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Daily Maximum Eight-Hour Ozone Averages for December 2022

The table below lists the peak daily maximum eight-hour ozone concentrations measured in December 2022 in each community where the TCEQ measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

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 with AQI colors
AreaMonitoring SitePOCDecember 2022
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 220172718NA
Keller C17222172719NA
Frisco C31/C680127212621NA
Denton Airport South C56/A163/X157121NV2517NA
Arlington Municipal Airport C61124172519NA
Dallas North No.2 C63/C679125192418NA
Rockwall Heath C69125202417NA
Grapevine Fairway C70/A301/X182120142717NA
Kaufman C71/A304/X071129232423NA
Granbury C73/C681125203023NA
Eagle Mountain Lake C75 122172922NA
Parker County C76127212824NA
Cleburne Airport C77/C682128182824NA
Dallas Hinton St. C401/C60/AH161 319162216NA
Dallas Executive Airport C402125222720NA
Greenville C1006/A198128242625NA
Pilot Point C10321NVNV2824NA
Italy C1044/A323127202119NA
Corsicana Airport C10511NV222322NA
AreaMonitoring SitePOCDecember 2022
Longview C19/A127/C644231272025NA
Tyler Airport Relocated C82132252223NA
Karnack C85/AFHP303130272523NA
AreaMonitoring SitePOCDecember 2022
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159123152122NA
Chamizal C41/AH126 120221821NA
Socorro Hueco C49/F312129212830NA
Skyline Park C721NV272128NA
Ivanhoe C414/F514126212425NA
AreaMonitoring SitePOCDecember 2022
Waco Mazanec C1037124172017NA
Temple Georgia C1045125152319NA
Killeen Skylark Field C1047126182521NA
AreaMonitoring SitePOCDecember 2022
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 226311914NA
West Orange C9/A1412NV371712NA
Port Arthur West C28/A128/A228128282312NA
Hamshire C64/C654130341614NA
SETRPC 40 Sabine Pass C640/C1654131361914NA
SETRPC 43 Jefferson Co Airport C643127282111NA
Nederland 17th Street C1035129342314NA
AreaMonitoring SitePOCDecember 2022
Austin North Hills Drive C3/A3222NV142120NA
Audubon C38117102117NA
AreaMonitoring SitePOCDecember 2022
Houston East C1/G316223221215NA
Houston Aldine C8/AF108/X150 225201715NA
Channelview C15/AH115 324181713NA
Northwest Harris Co. C26/A110/X154225201513NA
Hou.DeerPrk2 C35/235/1001/AFH139FP239127261515NA
Houston Bayland Park C53/A146 128261721NA
Conroe Relocated C78/A321131251817NA
Manvel Croix Park C84128251720NA
Clinton C403/C304/AH113 335282015NA
Houston North Wayside C405/C1033122181315NA
Houston Monroe C406125231417NA
Lang C408222191517NA
Houston Croquet C409227261622NA
Houston Westhollow C410/C3003121181013NA
Park Place C416137342621NA
Houston Harvard Street C417122231519NA
Sheldon C5511 N26201614NA
Baytown Wetlands Center C5521 N29281512NA
Crosby Library C5531 N30281714NA
West Houston C5541 N24211517NA
La Porte Sylvan Beach C5561 N34261210NA
Mercer Arboretum C5571 N28221416NA
Tom Bass C5581 N29251421NA
Katy Park C5591 N25231418NA
Atascocita C5601 N27201414NA
Meyer Park C5611 N26201415NA
Bunker Hill Village C5621 N26231219NA
Huffman Wolf Road C5631 N27301815NA
UH Moody Tower C6951 N25261818NA
UH WG Jones Forest C6981 N28221818NA
Lynchburg Ferry C1015/A165 129221111NA
Lake Jackson C1016 133312131NA
Baytown Garth C1017132372419NA
Galveston 99th St. C1034/A320/X183136372212NA
Liberty Sam Houston Library C16261 N27292114NA
AreaMonitoring SitePOCDecember 2022
San Antonio
San Antonio Northwest C23217152316NA
Camp Bullis C58 121142516NA
Calaveras Lake C59121141716NA
Heritage Middle School C6221 N19121615NA
Government Canyon C16101 N10989NA
AreaMonitoring SitePOCDecember 2022
Corpus Christi-Victoria
Corpus Christi West C4226111527NA
Corpus Christi Tuloso C21124141524NA
Victoria C87123161724NA
AreaMonitoring SitePOCDecember 2022
Lower Rio Grande Valley
Mission C43/AP143123111019NA
Harlingen Teege C1023120131723NA
AreaMonitoring SitePOCDecember 2022
Laredo College C441 N2214129NA
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
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.