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 Sunday, March 29, 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	9:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	4	3	3	1	5	8	10	11	27	40	45	49	50	52	54	55	55	54	51	47	FEW	NA	13	2 ^R ^MDL	TCEQ
	17	20	19	17	18	20	20	22	24	27	36	44	48	50	50	51	53	55	54	51	46	FEW	NA	17	2 ^R ^MDL	TCEQ
	31	25	26	25	29	28	26	24	29	34	38	44	52	56	58	58	57	56	54	52	49	FEW	NA	31	1 ^R ^MDL	TCEQ
	56	9	8	8	11	13	8	11	16	28	40	47	52	54	54	55	57	58	58	53	50	FEW	NA	56	1 ^R ^MDL	TCEQ
	61	21	15	17	16	19	17	11	21	31	38	47	50	54	55	54	54	52	52	49	45	42	NA	61	1 ^R ^MDL	TCEQ
	63	19	20	22	23	23	19	16	22	29	33	44	51	54	55	56	54	53	52	51	47	48	NA	63	1 ^R ^MDL	TCEQ
	69 ¹	26	27	26	27	28	28	27	27	30	34	40	45	48	50	51	50	51	50	48	43	FEW	NA	69 ¹	1 ^R ^MDL	Other Gov
	70	15	20	23	23	21	19	17	17	23	37	44	50	51	54	56	56	54	51	49	38	28	NA	70	1 ^R ^MDL	TCEQ
	71	29	29	27	27	25	25	22	24	30	36	45	49	54	57	58	57	55	52	50	47	FEW	NA	71	1 ^R ^MDL	TCEQ
	73	23	23	20	21	21	17	18	22	33	43	45	47	48	48	50	50	51	53	52	48	46	NA	73	1 ^R ^MDL	TCEQ
	75 ²	16	14	11	10	12	11	16	22	31	41	49	51	53	54	56	57	58	60	57	54	FEW	NA	75 ²	1 ^R ^MDL	TCEQ
	76	27	31	31	29	27	28	28	29	34	37	43	44	45	47	49	50	51	52	51	48	FEW	NA	76	1 ^R ^MDL	TCEQ
	77	24	24	23	24	22	19	21	23	28	41	47	50	52	54	55	55	54	53	52	48	44	NA	77	1 ^R ^MDL	TCEQ
	198	30	26	27	26	24	22	21	21	30	37	44	48	50	52	56	58	57	56	52	48	45	NA	198	1 ^R ^MDL	TCEQ
	402 ¹	23	27	26	24	19	16	15	20	30	40	47	52	54	55	53	53	52	52	51	47	43	NA	402 ¹	1 ^R ^MDL	Other Gov
	1032	24	24	21	22	23	23	23	25	30	36	42	51	57	58	60	62	60	57	54	50	46	NA	1032	1 ^R ^MDL	TCEQ
	1044	24	17	12	14	11	8	6	17	30	45	52	53	54	52	52	52	53	55	51	47	FEW	NA	1044	1 ^R ^MDL	TCEQ
	1051	29	29	29	28	25	24	23	22	29	40	52	58	59	60	58	56	55	53	50	47	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