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Ozone Hourly Averages

Ozone is a form of oxygen with three atoms instead of the usual two atoms. It is a photochemical oxidant and, at ground level, is the main component of smog. Unlike other gaseous pollutants, ozone is not emitted directly into the atmosphere. Instead, it is created in the atmosphere by the action of sunlight on volatile organic compounds and nitrogen oxides.

In Texas, higher levels of ozone usually occur on sunny days with light winds, primarily from March through October. An ozone exceedance day is counted if the measured eight-hour average ozone concentration exceeds the standards.

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Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
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Ozone Hourly Averages for Sunday, March 1, 2026.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
Austin - all times are in CST
3 3032323130292826263134 FEW 3 2 R MDL TCEQ
38 2831313028282928303034 FEW 38 1 R MDL TCEQ
614  1 QAS272524242426242525 FEW NA 614  1 1 N MDL Other Gov
690  1 QAS303131292828292830 FEW NA 690  1 1 N MDL Other Gov
1604  1 22212019191717161721 FEW NA 1604  1 1 N MDL Other Gov
1612  2 27262526272626252628 FEW NA 1612  2 1 N MDL Other Gov
1613  2 25232222222524222125 FEW NA 1613  2 1 N MDL Other Gov
1619  3 QAS373735353534323336 FEW NA 1619  3 1 N MDL Other Gov
1620  3 QAS283029282727252527 FEW NA 1620  3 1 N MDL Other Gov
1630  4 QAS282726252626232529 FEW NA 1630  4 1 N MDL Other Gov
1675  1 QAS282524302725212228 FEW NA 1675  1 1 N MDL Other Gov
Notes:
1 - These sites are maintained and operated by Dios Dado for the Capital Area Council of Governments.
2 - These sites are maintained and operated by Weston Solutions for the Capital Area Council of Governments.
3 - These sites are maintained and operated by Weston Solutions for CAPCOG.
4 - These sites are maintained and operated by Weston Solutions, Inc. for CAPCOG.

TCEQ does not certify the validity or quality of data it hosts from other monitoring entities.
Maximum values for the day are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

PLEASE NOTE:  This data has not been verified by the TCEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TCEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.