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Peak Daily One-Hour Ozone Averages for July 2018

The table below lists the peak daily one-hour ozone concentrations measured in July 2018 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 2018POCMonitoring Site
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 237435561706263607343495044424250424951532Ft. Worth Northwest C13/AH302
Keller C17240525558655457557342565747454355485757592Keller C17
Frisco C31/C680148637048474456545465806660544959738679811Frisco C31/C680
Midlothian OFW C52/A13713136404852NANANA4433374435343437334652501Midlothian OFW C52/A137
Denton Airport South C56/A163/X157143586850474450495752675852515165536662631Denton Airport South C56/A163/X157
Arlington Municipal Airport C61136424758594861585340424739363739414651511Arlington Municipal Airport C61
Dallas North No.2 C63/C679144505848484256546265616845454454637870691Dallas North No.2 C63/C679
Rockwall Heath C69131364337413554494451465034313135636255651Rockwall Heath C69
Grapevine Fairway C70/A301/X182141496457564855547050697550474557536865641Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071140504246504059524644434845363639385051521Kaufman C71/A304/X071
Granbury C73/C681138434167546368665040424940373837354450531Granbury C73/C681
Eagle Mountain Lake C75 144476661655059578544555649485158455256601Eagle Mountain Lake C75
Parker County C761NANANANANANANANA4839485451434144414553551Parker County C76
Cleburne Airport C77/C682137454361595369665336495046424139364854531Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 339435054534758565963495842393746566357603Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402135414653554559555345465139363743424753531Dallas Executive Airport C402
Greenville C1006/A198131364342434255504854535143353639687063741Greenville C1006/A198
Pilot Point C1032145677843444352535055595460555267617171711Pilot Point C1032
Italy C1044/A3231303342474337514838NANA4131333241374752521Italy C1044/A323
Corsicana Airport C10511364944505143565144NANA4947383741395456511Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Longview C19/A127/C644223355737494760485131364241363137414739422Longview C19/A127/C644
Tyler Airport Relocated C82132384644463958474437414641383444384856631Tyler Airport Relocated C82
Karnack C85/AFHP303145574136382743394434454052535642645863651Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X151257535774545460635762626959756077655474622El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159155525568535254615350496755675769585566581Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 159555572484955615255566458726076605670571Chamizal C41/AH126
Socorro Hueco C49/F312155505864494945564741435455475954486163531Socorro Hueco C49/F312
Skyline Park C72156565965565758626054647364746271676078581Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N515241NANANANANANANANANANANANANA404659493BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414156575566525151595449507063636363616071531Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Waco Mazanec C1037131334950424148503837424232353347414654531Waco Mazanec C1037
Temple Georgia C1045134385240464948533339413837383548465355541Temple Georgia C1045
Killeen Skylark Field C1047140486038475153563453484951454145577265631Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 216296122324051363556473726242237546146372Beaumont-Downtown C2/A112/C2002
West Orange C9/A141228466337415553353563545647483748766535382West Orange C9/A141
Port Arthur West C28/A128/A228118213633586444363852343526252729543431321Port Arthur West C28/A128/A228
Hamshire C64/C654121277331585753382732403131282641754944331Hamshire C64/C654
SETRPC Port Arthur C6281 N182039327562433940152353932282728533233351SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C1654119163632594840362426303525262624363227291SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N32534340314158433360415145503550636359601SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643122244635485755394258404028282929704533321SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1151837182849513334493636222323NA654532291Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Austin Northwest C3/A322232355036415346472538403835343338516452492Austin Northwest C3/A322
Audubon C38130365433405543472138424237353238475853511Audubon C38
Fayette County C6012 N29263219464348372330302827282428303332332Fayette County C601
Dripping Springs School C6141 N31364334415147482836394436343342454648511Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N27313131374738472632343230312630313837361CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N36466636405346482647474743393542536257571CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N33364838455750532837404134353134454546481Gorzycki Middle School C1603
Lockhart C16041 N29313432374740402734333329292529343938371Lockhart C1604
St. Edwards University C16051 N27293438385443462333343330302631384937371St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N36364250477046432935373836373036394142441CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N27294041384442472432343332302935365341391CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Houston East C1/G316230465523514855262741624044362343485243472Houston East C1/G316
Houston Aldine C8/AF108/X150 239695223604754403391705662473455556252682Houston Aldine C8/AF108/X150
Channelview C15/AH115 333485819514445363579795660423456636657613Channelview C15/AH115
Northwest Harris Co. C26/A110/X154239423821554448391959373939342638334037442Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239125364725505746363744463834322335404432361Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4512329412345584235343915NANANANA33343430331Seabrook Friendship Park C45
Houston Bayland Park C53/A146 122283626506358352932372832262432363829351Houston Bayland Park C53/A146
Conroe Relocated C78/A321155764432353641503177496265513143374641571Conroe Relocated C78/A321
Manvel Croix Park C84120233627517153362929302826262026292826311Manvel Croix Park C84
Clinton C403/C304/AH113 323323826455449333244412835292329NA4234343Clinton C403/C304/AH113
Houston North Wayside C405128434517464250302567543741312541454940461Houston North Wayside C405
Houston Monroe C406120293726415544352728372727252028343826301Houston Monroe C406
Lang C408232453932584962422856434147382636394439442Lang C408
Houston Croquet C409219243220447959332733362727242331323629302Houston Croquet C409
Houston Westhollow C410135443629565964383238363129262127323431321Houston Westhollow C410
Park Place C416123334430467454333544423131282331414639371Park Place C416
Baytown Wetlands Center C5521 N12162311272720161714292022181218242318171Baytown Wetlands Center C552
Crosby Library C5531 N49726219334351382955837963564170717467781Crosby Library C553
La Porte Sylvan Beach C5561 NNA161819NANANANANANANANANANANANANANANANA1La Porte Sylvan Beach C556
Tom Bass C5581 N15232818255337231821242523211919232725261Tom Bass C558
Katy Park C5591 N13202821464440241630242326191722212423261Katy Park C559
Atascocita C5601 N39694212332635231668806157442755526551631Atascocita C560
Meyer Park C5611 N25372413372628231434232725251422212622241Meyer Park C561
Bunker Hill Village C5621 N24333122414446272233342831271825323329311Bunker Hill Village C562
HRM-3 Haden Road C603/A114 1 N27425121465047303552603647352641475444481HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N36546621585047373943996866443063817363591Wallisville Road C617
Danciger C618 1 N16172515355745261720201917151516191920211Danciger C618
Texas City 34th St. C620 1 N17194328405450352733362930312429252524281Texas City 34th St. C620
UH Moody Tower C6951 N25364634546257373648513836302842475044441UH Moody Tower C695
UH WG Jones Forest C6981 N55754332424443452883465566512842374841521UH WG Jones Forest C698
UH West Liberty C6991 N42665221333342382950677362513864575761811UH West Liberty C699
Lynchburg Ferry C1015/A165 1293754NANANANANA2945686464352344636452421Lynchburg Ferry C1015/A165
Lake Jackson C1016 118173924345641342827222023192021192120231Lake Jackson C1016
Baytown Garth C1017136556621594948384142916666453268827968621Baytown Garth C1017
Galveston 99th St. C1034/A320/X183119193941274947362825262522201920252120211Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N17184032305040342323232334232121202221231Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
San Antonio
San Antonio Northwest C23232354346425556522936434238343133434250482San Antonio Northwest C23
Camp Bullis C58 133405050375050543741494640393437565556571Camp Bullis C58
Calaveras Lake C59133333435415954472329323331312730314238381Calaveras Lake C59
Elm Creek Elementary C5011 N30313739455358503530363732322930393843421Elm Creek Elementary C501
Fair Oaks Ranch C5021 N34445445405444523943495043413638615660601Fair Oaks Ranch C502
Bulverde Elementary C5031 N34385447405041463242474643403538525958561Bulverde Elementary C503
New Braunfels Airport C5041 N27293637375842402336343430302529353937381New Braunfels Airport C504
City of Garden Ridge C5051 N29324248405146452830313228302530395450461City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N27293536375044422334343330302630354037371Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N30313234395750442127313028292528303936351Heritage Middle School C622
CPS Pecan Valley C6781 N28293436395547422331363330292527384442431CPS Pecan Valley C678
Government Canyon C16101 N31364341425247533529403835322629413745451Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C4221222031294549351821212121222121192122232Corpus Christi West C4
Corpus Christi Tuloso C21119191835293444311721201820201920172021231Corpus Christi Tuloso C21
Victoria C871NA182428405043362221292727262226283433341Victoria C87
Ingleside C6851 N23191738294042311720191818192020162020221Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP143122232330272238262226282120232021232727221Mission C43/AP143
Harlingen Teege C1023123242226202441222524302624242122222124231Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P244127293131225448402727323031332729354142391Laredo Vidaurri C44/AFGP144/P244
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.