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Daily Maximum Eight-Hour Ozone Averages for July 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in July 2018 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 SitePOCJuly 2018POCMonitoring Site
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2343949536050585659344441413738433946232Ft. Worth Northwest C13/AH302
Keller C172374451515646565363355051454140494452232Keller C17
Frisco C31/C6801425363454339525249506557524744546270251Frisco C31/C680
Midlothian OFW C52/A13712931374341NANANANV273240313031333241191Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571385360444340494754445250464545554552241Denton Airport South C56/A163/X157
Arlington Municipal Airport C611313541495343575450303843353334363844241Arlington Municipal Airport C61
Dallas North No.2 C63/C6791384351444537505148475155434039475865241Dallas North No.2 C63/C679
Rockwall Heath C691283240343626464536423842312928335054141Rockwall Heath C69
Grapevine Fairway C70/A301/X1821374558484940525158NV5462474240504761251Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711303839424637554839364045373333343545211Kaufman C71/A304/X071
Granbury C73/C6811333439544851645946353844373536353442261Granbury C73/C681
Eagle Mountain Lake C75 138435554NV46565570374753444143504248261Eagle Mountain Lake C75
Parker County C761NANANANANANANANANV304250443937403842281Parker County C76
Cleburne Airport C77/C6821323740534847656049334347393637363444231Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3353946485041545249404252393636415056203Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021323542485040565349364047373535384044241Dallas Executive Airport C402
Greenville C1006/A1981293440404135504844454744373434375960221Greenville C1006/A198
Pilot Point C10321395861414039504947455446564847585154261Pilot Point C1032
Italy C1044/A3231283038433833474432NANANV293029373342151Italy C1044/A323
Corsicana Airport C10511304039474539524638NANANV39343236NV47181Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Longview C19/A127/C6442213245354136494141223036393426333839262Longview C19/A127/C644
Tyler Airport Relocated C821233042384335504339333839363430363539211Tyler Airport Relocated C82
Karnack C85/AFHP3031344739333422343538314029484447384945191Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X1512555052595150555954555250566358626053282El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591524549545048495649454146525854545150221Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1575251574646515747484649556457585554271Chamizal C41/AH126
Socorro Hueco C49/F312151475453464441514540384452455548455671Socorro Hueco C49/F312
Skyline Park C721545456575453546056515558616959636157331Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N5051NVNANANV000NVNANANANANANANV44413BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141525054554948465451464455585858555758231Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Waco Mazanec C10371283144423937464435303840313231413443161Waco Mazanec C1037
Temple Georgia C10451313245334145454927333736323333413743121Temple Georgia C1045
Killeen Skylark Field C10471343946354248475129394344403936384049181Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2142241192734413029403730232118NV454502Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412253448323147433228423939393632375745102West Orange C9/A141
Port Arthur West C28/A128/A2281161932304353413230333027232323253928111Port Arthur West C28/A128/A228
Hamshire C64/C65411822NV26445144322426362726262232643781Hamshire C64/C654
SETRPC Port Arthur C6281 N171733295253403632NV323224232425372791SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165411615303040443834NV232726212122223026131SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N253939332737483528392344393632394853101SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431182138324149453536443330252525254934101SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 11414281421NV412926382726202021NANV3581Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Austin Northwest C3/A322228314226364739451732373632322835394992Austin Northwest C3/A322
Audubon C381293443253546354015303636333229343742101Audubon C38
Fayette County C6012 N232125163940423421252525242422252631122Fayette County C601
Dripping Springs School C6141 N293239293847394524333638343230353937101Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N24262621344134401927302927282528273491CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N334150293446384620384343383631384045131CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 NNV34423139504248243437363233293337NVNA1Gorzycki Middle School C1603
Lockhart C16041 N26273023294238372128302926272426283491Lockhart C1604
St. Edwards University C16051 N26273226334535401827313026282528314061St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N313137353755434123313336313328323535101CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N25263729313733431926313029272632314381CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Houston East C1/G3162233247193843462118NV472633291933374052Houston East C1/G316
Houston Aldine C8/AF108/X150 2314947184740443224734443473729464347112Houston Aldine C8/AF108/X150
Channelview C15/AH115 323374915393839242649493239322738454783Channelview C15/AH115
Northwest Harris Co. C26/A110/X154227333015403639351544NV35312724322833112Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391232739213951433130383630302721293134111Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45120223220345240302934NVNANANANANV2325121Seabrook Friendship Park C45
Houston Bayland Park C53/A146 119243220435050302026312324212025283171Houston Bayland Park C53/A146
Conroe Relocated C78/A3211395638223433354325634150503927363138141Conroe Relocated C78/A321
Manvel Croix Park C84118202618415145312126252223231923202261Manvel Croix Park C84
Clinton C403/C304/AH113 32024342033454426NV32352527242024NANV53Clinton C403/C304/AH113
Houston North Wayside C405121313912353338221944422930252032343941Houston North Wayside C405
Houston Monroe C406117213120344839272125292424221823252891Houston Monroe C406
Lang C4082263536224840473218414133342922313134102Lang C408
Houston Croquet C409217202818385946302128312323212125262992Houston Croquet C409
Houston Westhollow C410125323424485153342033292624221924252991Houston Westhollow C410
Park Place C416119263724385547282533352829252027313691Park Place C416
Baytown Wetlands Center C5521 N913167172318131312201515131013161541Baytown Wetlands Center C552
Crosby Library C5531 N34485216303740312644564444393348484691Crosby Library C553
Tom Bass C5581 N12152310204233211317191519181517202271Tom Bass C558
Katy Park C5591 N9172415393834211325202119161413162141Katy Park C559
Atascocita C5601 N194133521202819948493739282039354021Atascocita C560
Meyer Park C5611 N19282210262225181221212119171218172051Meyer Park C561
Bunker Hill Village C5621 N19242914363738201428282323211722232771Bunker Hill Village C562
HRM-3 Haden Road C603/A114 1 N23334417354240242440432633272233364171HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N25384916434242322934573943332642495071Wallisville Road C617
Danciger C618 1 N14151812314437241317171515111414161751Danciger C618
Texas City 34th St. C620 1 N161627233548443323292523242221232020121Texas City 34th St. C620
UH Moody Tower C6951 N213041284553523329374332322724343842101UH Moody Tower C695
UH WG Jones Forest C6981 N365238203736374021653945483626353138131UH WG Jones Forest C698
UH West Liberty C6991 N3147451627283832234146NV41363144434361UH West Liberty C699
Lynchburg Ferry C1015/A165 1202839NANANANANANV344141382920NV404261Lynchburg Ferry C1015/A165
Lake Jackson C1016 1171624173050382921222018201818191819111Lake Jackson C1016
Baytown Garth C10171273950184442423330345840443428445751101Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831171538NVNV45443324222121191818181917171Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N1616302428473930202120NV232019201819NA1Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
San Antonio
San Antonio Northwest C232293337363848484725323737313127293740102San Antonio Northwest C23
Camp Bullis C58 131374537354542452936414135353033454791Camp Bullis C58
Calaveras Lake C59127283130385448432127293028282426293761Calaveras Lake C59
Elm Creek Elementary C5011 N28293132384750452528313329302627323461Elm Creek Elementary C501
Fair Oaks Ranch C5021 N33394732354741462938414337363133474691Fair Oaks Ranch C502
Bulverde Elementary C5031 N31344532334339422537414135333034435071Bulverde Elementary C503
New Braunfels Airport C5041 N24283128314539381930303227272326293371New Braunfels Airport C504
City of Garden Ridge C5051 N25283534334439412028293027272428334471City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N25263026334441391829293126272427293281Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N23272929344945391823262725252223263531Heritage Middle School C622
CPS Pecan Valley C6781 N26263130344742381527303026272325313751CPS Pecan Valley C678
Government Canyon C16101 N29333531384440462627333429292426333351Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C42202018262234452717202019192020201719122Corpus Christi West C4
Corpus Christi Tuloso C21118181626192541231519181618191818161891Corpus Christi Tuloso C21
Victoria C871NANV20302837413117NV2624232421232427111Victoria C87
Ingleside C6851 N201816262035402514181716171818181518141Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP1431202221262120322320232620182219202023111Mission C43/AP143
Harlingen Teege C10231212220241821312021212521202220202020121Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P2441NVNVNV291946443225253027272925273239131Laredo Vidaurri C44/AFGP144/P244
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.