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Peak Daily One-Hour Ozone Averages for July 2024

The table below lists the peak daily one-hour ozone concentrations measured in July 2024 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 SitePOCJuly 2024
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2323940334981524665847968323039
Keller C172NA4033NA4979555566788667373141
Frisco C31/C68015756575054564948618110273464045
Denton Airport South C56/A163/X15715552575156636357667910078423241
Arlington Municipal Airport C611232841395784564679918770353446
Dallas North No.2 C63/C6791454748464956482860799068423647
Rockwall Heath C691435238334950402356756757323036
Grapevine Fairway C70/A301/X1821434342394565525159799266363139
Kaufman C71/A304/X0711426948375263462372787372363841
Granbury C73/C6811363946365677484569707164363847
Eagle Mountain Lake C75 1354241344981585661748676373441
Parker County C761253136264570424360606258292735
Cleburne Airport C77/C6821384344416071524178697366363348
Dallas Hinton St. C401/C60/AH161 3384139414860502864868759363041
Dallas Executive Airport C4021404638405672513172798864403650
Greenville C1006/A1981176340345459472561636562323437
Pilot Point C103216066615555585354648110286513949
Italy C1044/A3231364134365653442878707057333438
Corsicana Airport C10511436252415656452686767362333643
AreaMonitoring SitePOCJuly 2024
Longview C19/A127/C6442444036304157482039677849322824
Tyler Airport Relocated C821374435403857462453636766363632
Karnack C85/AFHP3031344848333940441534515658413436
AreaMonitoring SitePOCJuly 2024
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X1591407847535359615364766658565154
Chamizal C41/AH126 1427657635969675570856957585663
Socorro Hueco C49/F3121397060646264705972747163615359
Skyline Park C721526553646169695973827365615456
Ivanhoe C414/F5141417551545456584960666255524448
Ojo De Agua C1021/FG121/FG2211536858656678596378787061585658
AreaMonitoring SitePOCJuly 2024
Waco Mazanec C10371383435364856483277877657343538
Temple Georgia C10451341628324551363559687538323140
Killeen Skylark Field C10471544644444855393861728042384147
AreaMonitoring SitePOCJuly 2024
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2377634254460233146465657484526
West Orange C9/A1412306344193455162641477045413432
Port Arthur West C28/A128/A2281397330192747202543454440332621
Hamshire C64/C6541265322184228161240484818152020
SETRPC 40 Sabine Pass C640/C1654154912519253424336252423343NANA
SETRPC 43 Jefferson Co Airport C6431416232193348216039454848342422
Nederland 17th Street C10351457735233955212945505459452624
AreaMonitoring SitePOCJuly 2024
Austin North Hills Drive C3/A3222393532334851404565737733293135
Audubon C381413632344844394056727730293136
Dripping Springs School C6141 N444232334747434357778831273341
CAPCOG Lake Georgetown C6901 N433632344743393520646122NANA35
Lockhart C16041 N343128304145394565666425242833
CAPCOG Bastrop CAMS16121 N222322233236313650565619182626
CAPCOG Elgin C16131 N312526254041413651605626233026
CAPCOG East Austin C16191 N333329304460374361667127242831
CAPCOG Round Rock Brushy Creek W C16201 N413430334746374055676830323436
CAPCOG Taylor Murphy Park C16291 N393331314744394060656227NANA37
CAPCOG Lake Kyle Park C16301 N322727273940364156NANANANANA28
CAPCOG San Marcos Staples Road C16751 N342728293942364261636430222731
AreaMonitoring SitePOCJuly 2024
Houston East C1/G316210970443259572421NANANANANANA26
Houston Aldine C8/AF108/X150 28099554469592921NA667539766445
Channelview C15/AH115 39986403381492417NANANANANA1443
Northwest Harris Co. C26/A110/X1542456447263437262648567134412528
Hou.DeerPrk2 C35/235/1001/AFH139FP23917558242638472921NA617733413427
Seabrook Friendship Park C4517352302538482621105636832313427
Houston Bayland Park C53/A146 16551353643513521NANANA31323030
Conroe Relocated C78/A32115598875351383122NA536043736050
Manvel Croix Park C841483526232649323068878035252424
Clinton C403/C304/AH113 310054342645584519NANANANANA4826
Houston North Wayside C405/C10331938043326050271670616929494333
Houston Monroe C406163392621284826NANANANANANANA21
Lang C40826761454345502620NANANANA183431
Houston Croquet C40924738242431412917NANANA8192419
Houston Westhollow C410/C30031414730243143311958768829272425
Park Place C41617850312639543119NANANANA253029
Houston Harvard Street C4171806044374856353374759132404235
Sheldon C5511 N6987533670482018NANANANANANANA
Baytown Wetlands Center C5521 N86552623466920NANANANANANANANA
Crosby Library C5531 N51816843834222NANANANANANANA49
West Houston C5541 N4554352333393214NANANANANANANA
La Porte Sylvan Beach C5561 N105542724375127NANANANANANANANA
Tom Bass C5581 N544125232949312364807323213NA
Katy Park C5591 N374734212834NANANANANANANANANA
Atascocita C5601 N71102784574462325NANANANANANANA
Meyer Park C5611 N5891574344392716NANANANANANANA
Bunker Hill Village C5621 N494935333845291954638418262118
Huffman Wolf Road C5631 N37NA7545634NANANANANANANANANA
HRM-3 Haden Road C603/A114 1 N110683630574720NANANANANANANANA
Wallisville Road C617 1 N64694435774826NANANANANANANANA
Texas City 34th St. C620 1 N84502420315034NANANANANANANANA
UH Moody Tower C6951 N735033254052282873728423293129
Lynchburg Ferry C1015/A165 112279363267632520NANANA23403530
Lake Jackson C1016 131241821244131NANA633825251918
Baytown Garth C10171626844347845243264606033NA653
Galveston 99th St. C1034/A320/X18314634182028553422NANANA41412220
Oyster Creek C1607 1 N36282021234932NANANANANANANANA
Liberty Sam Houston Library C16261 N2865564356261915NANANA11243372
AreaMonitoring SitePOCJuly 2024
San Antonio
San Antonio Northwest C2323423NANANANANANA69596931263032
Camp Bullis C58 1413733355547413863617327193336
Calaveras Lake C591362830303445464459496022302530
Elm Creek Elementary C5011 N373033374153575663637236333635
Fair Oaks Ranch C5021 N463939416442474153688335203638
Bulverde Elementary C5031 N393228324733363140445321162431
New Braunfels Airport C5041 N392728303540333653556629242631
AACOG City of Garden Ridge C505 1 N403029323943423759536628192635
Seguin Outdoor Learning Center C5061 N372627293036353552556023242631
Heritage Middle School C6221 N373335333846514765586928322835
CPS Pecan Valley C6781 N181516172430252334343816181619
Government Canyon C16101 N302628304650454065637329212828
AreaMonitoring SitePOCJuly 2024
Corpus Christi-Victoria
Corpus Christi West C42191919202134334728283023231820
Corpus Christi Tuloso C211221819202137364335322723211822
Victoria C871412222243245394858483314202126
AreaMonitoring SitePOCJuly 2024
Lower Rio Grande Valley
Mission C43/AP1431171815192221214126232618211913
Harlingen Teege C10231182322222616323431222122232624
AreaMonitoring SitePOCJuly 2024
Laredo College C441 N282732313028484347413729273136
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.