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Four Highest Eight-Hour Ozone Concentrations in 2022
as of December 9

Use this form to retrieve the four highest eight-hour ozone concentration averages from data collected at TCEQ monitoring sites beginning December 14, 2005 through today. Although this is our most current data, it is not considered official until it has been certified by our technical staff. This information is updated hourly. All times shown are in Local Standard Time.

The table below lists the four highest daily maximum eight-hour ozone concentrations measured in 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.) The fourth-highest average is in bold black (unless it is highlighted). All ozone measurements are in parts per billion. Times are shown in 24-hour format and correspond to the beginning of the eight hour average.

Use the selection boxes below to customize this report. You may select a different year or a different report format. If you want to cut and paste data from this web page into another application, such as a spreadsheet, select the comma-delimited format. Click on the Generate Report button once you have made your selections.

YearReport Format
Highlight with AQI colors
Area Monitoring Site POC Highest Second Highest Third Highest Fourth Highest
Date Time Value Date Time Value Date Time Value Date Time Value
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 206/29/202211008506/30/202210008405/27/202212008305/16/2022110080
Keller C17206/30/202209008105/27/202212007607/13/202213007406/29/2022100072
Frisco C31/C680106/30/202210008306/10/202212007703/26/202212007709/23/2022100073
Midlothian OFW C52/A137103/02/202211006803/26/202211006503/03/202211006404/02/2022110063
Denton Airport South C56/A163/X157106/30/2022100010006/09/202212008106/22/202211007906/21/2022100078
Arlington Municipal Airport C61108/11/202211007806/29/202211007705/27/202211007705/16/2022110077
Dallas North No.2 C63/C679106/30/202209007605/27/202211007509/22/202211007410/06/2022110072
Rockwall Heath C69109/22/202210007010/06/202211006903/26/202211006303/02/2022110062
Grapevine Fairway C70/A301/X182106/30/202210009305/27/202212008610/06/202211007807/13/2022100078
Kaufman C71/A304/X071110/06/202212007403/02/202211007405/28/202212007205/27/2022100069
Granbury C73/C681107/13/202210008506/29/202212008408/19/202211008308/11/2022120081
Eagle Mountain Lake C75 106/30/202210008705/27/202213008207/15/202211007806/29/2022110077
Parker County C76106/29/202212008407/13/202214008305/16/202212007709/29/2022120075
Cleburne Airport C77/C682108/11/202212008806/27/202210008307/13/202209008206/28/2022120082
Dallas Hinton St. C401/C60/AH161 309/22/202211007109/12/202211006610/06/202210006508/19/2022120063
Dallas Executive Airport C402107/09/202210008209/22/202211008005/27/202211008010/06/2022110077
Greenville C1006/A198103/02/202211006910/06/202210006803/26/202211006703/03/2022100065
Pilot Point C1032106/30/202210009106/10/202213008206/23/202212007706/20/2022090077
Italy C1044/A323108/11/202211006907/13/202210006703/02/202211006705/16/2022110066
Corsicana Airport C1051105/26/202211007105/28/202208007006/29/202211006703/02/2022110066
Tyler-Longview-Marshall
Longview C19/A127/C644207/13/202210008306/29/202209006606/20/202211006609/23/2022110064
Tyler Airport Relocated C82107/13/202211007706/29/202211007707/11/202211007205/26/2022100071
Karnack C85/AFHP303106/21/202210007703/03/202211007206/29/202209006709/24/2022090065
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159107/02/202211007306/30/202210007208/13/202212006907/03/2022090068
Chamizal C41/AH126 106/30/202210007507/02/202211007308/13/202212007107/03/2022090068
Socorro Hueco C49/F312108/13/202211007807/02/202210007608/03/202210007507/05/2022110075
Skyline Park C72108/27/202210007407/04/202209007406/30/202211007408/13/2022110072
Ivanhoe C414/F514108/13/202212007107/02/202211007106/30/202210006906/11/2022100064
Ojo De Agua C1021/FG121/FG221108/13/202214008406/30/202210008207/03/202209008008/04/2022110079
Waco
Waco Mazanec C1037108/11/202212007003/26/202211006604/02/202211006509/15/2022100062
Temple Georgia C1045106/29/202211007308/11/202212007009/29/202211006705/27/2022090067
Killeen Skylark Field C1047106/29/202212007905/27/202209007208/11/202214007110/14/2022110069
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 209/21/202211007405/28/202210006610/20/202210006105/26/2022110061
West Orange C9/A141205/28/202212007310/07/202210006310/20/202211006209/21/2022100062
Port Arthur West C28/A128/A228105/26/202211006705/28/202210006510/07/202210006309/14/2022110060
Hamshire C64/C654105/26/202210007106/20/202208006410/20/202210006310/08/2022100062
SETRPC Port Arthur C6281 N05/26/202211007210/07/202210007105/28/202210007005/25/2022100064
SETRPC 40 Sabine Pass C640/C1654105/26/202210007205/25/202210006301/14/202211006304/28/2022140062
SETRPC Mauriceville 42 C642/C311/C6651 N05/28/202211008209/24/202209006809/15/202210006706/05/2022090067
SETRPC 43 Jefferson Co Airport C643109/14/202211007105/28/202210006905/26/202211006910/07/2022100065
Nederland 17th Street C1035109/14/202210007905/28/202210007405/26/202210006910/07/2022100065
Austin
Austin North Hills Drive C3/A322209/29/202211007909/13/202210007606/29/202212007510/04/2022100073
Audubon C38106/29/202211006809/29/202210006710/04/202211006610/01/2022100066
Dripping Springs School C6141 N06/29/202211008705/26/202211008303/02/202211008310/03/2022110081
CAPCOG Lake Georgetown C6901 N06/29/202212008809/29/202211008509/13/202210008108/11/2022120074
Lockhart C16041 N05/26/202211009806/29/202210008006/04/202211006905/27/2022120069
St. Edwards University C16051 N08/12/202211007609/12/202211007109/29/202210006909/13/2022100069
CAPCOG Bastrop CAMS16121 N05/26/202211008909/15/202213008509/14/202212008209/13/2022110081
CAPCOG Elgin C16131 N05/26/202211008406/29/202211007503/02/202210007205/27/2022110069
CAPCOG East Austin C16191 N09/29/202211007906/29/202212007808/12/202211007509/13/2022110074
CAPCOG Round Rock Brushy Creek W C16201 N09/29/202210008206/29/202212008009/13/202210007907/12/2022110077
CAPCOG San Marcos Staples Road C16751 N05/26/202211009006/29/202210008208/12/202211008009/12/2022110078
Houston-Galveston-Brazoria
Houston East C1/G316206/20/202207009606/16/202211007909/21/202210007506/26/2022100073
Houston Aldine C8/AF108/X150 205/16/202210007105/12/202210006906/20/202210006806/23/2022110064
Channelview C15/AH115 306/20/202209007205/26/202210006810/08/202210006306/26/2022100063
Northwest Harris Co. C26/A110/X154205/06/202211009110/14/202211008004/27/202211007906/20/2022120074
Hou.DeerPrk2 C35/235/1001/AFH139FP239106/26/202210007606/20/202208007305/26/202210007310/07/2022100068
Seabrook Friendship Park C45110/07/202210007305/26/202209006210/06/202211006003/02/2022100059
Houston Bayland Park C53/A146 109/21/202211009209/13/202211008910/08/202210008709/20/2022100084
Conroe Relocated C78/A321109/24/202211007805/28/202210007810/14/202211007305/17/2022100073
Manvel Croix Park C84109/22/202210007609/21/202210007408/11/202211007310/05/2022100072
Clinton C403/C304/AH113 306/20/202210008709/21/202210008509/13/202210007606/16/2022110076
Houston North Wayside C405/C1033106/20/202210007505/16/202210006506/16/202211006409/21/2022110062
Houston Monroe C406105/26/202211006509/21/202210006110/05/202210006006/29/2022100060
Lang C408206/20/202210009004/27/202211008409/21/202211007909/23/2022100071
Houston Croquet C409209/21/202211007810/08/202210007409/13/202211007309/14/2022100072
Houston Westhollow C410/C3003109/21/202211008209/13/202211007506/20/202211007510/08/2022100073
Park Place C416109/21/202211008006/20/202210007910/08/202210007309/13/2022090072
Houston Harvard Street C417106/20/202210009709/21/202211008804/27/202210008210/09/2022100078
Sheldon C5511 N06/20/202210006505/26/202210006306/23/202210006205/16/2022100062
Baytown Wetlands Center C5521 N05/26/202210006806/26/202209006610/07/202210006205/27/2022100061
Crosby Library C5531 N05/26/202210006505/16/202210006306/23/202210006205/28/2022080060
West Houston C5541 N06/20/202211009204/27/202211008809/21/202211007909/23/2022100076
La Porte Sylvan Beach C5561 N10/07/202210006805/26/202210006609/23/202210006105/27/2022100060
Mercer Arboretum C5571 N05/12/202210007609/24/202211006906/23/202211006910/14/2022110066
Tom Bass C5581 N10/05/202211007009/21/202211006909/14/202210006910/06/2022110068
Katy Park C5591 N09/21/202212007509/15/202210007509/23/202211007406/20/2022110070
Atascocita C5601 N09/24/202210006506/23/202211006305/16/202211006003/26/2022100058
Meyer Park C5611 N10/14/202211006909/23/202210006805/12/202210006805/06/2022100068
Bunker Hill Village C5621 N09/21/202211007710/09/202211007110/08/202211007109/23/2022110067
Huffman Wolf Road C5631 N05/28/202209006906/25/202210006410/15/202209006306/23/2022110063
HRM-3 Haden Road C603/A114 1 N06/20/202210008409/21/202210007306/26/202210007206/16/2022110072
Wallisville Road C617 1 N05/26/202210007306/26/202210007210/07/202210006609/25/2022100066
Texas City 34th St. C620 1 N10/07/202211008805/25/202211008009/23/202210007909/22/2022090076
UH Moody Tower C6951 N06/20/202210008509/21/202211008309/20/202211007710/08/2022100076
UH WG Jones Forest C6981 N05/12/202211008309/24/202211007810/14/202211007606/23/2022120073
Lynchburg Ferry C1015/A165 108/10/202210007309/25/202209006906/26/202210006710/08/2022100063
Lake Jackson C1016 109/26/202211007408/11/202212007309/22/202210007010/08/2022100069
Baytown Garth C1017106/26/202210007805/26/202210007706/20/202209007210/07/2022100071
Galveston 99th St. C1034/A320/X183105/25/202213008909/23/202211008110/07/202212007409/22/2022110073
UH Smith Point C16061 N05/25/202209007710/07/202210007209/23/202214007105/26/2022100067
Oyster Creek C1607 1 N09/23/202211007809/22/202211007509/11/202212007308/11/2022110070
UH Launch Trailer C16111 N06/20/202210008609/21/202211008309/20/202211007910/08/2022100076
Liberty Sam Houston Library C16261 N03/26/202210007109/15/202210006704/09/202209006603/02/2022100066
San Antonio
San Antonio Northwest C23209/30/202211007906/29/202211007910/01/202210007710/06/2022100076
Camp Bullis C58 110/06/202210007610/01/202210007509/30/202211007506/29/2022110075
Calaveras Lake C59106/29/202210007809/29/202211007409/30/202211007008/12/2022110070
Elm Creek Elementary C5011 N06/29/202210008209/30/202211007309/12/202211007006/30/2022100069
Fair Oaks Ranch C5021 N06/29/202211007507/01/202211006806/30/202210006808/12/2022120059
Bulverde Elementary C5031 N03/25/202211006204/03/202210006003/26/202210005906/29/2022110058
New Braunfels Airport C5041 N05/26/202210006706/29/202210005903/25/202210005909/29/2022110058
AACOG City of Garden Ridge C505 1 N06/29/202211007405/26/202211007010/06/202210006510/01/2022100065
Seguin Outdoor Learning Center C5061 N09/29/202211006010/03/202210005905/26/202210005910/06/2022100058
Heritage Middle School C6221 N06/29/202211008009/29/202211007710/06/202210007309/30/2022110070
CPS Pecan Valley C6781 N09/29/202211005209/30/202211005006/29/202211005005/26/2022100049
Government Canyon C16101 N09/30/202211006906/29/202211006810/01/202210006710/06/2022100064
Corpus Christi-Victoria
Corpus Christi West C4210/08/202211007109/30/202210006610/03/202210006209/29/2022110062
Corpus Christi Tuloso C21110/08/202210006405/26/202208006104/06/202213005810/03/2022100057
Victoria C87110/08/202213006209/30/202213006205/26/202210006003/01/2022110060
Lower Rio Grande Valley
Mission C43/AP143109/30/202210007010/08/202211006410/03/202210006410/01/2022090063
Harlingen Teege C1023110/09/202210005810/08/202210005809/30/202210005810/03/2022090057
Laredo
Laredo College C441 N11/13/202211004711/18/202213004211/17/202213004211/15/2022130041
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
 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.