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Air Toxics

Air-toxics monitoring data can be used for finding pollution sources, evaluating air-permit applications, and identifying potential health concerns.
Types of Air Toxics monitoring networks

Community Air Toxics Monitoring Network

Canister samples collected throughout the state's urban and industrial areas are collected every 6th day and analyzed using a gas chromatograph-mass spectrometer.

Automated Gas Chromatograph Network

Automated Gas Chromatography samplers (AutoGCs) located throughout the greater Houston, Dallas, El Paso, Corpus Christi, and Odessa areas monitor for VOCs. One 40-minute sample is collected each hour and analyzed automatically on-site.

Carbonyls

Carbonyl samples from the Houston, Dallas-Ft. Worth, and El Paso areas are collected every 6th day and analyzed for carbonyl compounds using high-performance liquid chromatography.

Polyaromatic Hydrocarbons

As part of an U.S. Environmental Protection Agency border grant, the TCEQ monitors polyaromatic hydrocarbon (PAH) concentrations in air at sites along the Texas-Mexico border. Samples are collected every 6th day and analyzed for PAH compounds using a gas chromatograph-mass spectrometer.

Metals

TSP, PM10 and PM2.5 filter samplers monitor for air toxics-metals. Twenty-four-hour samples are collected every sixth or third day.