The TCEQ now offers continuous ambient monitoring data from stations located in all areas of the state.

Select a region from the map below to retrieve a daily summary of hourly data collected at TCEQ's (and other select monitoring entities) continuous ambient monitoring stations. These monitoring stations continuously sample the atmosphere and create an average every five minutes for each parameter monitored. Hourly averages are then calculated from these five-minute averages.

1 - Amarillo 2 - Lubbock 3 - Abilene 4 - Dallas-Fort Worth 5 - Tyler-Longview-Marshall 6 - El Paso-Juarez 7 - Odessa-Midland 8 - San Angelo 9 - Waco 10 - Beaumont-Port Arthur 11 - Austin 12 - Houston-Galveston-Brazoria 13 - San Antonio 14 - Corpus Christi-Victoria 15 - Lower Rio Grande Valley 16 - Laredo

Although this is the most current data, it is not considered official until it has been certified by the TCEQ (or other responsible entity) technical staff. This web page does not present data from all TCEQ continuous ambient monitoring stations prior to June 1998 or from other monitoring entities before January 2000. Data from all TCEQ continuous ambient monitoring stations is available through this web page for dates after June 1998. Only data from monitoring entities that are partnered with the TCEQ is available via this web page. This information is updated hourly.

This web page provides the most current hourly averaged data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour are based on measurements taken from noon to 1:00 p.m. The noon average will not be calculated until after 1:00 p.m. The noon average will then be available on our external server from 1:15 p.m. to 1:30 p.m. This results in an apparent one-hour time lag in the data. We also present our data in Local Standard Time for each measuring site. During Daylight Savings, this introduces another apparent one-hour time lag in the data.