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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.

Use the controls below to select a different date or parameter. Click on the Generate Report button once you have made your selections.

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 Friday, June 14, 2024.
measured in parts per billion
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
Austin - all times are in CST
3 38322622191615 NA 3 2 R MDL TCEQ
38 32251611879 NA 38 1 R MDL TCEQ
614  1 3936312216138 FEW 614  1 1 N MDL Other Gov
690  1 2427251712105 FEW 690  1 1 N MDL Other Gov
1604  1 3124201513106 FEW 1604  1 1 N MDL Other Gov
1612  2 292416141020 FEW 1612  2 1 N MDL TCEQ
1613  2 36333227262216 FEW 1613  2 1 N MDL TCEQ
1619  3 2423232117129 FEW 1619  3 1 N MDL Other Gov
1620  3 131724151052 FEW 1620  3 1 N MDL Other Gov
1629  4 3031252215127 FEW 1629  4 1 N MDL Other Gov
1630  4 292519151096 FEW 1630  4 1 N MDL Other Gov
1675  1 22171411643 FEW 1675  1 1 N MDL Other Gov
- These sites are maintained and operated by Dios Dado for the Capital Area Council of Governments.
- These sites are maintained and operated by Weston Solutions, Inc. for the Capital Area Council of Governments.
- These sites are maintained and operated by Weston Solutions for CAPCOG.
- 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.