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Peak Daily One-Hour Ozone Averages for August 2017

The table below lists the peak daily one-hour ozone concentrations measured in August 2017 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 SitePOCAugust 2017POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 26247658256426249627957424430333644374741422Ft. Worth Northwest C13/AH302
Keller C1726645638556435849537858474731373845395143442Keller C17
Frisco C31/C68017145589064424548408369645441484447616349491Frisco C31/C680
Midlothian OFW C52/A13717141706149376047416248354334403733553350391Midlothian OFW C52/A137
Denton Airport South C56/A163/X15716246548164425047447155504644484366424557491Denton Airport South C56/A163/X157
Arlington Municipal Airport C6117147876849366748506857434228363537514044381Arlington Municipal Airport C61
Dallas North No.2 C63/C67917147689159385442429071675836464138525847491Dallas North No.2 C63/C679
Rockwall Heath C6916941547258364742437374695938352738666340521Rockwall Heath C69
Grapevine Fairway C70/A301/X182172507510060375749488860625239393852415849481Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07115343515658354241285946383227332834423739491Kaufman C71/A304/X071
Granbury C73/C68115850606852406657765944374030303441373536371Granbury C73/C681
Eagle Mountain Lake C75 15842538958445447546846NANANA353552425243391Eagle Mountain Lake C75
Parker County C7616145546855435147585647393737323140333535381Parker County C76
Cleburne Airport C77/C68216349896855458968655951424334434439473946451Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 36948778456356247468062585731363230464437443Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402174446372483162383963614544294032NA504343451Dallas Executive Airport C402
Greenville C1006/A19815242516053343936335958423731292638485133441Greenville C1006/A198
Pilot Point C103215744526668424142406254454348534754394451571Pilot Point C1032
Italy C1044/A32316740495848314243295548353742403135413446451Italy C1044/A323
Corsicana Airport C105115350476052404345365842513629353034343952511Corsicana Airport C1051
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64425541675846273426263941403223242941423555502Longview C19/A127/C644
Tyler Airport Relocated C8215045655548284534304646443028263238313637411Tyler Airport Relocated C82
Karnack C85/AFHP303146434749453032232129414525323529403837NA491Karnack C85/AFHP303
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124758727450538352706149NANA54504886716248602El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159144546259NANA4946545037705262485063615454591Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14354666452557944605039625457495080645346611Chamizal C41/AH126
Socorro Hueco C49/F31213750525350625739403833604866525355433945341Socorro Hueco C49/F312
Skyline Park C7214958657052536951425346605652505270615549711Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N4553565353484445474334293840444444384734343BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414652575657566439413733674649454561514048471Ivanhoe C414
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Waco
Waco Mazanec C10371NANA445745353342325839363841333039363741451Waco Mazanec C1037
Temple Georgia C104517256607350474249466150454950433948463736551Temple Georgia C1045
Killeen Skylark Field C104716450576861414748466044524847454255423936481Killeen Skylark Field C1047
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 25546414747222127232627322119171918324144412Beaumont-Downtown C2/A112/C2002
West Orange C9/A14125041435842191622243326322421202122444042402West Orange C9/A141
Port Arthur West C28/A128/A22814946605540182124181923261917201916343432361Port Arthur West C28/A128/A228
Hamshire C64/C65414840475138212425222128252121202219223827351Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C165415046495141202229281825282519222022222634371SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C64315144485646212427272127282321222321374641371SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 14741445146212128262026262120202120335243381Nederland High School C1035
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Austin
Austin Northwest C3/A32228052617745314352524238383434313137464432442Austin Northwest C3/A322
Audubon C3817945566545313544474340403736323336464433441Audubon C38
Fayette County C6012 N7349566133284851502830302624252926302931512Fayette County C601
Dripping Springs School C6141 N8456638045334148574241444136333238424037431Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N6244585938293941443031332927262726273327381CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N6952586953374046485648484340393846595137431CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N6943516436273239403231322927272628364132351Gorzycki Middle School C1603
Lockhart C16041 N7460596434303748703033333227282931333441561Lockhart C1604
St. Edwards University C16051 N6850566237283949523030313026292727353230361St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N573NANANANA4054593131312824293326283332391CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N5853566343293947464535373431293030453329431CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31625143437433181848574142382527232624446564442Houston East C1/G316
Houston Aldine C8/AF108/X150 25645486745213153545551493539343040606167582Houston Aldine C8/AF108/X150
Channelview C15/AH115 34642406935191955584253482528232625605669393Channelview C15/AH115
Northwest Harris Co. C26/A110/X15426245545450263738383731352629272828603654702Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239151395081NANANANANA1532312224222522385541411Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45150417310936193450512932302424232123343534NA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 17052687635223440483033332425232224394935461Houston Bayland Park C53/A146
Conroe Relocated C78/A32115741425151263037314336444356354352463745451Conroe Relocated C78/A321
Manvel Croix Park C841604481752920NA39382420251922202318272833401Manvel Croix Park C84
Clinton C403/C304/AH113 35838506931201946543133322224192217366562443Clinton C403/C304/AH113
Houston North Wayside C40514439405633151843474043362324222024445458421Houston North Wayside C405
Houston Monroe C40614443576224182241432116231821192317263330421Houston Monroe C406
Lang C40825335506236193040383832342826242325405152462Lang C408
Houston Croquet C40926146727429222842442630272123212221303937402Houston Croquet C409
Houston Westhollow C41016747637334213534412925261720182217363637431Houston Westhollow C410
Park Place C41615248607532202547512730282223202318335248441Park Place C416
Sheldon C5511 N3229283627212130292630282317NANANANANANANA1Sheldon C551
Baytown Wetlands Center C5521 N342328471410622341013991010912172514191Baytown Wetlands Center C552
Crosby Library C5531 N5138414832262649535154603742353338535461431Crosby Library C553
La Porte Sylvan Beach C5561 N1917172214141627282124221919191819222322261La Porte Sylvan Beach C556
Mercer Arboretum C5571 N393429353526NANA293833363235323134413741381Mercer Arboretum C557
Tom Bass C5581 N50434566261823353923212418201921176NANANA1Tom Bass C558
Katy Park C5591 N54NANANANANANANANA1621201718182016272832411Katy Park C559
Atascocita C5601 N2519162717861717211925141815917475359391Atascocita C560
Meyer Park C5611 N4333363936162428293023261926202724344545491Meyer Park C561
Clear Brook High School C5701 N4738736428192940442323231922202419253031431Clear Brook High School C570
Clear Creek High School C5711 N4535677922172344431720222219181618223227361Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N5147507231201951613946422627252626496566541HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N46451725431193057684351532528262328545860401Wallisville Road C617
Danciger C618 1 N6741494223163233382018181616172019202523381Danciger C618
Texas City 34th St. C620 1 N5049659233253942562628292423232521313438461Texas City 34th St. C620
UH Moody Tower C6951 N62446337NANANA4852313231222511NA20356355461UH Moody Tower C695
U of H-Sugarland C6961 N7851777733253940412626242022202620294331431U of H-Sugarland C696
UH Coastal Center C6971 N4643587326213438472426221919202016242534381UH Coastal Center C697
UH WG Jones Forest C6981 N5646455155263140324236543541324037524152521UH WG Jones Forest C698
UH West Liberty C6991 N5439374339232542424549503242362639514139361UH West Liberty C699
Lake Jackson C1016 15140344324173533371815181719182216171727401Lake Jackson C1016
Baytown Garth C101714646405531212754NA3656563233232530586061421Baytown Garth C1017
Galveston 99th St. C1034/A320/X18315744576133213632462221191918182018222439431Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N4547424626233033441817191818192217191924391Oyster Creek C1607
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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San Antonio
San Antonio Northwest C2328360818439356153633638373631333232464433522San Antonio Northwest C23
Camp Bullis C58 17957608344365347504245424138353637514733491Camp Bullis C58
Calaveras Lake C5915977596632304357582828312733322826293029421Calaveras Lake C59
Elm Creek Elementary C5011 N7974685435325356672927312824282726313126401Elm Creek Elementary C501
Fair Oaks Ranch C5021 N6851568043364645514145444238363638524838481Fair Oaks Ranch C502
Bulverde Elementary C5031 N6854577544375044544546474139373739504733461Bulverde Elementary C503
New Braunfels Airport C5041 N6056516033292456602826312825262726283229371New Braunfels Airport C504
City of Garden Ridge C5051 N7062616832294947553334373330252727393428401City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N5957515530274345572625312625252624283028351Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N5873586128254154542424282430272423262525371Heritage Middle School C622
CPS Pecan Valley C6781 N6273636633294355582931322630262525362824371CPS Pecan Valley C678
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C426347282821212224272122211917202418211917292Corpus Christi West C4
Corpus Christi Tuloso C2114955303822242435302422262118222619232220331Corpus Christi Tuloso C21
Victoria C8716258474923224548452626262120212419282726371Victoria C87
Inez C6091 N6448454524233847432425252121222521262629381Inez C609
Holly Road C6601 N6853262723212027302422202023NANANANANANANA1Holly Road C660
Violet C6641 N6540343425252831412725252018202219221415241Violet C664
Ingleside C6851 N6043302519181924252318191917182217191718321Ingleside C685
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14314641353424252748252430332522202621272523301Mission C43/AP143
Brownsville C80/AGP18011918172218181637221715181516172516191614221Brownsville C80/AGP180
Harlingen Teege C102313729253822232228232125282020202822312821241Harlingen Teege C1023
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24415443283126273041222726302524252423242318271Laredo 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

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.