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, April 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	7:00	8:00	9:00	10:00	CAMS	POC	Entity
Dallas-Fort Worth - all times are in CST
	13	8	4	1	0	0	0	2	9	31	39	39	45	50	54	56	55	54	50	43	31	18	4	NA	13	2 ^R ^MDL	TCEQ
	17	24	27	29	36	39	25	7	10	28	37	40	43	45	49	49	48	48	47	45	40	38	31	NA	17	2 ^R ^MDL	TCEQ
	31	26	20	14	14	16	15	19	25	39	42	44	45	47	48	48	49	48	48	46	42	36	33	NA	31	1 ^R ^MDL	TCEQ
	56	10	7	3	4	1	5	5	9	29	40	43	46	51	53	53	52	52	51	48	42	36	16	NA	56	1 ^R ^MDL	TCEQ
	61	2	2	3	3	0	0	1	14	31	35	40	44	46	48	49	49	47	47	43	33	18	8	NA	61	1 ^R ^MDL	TCEQ
	63	15	11	9	8	8	5	7	16	28	36	39	42	44	45	46	46	46	45	43	39	33	25	NA	63	1 ^R ^MDL	TCEQ
	69 ¹	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	LIM	CAL	CAL	CAL	29	28	NA	69 ¹	1 ^R ^MDL	Other Gov
	70	19	13	6	10	12	15	10	21	33	37	39	43	47	49	48	49	48	46	43	38	34	28	NA	70	1 ^R ^MDL	TCEQ
	71	14	15	12	7	5	6	11	21	31	41	43	44	47	49	49	50	49	47	41	34	31	30	NA	71	1 ^R ^MDL	TCEQ
	73	12	9	4	2	2	4	5	8	17	34	42	45	47	49	50	50	49	48	47	38	26	20	NA	73	1 ^R ^MDL	TCEQ
	75 ²	28	20	18	14	7	6	7	10	23	39	46	50	55	56	59	59	57	55	50	46	38	29	NA	75 ²	1 ^R ^MDL	TCEQ
	76	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	PMA	NA	76	1 ^R ^MDL	TCEQ
	77	7	4	5	4	5	6	7	17	32	37	41	43	44	45	46	46	46	46	42	38	32	32	NA	77	1 ^R ^MDL	TCEQ
	198	26	12	6	5	8	8	6	16	30	35	38	41	44	46	47	48	48	46	39	26	14	7	NA	198	1 ^R ^MDL	TCEQ
	402 ¹	23	25	19	20	15	14	16	24	31	36	41	43	46	48	49	48	48	47	42	30	19	7	NA	402 ¹	1 ^R ^MDL	Other Gov
	1032	25	24	23	17	18	11	23	27	37	44	45	47	51	51	51	50	51	49	44	39	35	33	NA	1032	1 ^R ^MDL	TCEQ
	1044	19	18	15	18	18	17	18	25	32	39	41	43	45	47	49	50	52	53	45	31	14	16	NA	1044	1 ^R ^MDL	TCEQ
	1051	22	20	22	20	20	18	17	21	34	40	42	45	48	49	51	52	53	51	47	46	46	43	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