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, March 26, 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	7:00	8:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	28	27	25	23	21	19	19	21	24	28	31	36	39	42	44	46	46	48	46	38	NA	13	2 ^R ^MDL	TCEQ
	17	31	27	25	23	21	19	19	21	22	24	28	33	37	39	42	45	47	47	45	FEW	NA	17	2 ^R ^MDL	TCEQ
	31	32	28	26	23	21	18	19	22	25	27	32	39	45	49	49	48	45	43	41	FEW	NA	31	1 ^R ^MDL	TCEQ
	56	23	26	25	23	20	18	16	20	22	26	31	PMA	PMA	44	46	49	50	49	44	FEW	NA	56	1 ^R ^MDL	TCEQ
	61	29	26	24	21	19	20	20	23	26	29	33	36	41	45	46	46	45	44	40	FEW	NA	61	1 ^R ^MDL	TCEQ
	63	28	27	25	22	20	18	21	22	25	27	31	37	42	44	45	43	42	42	40	FEW	NA	63	1 ^R ^MDL	TCEQ
	69 ¹	28	27	24	21	19	17	18	19	22	25	28	31	32	34	34	35	36	37	36	FEW	NA	69 ¹	1 ^R ^MDL	Other Gov
	70	26	27	26	24	18	18	20	22	24	27	32	36	41	45	48	48	48	46	42	FEW	NA	70	1 ^R ^MDL	TCEQ
	71	30	27	23	20	20	21	22	24	25	28	30	32	34	35	36	37	38	38	36	34	NA	71	1 ^R ^MDL	TCEQ
	73	29	26	25	22	21	20	24	26	29	31	33	PMA	PMA	37	39	41	43	45	48	FEW	NA	73	1 ^R ^MDL	TCEQ
	75 ²	29	27	24	21	19	18	17	20	22	26	29	34	37	40	40	42	45	46	48	47	NA	75 ²	1 ^R ^MDL	TCEQ
	76	33	28	27	25	23	22	21	24	27	PMA	30	32	34	36	39	41	42	44	42	FEW	NA	76	1 ^R ^MDL	TCEQ
	77	26	23	22	20	20	21	19	21	24	28	32	36	38	PMA	46	48	51	52	48	FEW	NA	77	1 ^R ^MDL	TCEQ
	198	32	32	28	23	22	20	20	22	24	26	30	33	35	36	38	40	40	40	38	FEW	NA	198	1 ^R ^MDL	TCEQ
	402 ¹	31	27	24	23	22	22	23	25	27	29	33	38	41	43	42	41	42	41	39	35	NA	402 ¹	1 ^R ^MDL	Other Gov
	1032	24	28	26	23	21	19	16	19	23	PMA	PMA	37	43	49	51	54	54	49	44	FEW	NA	1032	1 ^R ^MDL	TCEQ
	1044	25	24	23	23	24	26	27	27	29	32	34	36	37	39	39	40	41	41	39	FEW	NA	1044	1 ^R ^MDL	TCEQ
	1051	26	25	24	23	23	24	26	26	27	29	33	34	36	37	38	40	41	40	39	FEW	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