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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Region	CAMS	Morning												CAMS	POC	Entity
Ozone Hourly Averages for Monday, December 15, 2025. measured in parts per billion
Region	CAMS	Mid	1:00	2:00	3:00	4:00	5:00	6:00	7:00	8:00	9:00	10:00	11:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	5	3	1	1	1	1	1	1	3	14	23	FEW	13	2 ^R ^MDL	TCEQ
	17	14	13	14	13	5	3	3	2	7	15	21	FEW	17	2 ^R ^MDL	TCEQ
	31	24	18	17	14	6	7	8	14	19	26	31	FEW	31	1 ^R ^MDL	TCEQ
	56	21	19	11	3	0	0	0	0	5	16	24	FEW	56	1 ^R ^MDL	TCEQ
	61	1	1	1	1	0	0	0	1	9	20	26	FEW	61	1 ^R ^MDL	TCEQ
	63	21	18	12	8	8	7	6	6	16	22	24	FEW	63	1 ^R ^MDL	TCEQ
	69 ¹	22	18	14	16	14	8	5	23	26	27	28	FEW	69 ¹	1 ^R ^MDL	Other Gov
	70	17	12	15	13	11	6	1	2	6	14	17	FEW	70	1 ^R ^MDL	TCEQ
	71	22	22	20	20	18	16	10	11	22	30	PMA	PMA	71	1 ^R ^MDL	TCEQ
	73	5	5	5	6	5	3	0	1	16	21	22	FEW	73	1 ^R ^MDL	TCEQ
	75 ²	22	19	18	15	7	5	1	2	5	14	21	FEW	75 ²	1 ^R ^MDL	TCEQ
	76	21	21	24	19	16	15	15	15	19	21	24	FEW	76	1 ^R ^MDL	TCEQ
	77	8	7	5	7	4	3	2	2	19	26	29	FEW	77	1 ^R ^MDL	TCEQ
	402 ¹	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	402 ¹	1 ^R ^MDL	Other Gov
	1006	25	22	16	12	14	12	3	2	16	28	29	FEW	1006	1 ^R ^MDL	TCEQ
	1032	23	24	23	20	18	17	12	5	12	23	30	FEW	1032	1 ^R ^MDL	TCEQ
	1044	16	18	19	18	18	7	3	4	16	25	30	FEW	1044	1 ^R ^MDL	TCEQ
	1051	22	24	24	23	22	15	6	8	19	28	32	FEW	1051	1 ^R ^MDL	TCEQ
		Notes: ¹- These sites are maintained and operated by the City of Dallas. ²- These sites are maintained and operated by AECOM for North Texas Commission (NTC). 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.

Texas Commission on Environmental Quality

Ozone Hourly Averages