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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
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2343949536050585659344441413738433946NV5048422Ft. Worth Northwest C13/AH302
Keller C172374451515646565363355051454140494452525452412Keller C17
Frisco C31/C6801425363454339525249506557524744546270727366511Frisco C31/C680
Midlothian OFW C52/A13712931374341NANANANV273240313031333241444544381Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571385360444340494754445250464545554552555853411Denton Airport South C56/A163/X157
Arlington Municipal Airport C611313541495343575450303843353334363844474949391Arlington Municipal Airport C61
Dallas North No.2 C63/C679138435144453750514847515543403947586561NVNANA1Dallas North No.2 C63/C679
Rockwall Heath C691283240343626464536423842312928335054505364551Rockwall Heath C69
Grapevine Fairway C70/A301/X1821374558484940525158NV5462474240504761605955451Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711303839424637554839364045373333343545464546401Kaufman C71/A304/X071
Granbury C73/C6811333439544851645946353844373536353442474747381Granbury C73/C681
Eagle Mountain Lake C75 138435554NV46565570374753444143504248535653371Eagle Mountain Lake C75
Parker County C761NANANANANANANANANV304250443937403842NV5152401Parker County C76
Cleburne Airport C77/C6821323740534847656049334347393637363444494948391Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3353946485041545249404252393636415056525458513Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021323542485040565349364047373535384044495050441Dallas Executive Airport C402
Greenville C1006/A1981293440404135504844454744373434375960576374461Greenville C1006/A198
Pilot Point C10321395861414039504947455446564847585154616357461Pilot Point C1032
Italy C1044/A3231283038433833474432NANANV293029373342474444321Italy C1044/A323
Corsicana Airport C10511304039474539524638NANANV39343236NV47474646371Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
12345678910111213141516171819202122
Tyler-Longview-Marshall
Longview C19/A127/C6442213245354136494141223036393426333839373842402Longview C19/A127/C644
Tyler Airport Relocated C821233042384335504339333839363430363539484443391Tyler Airport Relocated C82
Karnack C85/AFHP3031344739333422343538314029484447384945575961401Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
12345678910111213141516171819202122
El Paso-Juarez
El Paso UTEP C12/A125/X1512555052595150555954555250566358626053635674572El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591524549545048495649454146525854545150605063481Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1575251574646515747484649556457585554604971541Chamizal C41/AH126
Socorro Hueco C49/F3121514754534644415145403844524555484556555152391Socorro Hueco C49/F312
Skyline Park C721545456575453546056515558616959636157685571521Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N5051NVNANANV000NVNANANANANANANV44504644353BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141525054554948465451464455585858555758644860451Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Waco
Waco Mazanec C10371283144423937464435303840313231413443474546361Waco Mazanec C1037
Temple Georgia C10451313245334145454927333736323333413743484545321Temple Georgia C1045
Killeen Skylark Field C10471343946354248475129394344403936384049535252331Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2142241192734413029403730232118NV4545333044262Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412253448323147433228423939393632375745303343372West Orange C9/A141
Port Arthur West C28/A128/A2281161932304353413230333027232323253928252629321Port Arthur West C28/A128/A228
Hamshire C64/C65411822NV264451443224263627262622326437302635361Hamshire C64/C654
SETRPC Port Arthur C6281 N171733295253403632NV3232242324253727283030261SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165411615303040443834NV232726212122223026242531231SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N253939332737483528392344393632394853484959231SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431182138324149453536443330252525254934272833361SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 11414281421NV412926382726202021NANV35252531311Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Austin
Austin Northwest C3/A3222283142263647394517323736323228353949454441262Austin Northwest C3/A322
Audubon C381293443253546354015303636333229343742464441241Audubon C38
Fayette County C6012 N232125163940423421252525242422252631302929262Fayette County C601
Dripping Springs School C6141 N293239293847394524333638343230353937434340221Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N242626213441344019273029272825282734333333241CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N334150293446384620384343383631384045504945261CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 NNV34423139504248243437363233293337NVNV4441281Gorzycki Middle School C1603
Lockhart C16041 N262730232942383721283029262724262834343533221Lockhart C1604
St. Edwards University C16051 N262732263345354018273130262825283140353533261St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N313137353755434123313336313328323535393939291CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N252637293137334319263130292726323143373636251CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162233247193843462118NV4726332919333740343737222Houston East C1/G316
Houston Aldine C8/AF108/X150 2314947184740443224734443473729464347455648222Houston Aldine C8/AF108/X150
Channelview C15/AH115 3233749153938392426494932393227384547434747283Channelview C15/AH115
Northwest Harris Co. C26/A110/X154227333015403639351544NV35312724322833313630192Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391232739213951433130383630302721293134293131281Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45120223220345240302934NVNANANANANV2325272626201Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1192432204350503020263123242120252831262929201Houston Bayland Park C53/A146
Conroe Relocated C78/A3211395638223433354325634150503927363138354434211Conroe Relocated C78/A321
Manvel Croix Park C841182026184151453121262522232319232022212523191Manvel Croix Park C84
Clinton C403/C304/AH113 32024342033454426NV32352527242024NANV272931223Clinton C403/C304/AH113
Houston North Wayside C4051213139123533382219444229302520323439343637201Houston North Wayside C405
Houston Monroe C4061172131203448392721252924242218232528232527221Houston Monroe C406
Lang C4082263536224840473218414133342922313134323833192Lang C408
Houston Croquet C4092172028183859463021283123232121252629252728202Houston Croquet C409
Houston Westhollow C4101253234244851533420332926242219242529272627181Houston Westhollow C410
Park Place C4161192637243855472825333528292520273136313129211Park Place C416
Baytown Wetlands Center C5521 N9131671723181313122015151310131615151315121Baytown Wetlands Center C552
Crosby Library C5531 N344852163037403126445644443933484846555550261Crosby Library C553
La Porte Sylvan Beach C5561 NNANVNVNANANANANANANANANANANANANANANANANANANA1La Porte Sylvan Beach C556
Tom Bass C5581 N121523102042332113171915191815172022182118131Tom Bass C558
Katy Park C5591 N9172415393834211325202119161413162119221991Katy Park C559
Atascocita C5601 N1941335212028199484937392820393540374942121Atascocita C560
Meyer Park C5611 N192822102622251812212121191712181720192119111Meyer Park C561
Bunker Hill Village C5621 N192429143637382014282823232117222327252725151Bunker Hill Village C562
HRM-3 Haden Road C603/A114 1 N233344173542402424404326332722333641343838231HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N25384916434242322934573943332642495051NV48311Wallisville Road C617
Danciger C618 1 N141518123144372413171715151114141617171918131Danciger C618
Texas City 34th St. C620 1 N161627233548443323292523242221232020212322191Texas City 34th St. C620
UH Moody Tower C6951 N213041284553523329374332322724343842343638261UH Moody Tower C695
UH WG Jones Forest C6981 N365238203736374021653945483626353138354235201UH WG Jones Forest C698
UH West Liberty C6991 N3147451627283832234146NV413631444444485247251UH West Liberty C699
Lynchburg Ferry C1015/A165 1202839NANANANANANV344141382920NV4042403639271Lynchburg Ferry C1015/A165
Lake Jackson C1016 1171624173050382921222018201818191819192119171Lake Jackson C1016
Baytown Garth C10171273950184442423330345840443428445751514749341Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831171538NVNV45443324222121191818181917181920171Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N1616302428473930202120NV232019201819202220161Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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San Antonio
San Antonio Northwest C232293337363848484725323737313127293740434137262San Antonio Northwest C23
Camp Bullis C58 1313745373545424529364141353530334547504844291Camp Bullis C58
Calaveras Lake C591272831303854484321272930282824262937353533241Calaveras Lake C59
Elm Creek Elementary C5011 N282931323847504525283133293026273234373535231Elm Creek Elementary C501
Fair Oaks Ranch C5021 N333947323547414629384143373631334746514746241Fair Oaks Ranch C502
Bulverde Elementary C5031 N313445323343394225374141353330344350514844261Bulverde Elementary C503
New Braunfels Airport C5041 N242831283145393819303032272723262933343432231New Braunfels Airport C504
City of Garden Ridge C5051 N252835343344394120282930272724283344403934281City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N252630263344413918292931262724272932343433211Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N232729293449453918232627252522232635323229211Heritage Middle School C622
CPS Pecan Valley C6781 N262631303447423815273030262723253137373632251CPS Pecan Valley C678
Government Canyon C16101 N293335313844404626273334292924263333373635221Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
12345678910111213141516171819202122
Corpus Christi-Victoria
Corpus Christi West C4220201826223445271720201919202020171920NVNANA2Corpus Christi West C4
Corpus Christi Tuloso C211181816261925412315191816181918181618182018171Corpus Christi Tuloso C21
Victoria C871NANV20302837413117NV2624232421232427282927221Victoria C87
Ingleside C6851 N201816262035402514181716171818181518182020181Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP1431202221262120322320232620182219202023232020211Mission C43/AP143
Harlingen Teege C10231212220241821312021212521202220202020212223201Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441NVNVNV291946443225253027272925273239383732201Laredo 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.