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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Region	CAMS	Morning												Afternoon							CAMS	POC	Entity
Ozone Hourly Averages for Thursday, February 19, 2026. 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	Noon	1:00	2:00	3:00	4:00	5:00	6:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	30	28	28	25	24	21	16	14	15	23	36	41	43	43	44	46	46	45	NA	13	2 ^R ^MDL	TCEQ
	17	27	27	27	26	22	18	15	11	13	24	34	40	42	44	44	46	47	46	NA	17	2 ^R ^MDL	TCEQ
	31	30	31	31	28	26	24	23	19	17	20	33	42	45	46	47	49	49	48	NA	31	1 ^R ^MDL	TCEQ
	56	25	23	28	24	22	21	18	14	13	25	40	43	46	PMA	49	50	49	44	NA	56	1 ^R ^MDL	TCEQ
	61	25	25	23	22	24	19	14	11	12	20	30	41	44	46	47	48	47	45	NA	61	1 ^R ^MDL	TCEQ
	63	29	29	27	25	23	20	16	14	13	16	30	40	43	44	46	45	46	45	NA	63	1 ^R ^MDL	TCEQ
	69 ¹	27	27	26	23	21	18	15	13	14	15	25	37	43	45	46	46	45	44	NA	69 ¹	1 ^R ^MDL	Other Gov
	70	27	26	26	24	25	21	15	11	14	21	32	40	43	45	45	46	47	47	NA	70	1 ^R ^MDL	TCEQ
	71	29	28	25	21	25	26	25	23	24	29	36	39	40	45	49	54	56	52	NA	71	1 ^R ^MDL	TCEQ
	73	29	28	27	22	18	14	6	1	15	21	33	40	43	43	44	45	45	45	NA	73	1 ^R ^MDL	TCEQ
	75 ²	31	30	29	27	25	21	18	19	19	29	38	44	46	47	49	50	50	49	NA	75 ²	1 ^R ^MDL	TCEQ
	76	32	29	26	23	20	19	22	23	21	27	36	41	43	44	45	46	46	45	NA	76	1 ^R ^MDL	TCEQ
	77	25	26	23	21	15	12	10	7	11	PMA	24	34	39	41	43	44	44	44	NA	77	1 ^R ^MDL	TCEQ
	402 ¹	32	29	27	27	25	20	18	14	20	26	29	37	44	47	49	48	48	47	NA	402 ¹	1 ^R ^MDL	Other Gov
	1006	28	27	24	22	24	24	24	20	22	23	28	40	44	47	49	50	50	48	NA	1006	1 ^R ^MDL	TCEQ
	1032	25	27	25	25	26	24	23	22	22	26	PMA	44	49	50	52	51	51	50	NA	1032	1 ^R ^MDL	TCEQ
	1044	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	NA	1044	1 ^R ^MDL	TCEQ
	1051	25	24	22	24	26	27	24	19	19	28	35	41	46	48	49	51	50	45	NA	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