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Texas NonAttainment Areas
(from Texas Department of Transportation Open Data)
on August 19, 2016.
updated over 1 year ago.
This layer contains the nonattainment and near nonattainment areas (counties) in Texas. It was derived from TIGER data, and it precisely matches the Texas Outline, Texas Counties and the TCEQ Service Regions layers. Nonattainment is an area that has not achieved compliance with the National Ambient Air Quality Standards (NAAQS). These nonattainment counties were designated by the U.S. Environmental Protection Agency (EPA). They are designated based on their air quality monitoring data. Near nonattainment means an area is very close to falling into non compliance with the NAAQS. These counties have been designated by the TCEQ Office of Policy and Regulatory Development for planning reasons. These counties either have an ozone monitor or are part of a metropolitan statistical area (MSA) that has an ozone monitor. It is very uncertain at this point which near nonattainment counties, if any, will ultimately be designated by the EPA as nonattainment. There are 16 ozone nonattainment areas: 8 counties in the Houston/ Galveston area (Montgomery, Liberty, Waller, Harris, Chambers, Fort Bend, Brazoria, Galveston); 3 in the Beaumont/Port Arthur area(Hardin, Orange, Jefferson); 4 in the Dallas/Fort Worth area (Denton, Tarrant, Dallas, Collin); and 1 in El Paso (El Paso). There are 25 ozone near nonattainment counties: 1 in the Victoria area (Victoria); 2 in the Corpus Christi area (San Patricio, Nueces); 9 in the San Antonio/Austin area (Williamson, Travis, Bastrop, Hays, Caldwell, Comal, Bexar, Guadalupe, Wilson); and 5 in the Tyler/Longview area (Upshur, Harrison, Smith, Gregg, Rusk), and 8 in the Dallas/Fort Worth area (Johnson, Ellis, Kaufman, Parker, Rockwall, Hunt, Hood, Henderson).