Skip to main content

Peak Daily One-Hour Ozone Averages for December 2023

The table below lists the peak daily one-hour ozone concentrations measured in December 2023 in each community where the TCEQ measures ozone. Concentrations are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion, and are truncated to an integer number.

The values that go into this table are calculated at 3:30 am each morning. Therefore, the current day will almost always have very low hourly averages that are not truly representative of local conditions for the day. Because of this, the report does not display the current day's data.

Use the selection boxes below to customize this report. You may select a different month, a different year, a different report format, and whether or not to include time on the report. Click on the Generate Report button once you have made your selections.

Month:Year:Report Format: Include time:
Include time
Highlight using AQI colors
AreaMonitoring SitePOCDecember 2023
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 229344331403541
Keller C17227344232383541
Frisco C31/C680129324335373044
Denton Airport South C56/A163/X157130304536403343
Arlington Municipal Airport C61128374331393442
Dallas North No.2 C63/C679128224433352945
Rockwall Heath C69128223735363340
Grapevine Fairway C70/A301/X182130294333402941
Kaufman C71/A304/X071131324540394049
Granbury C73/C681135464642474446
Eagle Mountain Lake C75 131444734404145
Parker County C76134484840464843
Cleburne Airport C77/C682135434536483844
Dallas Hinton St. C401/C60/AH161 325213929302839
Dallas Executive Airport C402127324836383948
Greenville C1006/A198132374745454252
Pilot Point C1032128304437423041
Italy C1044/A323130404335493844
Corsicana Airport C1051130334543514447
AreaMonitoring SitePOCDecember 2023
Longview C19/A127/C644235344141463243
Tyler Airport Relocated C82133274039404345
Karnack C85/AFHP303135293939444244
AreaMonitoring SitePOCDecember 2023
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159137404034364034
Chamizal C41/AH126 141444232363138
Socorro Hueco C49/F312144444239364239
Skyline Park C72147474535394644
Ivanhoe C414/F514142433929353937
Ojo De Agua C1021/FG121/FG2211424336NANANANA
AreaMonitoring SitePOCDecember 2023
Waco Mazanec C1037132354236473844
Temple Georgia C1045135384341514246
Killeen Skylark Field C1047133404542524546
AreaMonitoring SitePOCDecember 2023
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 232234140393544
West Orange C9/A141229203840353744
Port Arthur West C28/A128/A228127243639353658
Hamshire C64/C654126214340394150
SETRPC Port Arthur C6281 N333142NANANANA
SETRPC 40 Sabine Pass C640/C1654130244542414046
SETRPC 43 Jefferson Co Airport C643124233639353540
Nederland 17th Street C1035129204043363844
AreaMonitoring SitePOCDecember 2023
Austin North Hills Drive C3/A322235364139534142
Audubon C38138394139554644
AreaMonitoring SitePOCDecember 2023
Houston East C1/G316221163833343546
Houston Aldine C8/AF108/X150 221143737343341
Channelview C15/AH115 321183539373239
Northwest Harris Co. C26/A110/X154223193939473843
Hou.DeerPrk2 C35/235/1001/AFH139FP239120143835403148
Seabrook Friendship Park C45120173932403844
Houston Bayland Park C53/A146 125183939343246
Conroe Relocated C78/A321126254341484346
Manvel Croix Park C84119163634343740
Clinton C403/C304/AH113 319163140313637
Houston North Wayside C405/C1033117153034313336
Houston Monroe C406117113327342841
Lang C408225194138373343
Houston Croquet C409223143634273144
Houston Westhollow C410/C3003124183938373743
Park Place C416123153838283044
Houston Harvard Street C417124153735343044
Sheldon C5511 N22173340373735
Baytown Wetlands Center C5521 N17164139313245
Crosby Library C5531 N22153741444150
West Houston C5541 N16194244453546
La Porte Sylvan Beach C5561 N16133437303646
Mercer Arboretum C5571 N23184240474146
Tom Bass C5581 N21143737353448
Katy Park C5591 N24204042403240
Atascocita C5601 N22183939383946
Meyer Park C5611 N23184141463745
Bunker Hill Village C5621 N17153637343342
Huffman Wolf Road C5631 N23173839403751
UH Moody Tower C6951 N25173838393147
UH WG Jones Forest C6981 NNA224340513846
Lynchburg Ferry C1015/A165 110163834443343
Lake Jackson C1016 126163946334048
Baytown Garth C1017126204739393549
Galveston 99th St. C1034/A320/X183133144846384353
Oyster Creek C1607 1 N321939NANANANA
Liberty Sam Houston Library C16261 N23174639403647
AreaMonitoring SitePOCDecember 2023
San Antonio
San Antonio Northwest C23239394338515341
Camp Bullis C58 140384341515141
Calaveras Lake C59130414545575545
Heritage Middle School C6221 N34414544575544
AreaMonitoring SitePOCDecember 2023
Corpus Christi-Victoria
Corpus Christi West C4226384145425944
Corpus Christi Tuloso C21122414645516346
Victoria C87124233639464038
AreaMonitoring SitePOCDecember 2023
Lower Rio Grande Valley
Mission C43/AP143117334343405237
Harlingen Teege C1023129364242445541
AreaMonitoring SitePOCDecember 2023
Laredo College C441 N29474754485649
NA - Data not available.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

Interpreting the AQI

Air Quality Index

Each NAAQS pollutant has a separate AQI scale, with an AQI rating of 100 corresponding to the concentration of the Federal Standard for that pollutant. Additional information about the AQI and how it can be used is available from the EPA's AirNow web site.

Place your mouse pointer over the scale displayed above to view information about the Air Quality Index, and each of the rating levels.

The actual index calculation is different for each parameter measured and is specified by the EPA. The following table shows the various breakpoints used in calculating the AQI.

AQI Breakpoint Definitions
AQI Range 1hr Ozone
in ppm
8hr Ozone
in ppm
0 - 50 Not Defined 0 - 0.054
51 - 100 Not Defined 0.055 - 0.070
101 - 150 0.125 - 0.164 0.071 - 0.085
151 - 200 0.165 - 0.204 0.086 - 0.105
201 - 300 0.205 - 0.404 0.106 - 0.200
301 - 400 0.405 - 0.504 Not Defined
401 - 500 Not Defined Not Defined
500+ Not Defined Not Defined
  • The AQI for ozone is based on either the peak eight-hour running average since midnight OR the peak one-hour measurement since midnight.

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.