPO office at 825 South Saint Mary's Street, San Antonio, Texas 78205.

All meetings are archived and available on the website at the respective webpage location noted above.

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