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Texas Emission Sources - A Graphical Representation

The following pie charts show the relative emissions of nitrogen oxide (NOx) and volatile organic compounds (VOCs) for Texas and its urban areas. These pollutants are the primary contributors to ozone formation.
NOx Emissions VOC Emissions
Statewide
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 23%, mobile source are 52%, point sources are 25%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 84%, mobile source are 11%, point sources are 5%.
Beaumont-Port Arthur
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 4%, mobile source are 34%, point sources are 62%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 52%, mobile source are 10%, point sources are 38%.
Dallas-Fort Worth
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 4%, mobile source are 34%, point sources are 62%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 52%, mobile source are 10%, point sources are 38%.
El Paso
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 4%, mobile source are 34%, point sources are 62%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 52%, mobile source are 10%, point sources are 38%.
Houston Galveston Brazoria
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 4%, mobile source are 34%, point sources are 62%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 52%, mobile source are 10%, point sources are 38%.
San Antonio
Pie chart showing NOx emission sources for the Texas.  Area source emissions are 4%, mobile source are 34%, point sources are 62%.  Pie chart showing emission sources for the Beaumonth area.  Area source emissions are 52%, mobile source are 10%, point sources are 38%.

In many urban areas of the state, mobile sources are responsible for anywhere from 50% to 80% of the NOx emissions that contribute to ozone. States have limited authority to regulate mobile source. However, Texas has implemented many successful voluntary programs that have contributed to fewer mobile emissions and overall success in success in improving air quality:

*Area and mobile emissions data are developed triennially at the county level by the TCEQ and typically posted 15 months following the reporting year.