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Current Ozone Levels

The map below shows the current highest ozone levels in each of the metropolitan areas across Texas where ozone is measured by the TCEQ. More detailed maps showing the current ozone levels measured at each site in a particular metropolitan area are available by clicking on the boxes below. These levels are based on data measured at the TCEQ's continuous air monitoring stations and includes data from local governments and private monitoring networks.

The latest image available is for Wednesday November 25, 2015 02-03:00 CST. If the image below is older than this, you will need to force your browser to reload this page by clicking on the browser "Reload" or "Refresh" button.

Map showing current Ozone levels in Texas.

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 beginning 1/1/2013, 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.