Chamizal C41/AH126 Data by Site by Date (all parameters)

This site has an Automated Gas Chromatograph. Click to view current AutoGC measurements at this site.

Use this form to retrieve hourly data collected at Chamizal C41/AH126 . 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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Green underline for validated data

The table below contains hourly averages for all the pollutants and meteorological conditions measured at Chamizal C41/AH126 for Sunday, May 12, 2024. All times shown are in MST.

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	2:00	3:00	Parameter Measured	POC
Carbon Monoxide	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.1	0.1	SPN	0.1	0.1	NA	NA	Carbon Monoxide	2 ^N ^MDL
Sulfur Dioxide	-0.1	-0.0	-0.1	-0.1	-0.0	-0.0	-0.0	0.1	0.1	0.0	0.0	0.0	-0.1	-0.1	NA	NA	Sulfur Dioxide	1 ^R ^MDL
NOy	11.3	13.7	11.6	11.8	10.3	10.1	10.0	15.3	11.7	6.5	2.4	1.9	1.3	1.6	NA	NA	NOy	2 ^MDL
Nitric Oxide	SPN	SPN	0.1	-0.1	-0.1	0.3	1.2	3.0	1.9	0.7	0.1	0.4	0.2	0.3	NA	NA	Nitric Oxide	1 ^MDL
Nitric Oxide	-0.0	0.1	0.1	0.1	0.1	0.4	1.7	4.0	2.8	1.3	0.4	0.1	0.2	0.2	NA	NA	Nitric Oxide	2 ^MDL
Nitrogen Dioxide	SPN	SPN	10.7	11.1	9.3	9.2	8.3	11.4	9.4	5.4	2.2	1.9	1.2	1.3	NA	NA	Nitrogen Dioxide	1 ^R ^MDL
Oxides of Nitrogen	SPN	SPN	10.8	10.9	9.1	9.5	9.5	14.4	11.3	6.0	2.3	2.2	1.4	1.5	NA	NA	Oxides of Nitrogen	1 ^MDL
Ozone	42	36	36	34	36	35	36	34	41	52	61	62	66	66	NA	NA	Ozone	1 ^R ^MDL
Wind Speed	9.2	10.6	8.7	5.9	7.2	6.8	6.5	4.2	3.6	7.4	10.2	11.7	15.8	14.3	NA	NA	Wind Speed	1
Wind Direction	259	270	261	260	261	269	265	250	262	271	282	274	271	276	NA	NA	Wind Direction	1
Resultant Wind Speed	9.1	10.5	8.5	5.4	7.0	6.7	6.3	3.9	2.9	7.0	9.0	10.8	14.9	13.7	NA	NA	Resultant Wind Speed	1
Resultant Wind Direction	259	270	261	261	262	269	265	251	256	271	278	276	271	276	NA	NA	Resultant Wind Direction	1
Maximum Wind Gust	15.4	18.2	16.1	13.3	12.5	11.9	11.1	7.7	9.8	19.1	22.5	25.6	28.6	25.6	NA	NA	Maximum Wind Gust	1
Std. Dev. Wind Direction	9	8	11	25	12	12	11	18	36	19	28	23	19	17	NA	NA	Std. Dev. Wind Direction	1
Outdoor Temperature	71.2	68.6	65.8	64.3	62.8	61.7	62.8	66.1	69.7	72.8	75.4	77.6	78.5	79.7	NA	NA	Outdoor Temperature	1
Dew Point Temperature	22.3	22.8	23.1	24.5	25.5	26.4	27.8	30.7	35.2	35.4	30.8	28.2	25.8	25.8	NA	NA	Dew Point Temperature	1
Relative Humidity	15.7	17.6	19.7	22.0	24.1	25.9	26.5	26.5	28.1	25.6	19.5	16.3	14.3	13.7	NA	NA	Relative Humidity	1
Solar Radiation	0.000	0.000	0.000	0.000	0.000	0.007	0.332	0.663	0.996	1.270	1.495	1.602	1.606	1.514	NA	NA	Solar Radiation	1
PM-10 (Standard Conditions)	23.7	39.8	26.4	35.3	25.9	25.2	27.8	43.6	40.0	25.4	22.2	22.8	29.1	27.2	NA	NA	PM-10 (Standard Conditions)	6 ^R
PM10-2.5 Local Conditions	17.07	30.18	19.38	26.76	18.93	18.07	20.12	32.08	28.93	17.18	15.44	15.81	21.07	19.44	NA	NA	PM10-2.5 Local Conditions	6
PM-2.5 (Local Conditions)	3.7	5.0	4.0	4.7	4.2	4.5	4.5	6.1	6.0	4.8	3.7	3.7	3.8	3.8	NA	NA	PM-2.5 (Local Conditions)	6 ^R
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	2:00	3:00	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.
	^N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used 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

Chamizal C41/AH126 Data by Site by Date (all parameters)