Air Quality

Air Quality Graphic

Ozone has been Houston's main air quality concern for several years. Area climate conditions combined with the variety of emissions from area industry and transportation make the city a prime media for ground level ozone formation.

The Houston-Galveston area (HGA) is classified as a severe nonattainment area for ozone. The counties that comprise the HGA ozone nonattainment area are Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller. The Texas Commission on Environmental Quality is responsible for submitting a State Implemented Plan (SIP) to the federal Environmental Protection Agency (EPA) as a plan of action to achieve ozone attainment.

Unfortunately, ozone is not the only air quality concern in Houston. However, the city is committed to identifying air quality issues and targeting solutions for the improvement of the environment. The City supported research to identify air toxics and the related impact on human health. Conclusions drawn from research have led the City to taking action to reduce these toxics. Over the past year from 2005 - 2006 the level of 1,3 butadiene in ambient air has been measurably reduced at three-hotspot location monitors.

The Texas Commission on Environmental Quality (TCEQ) issues daily air quality advisories, you may also register for daily ozone alerts. You can also "compare you air" at For access to air pollution data, go to

For air toxics such as benzene the city encourages Houstonians to do their part in helping improve the air quality. For more information about what you can do to help improve our air quality, visit the " What You Can Do" section of our web site

The Bureau of Pollution Control and Prevention (BPCP) is a bureau within the Environmental Health Division (EHD) of the Houston Department of Health and Human Services (HDHHS) of the City of Houston. The BPCP was previously the Bureau of Air Quality Control (BAQC), and underwent organization changes integrating several environmental programs from the former Bureau of Water Resources Protection. Examples of the work performed by the bureau include:

  • Investigation and enforcement of air, water, and hazardous waste suspect activities – includes landfills, abandoned barrels, illegal dumping other than special or medical waste, soil contamination and chemical discharges;
  • Review and comment on permitting, rule-making, and legislative state and federal actions advocating for best and reasonable public health protection;
  • Monitoring of outdoor ambient air and water throughout Houston at 10 fixed air monitoring sites, mobile air monitoring, and 133 water sampling sites.

Health Effects

Health Effects Graphic

Protecting the health of Houstonians from environmental pollutants and other health risks has always been a key goal of the City of Houston. The City has taken a number of actions to fulfill this goal, including establishing standards for pollutants in the environment, requiring sources to limit their pollution, and educating members of the public about actions they can take to protect their health.

Air quality is of particular concern because it also directly affects the health and safety of the citizens of Houston. As a result, the City of Houston has commissioned a scientific study of air pollutants in the Houston area. The results of the scientific commission report identified 12 pollutants as definite health risks to Houstonians. This report will now guide the city in deployment of air quality resources and will support the development of a regional benzene reduction plan, which, through the leadership of the City of Houston, other jurisdictions will be encouraged to adopt.

Environmental Health