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You are here: Home / Small Business and Local Government Assistance / Air Compliance Resources / Assistance Tools for Minor Sources of Nitrogen Oxide

Assistance Tools: Minor Sources of Nitrogen Oxide

Tools and resources for complying with rules for minor sources of nitrogen oxides.

This page provides information to assist owners-operators of facilities who need to comply with air quality rules for controlling the emissions of nitrogen oxides (NOx) from certain combustion sources (referred to as minor sources.)

Note: New information will be added to this page when it becomes available. You can also sign up for email announcements."

These links provide information for complying with the rules for minor sources of NOx in specific nonattainment areas. (Read more about nonattainment areas.)

  • Houston–Galveston–Brazoria Eight-Hour Ozone Nonattainment Area
    Information to help determine the requirements for controlling emissions from certain combustion sources such as boilers, process heaters, stationary engines, and turbines. You can also download sample logs.

    The Houston-Galveston-Brazoria eight-hour ozone nonattainment area comprises Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller Counties. Minor sources in these counties emit or have the potential to emit less than 25 tons per year of NOx. The potential to emit is the total air contaminants emitted if you were to operate 24 hours a day, 365 days per year.

  • Dallas-Fort Worth Eight-Hour Ozone Nonattainment Area
    Information to help determine the requirements for controlling emissions from certain combustion sources such as stationary engines. You can also download sample logs.

    The Dallas-Fort Worth eight-hour ozone nonattainment area comprises Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, and Tarrant Counties. Minor sources in these counties emit or have the potential to emit less than 50 tons per year of NOx. The potential to emit is the total air contaminants emitted if you were to operate 24 hours a day, 365 days per year.

Still Need Help?

Contact the compliance assistance specialist in the TCEQ regional office nearest to you. Or call us toll free at 1-800-447-2827.