Ozone Alert! Program Data and Monitoring

Ozone Alerts	Exceedances of the 8hr standard	Exceedances of the 1hr standard	Highest 8hr Avg.	4th Highest 8hr Avg.
1991-Present	1999-Present	1991-Present	1999-Present	1994-Present
DEQ Ozone Monitoring Data
Current Ozone Readings	This Month's 8hr Avg Readings	Last Month's 8hr Avg Readings	This Month's 1hr. Avg Readings	Last Month's 1hr Avg Readings

The "Ozone Season" for the Tulsa Area is from May 1st. through the end of September. During those months the weather conditions and hydrocarbon emissions combine in such a way that ground level ozone is formed. You might say it is "cooked." Ground level ozone can reach levels deemed unsafe by the EPA. The Oklahoma Department of Environmental Quality maintains five ozone monitoring stations in the Tulsa area, as indicated on the map below. The measurements from those monitoring stations are used by the E.P.A. to determine if Tulsa County meets the requirements of the Clean Air Act.

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