X157 Data by Site by Date (all parameters)

Use this form to retrieve hourly data collected at Denton Airport South C56/A163/X157. Although this is the most current data, it is not considered official until it has been certified by the technical staff. This information is updated hourly.

This web page provides the most current hourly averaged data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour are based on measurements taken from noon to 1:00 p.m. The noon average will not be calculated until after 1:00 p.m. The noon average will then be available on our external server from 1:15 p.m. to 1:30 p.m. This results in an apparent one-hour time lag in the data. We also present our data in Local Standard Time for each measuring site. For most of Texas this is Central Standard Time. During Daylight Savings, this introduces another apparent one-hour time lag in the data.

Use the controls below to select a different date or time format. 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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Month:	Day:	Year:	Time Format:

Green underline for validated data

The table below contains hourly averages for all the pollutants and meteorological conditions measured at Denton Airport South C56/A163/X157 for Friday, April 19, 2024. All times shown are in CST.

Parameter Measured	Morning												Afternoon		Parameter Measured	POC
Parameter Measured	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	Parameter Measured	POC
NOy	1.7	1.9	1.7	2.3	3.2	3.1	8.1	11.6	PMA	7.8	6.2	5.9	7.6	NA	NOy	2 ^MDL
Nitric Oxide	0.6	0.6	0.5	0.6	0.8	0.8	2.4	4.5	PMA	CAL	CAL	CAL	CAL	NA	Nitric Oxide	1 ^MDL
Nitric Oxide	-0.9	-1.1	-1.0	-0.7	-0.4	-0.5	1.4	3.7	PMA	2.0	1.5	1.5	2.1	NA	Nitric Oxide	2 ^MDL
Nitrogen Dioxide	NEG	NEG	NEG	NEG	NEG	NEG	-2.5	-1.1	PMA	CAL	CAL	CAL	CAL	NA	Nitrogen Dioxide	1 ^R ^MDL
Oxides of Nitrogen	NEG	NEG	NEG	NEG	NEG	NEG	-0.1	3.4	PMA	CAL	CAL	CAL	CAL	NA	Oxides of Nitrogen	1 ^MDL
Ozone	25	24	25	26	25	26	23	22	22	24	23	24	25	NA	Ozone	1 ^R ^MDL
Wind Speed	9.7	8.4	7.9	9.5	8.7	8.7	7.9	8.5	7.2	7.0	7.2	7.7	6.5	NA	Wind Speed	1
Wind Direction	4	62	35	37	6	9	17	20	27	19	178	124	133	NA	Wind Direction	1
Resultant Wind Speed	9.6	8.2	7.8	9.3	8.5	8.6	7.6	8.3	6.9	6.6	6.9	7.3	6.0	NA	Resultant Wind Speed	1
Resultant Wind Direction	3	2	4	6	6	9	16	20	27	17	357	2	12	NA	Resultant Wind Direction	1
Maximum Wind Gust	19.1	18.2	17.0	18.0	16.8	17.6	20.0	17.1	15.8	14.9	14.4	15.2	14.5	NA	Maximum Wind Gust	1
Std. Dev. Wind Direction	10	11	12	12	12	12	16	14	17	18	16	19	24	NA	Std. Dev. Wind Direction	1
Outdoor Temperature	58.9	58.2	58.0	57.8	57.7	57.4	57.2	57.3	57.6	58.3	58.7	60.0	61.3	NA	Outdoor Temperature	1
Dew Point Temperature	51.5	51.7	51.8	51.3	51.1	50.7	50.5	50.6	50.9	51.4	51.6	52.1	52.7	NA	Dew Point Temperature	1
Relative Humidity	76.3	78.8	79.7	79.0	78.6	78.2	78.3	78.2	78.2	77.7	77.4	75.2	73.4	NA	Relative Humidity	1
Solar Radiation	0.000	0.000	0.000	0.000	0.000	0.001	0.048	0.134	0.181	0.255	0.265	0.591	0.647	NA	Solar Radiation	1
Precipitation	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NA	Precipitation	1
PM-2.5 (Local Conditions)	QAS	QAS	QAS	QAS	QAS	QAS	QAS	QAS	QAS	QAS	QAS	QAS	NA	NA	PM-2.5 (Local Conditions)	1 ^R ^MDL
Parameter Measured	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	Parameter Measured	POC
Parameter Measured	Morning												Afternoon		Parameter Measured	POC
	Maximum values for each parameter 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

Denton Airport South C56/A163/X157 Data by Site by Date (all parameters)