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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 Thursday, March 23, 2023.
measured in parts per billion
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00
Beaumont-Port Arthur - all times are in CST
2 3030313130282728272828282828262424 FEW NA 2 2 R MDL TCEQ
9 3334323127222517222929292929282620 FEW NA 9 2 R MDL TCEQ
28 292826242221232627272728272625242119 NA 28 1 R MDL TCEQ
64 312929272727262525272828292826242323 NA 64 1 R MDL TCEQ
640  1 3133323130292929292929292928272926 FEW NA 640  1 1 R MDL Private
643  1 2623262523212326252526262525242322 FEW NA 643  1 1 R MDL Private
1035 3332282727252528303030302929272625 FEW NA 1035 1 R MDL TCEQ
- These sites are maintained and operated by AECOM for South East Texas Regional Planning Commission.

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.

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.