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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
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 26247658256426249627957424430333644372Ft. Worth Northwest C13/AH302
Keller C1726645638556435849537858474731373845392Keller C17
Frisco C31/C68017145589064424548408369645441484447611Frisco C31/C680
Midlothian OFW C52/A13717141706149376047416248354334403733551Midlothian OFW C52/A137
Denton Airport South C56/A163/X15716246548164425047447155504644484366421Denton Airport South C56/A163/X157
Arlington Municipal Airport C6117147876849366748506857434228363537511Arlington Municipal Airport C61
Dallas North No.2 C63/C67917147689159385442429071675836464138521Dallas North No.2 C63/C679
Rockwall Heath C6916941547258364742437374695938352738661Rockwall Heath C69
Grapevine Fairway C70/A301/X182172507510060375749488860625239393852411Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07115343515658354241285946383227332834421Kaufman C71/A304/X071
Granbury C73/C68115850606852406657765944374030303441371Granbury C73/C681
Eagle Mountain Lake C75 15842538958445447546846NANANA353552421Eagle Mountain Lake C75
Parker County C7616145546855435147585647393737323140331Parker County C76
Cleburne Airport C77/C68216349896855458968655951424334434439471Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 36948778456356247468062585731363230463Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402174446372483162383963614544294032NA501Dallas Executive Airport C402
Greenville C1006/A19815242516053343936335958423731292638481Greenville C1006/A198
Pilot Point C103215744526668424142406254454348534754391Pilot Point C1032
Italy C1044/A32316740495848314243295548353742403135411Italy C1044/A323
Corsicana Airport C105115350476052404345365842513629353034341Corsicana Airport C1051
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Longview C19/A127/C64425541675846273426263941403223242941422Longview C19/A127/C644
Tyler Airport Relocated C8215045655548284534304646443028263238311Tyler Airport Relocated C82
Karnack C85/AFHP30314643474945303223212941452532352940381Karnack C85/AFHP303
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X15124758727450538352706149NANA54504886712El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159144546259NANA4946545037705262485063611Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14354666452557944605039625457495080641Chamizal C41/AH126
Socorro Hueco C49/F31213750525350625739403833604866525355431Socorro Hueco C49/F312
Skyline Park C7214958657052536951425346605652505270611Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N4553565353484445474334293840444444383BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414652575657566439413733674649454561511Ivanhoe C414
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Waco Mazanec C10371NANA445745353342325839363841333039361Waco Mazanec C1037
Temple Georgia C104517256607350474249466150454950433948461Temple Georgia C1045
Killeen Skylark Field C104716450576861414748466044524847454255421Killeen Skylark Field C1047
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 25546414747222127232627322119171918322Beaumont-Downtown C2/A112/C2002
West Orange C9/A14125041435842191622243326322421202122442West Orange C9/A141
Port Arthur West C28/A128/A22814946605540182124181923261917201916341Port Arthur West C28/A128/A228
Hamshire C64/C65414840475138212425222128252121202219221Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C165415046495141202229281825282519222022221SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C64315144485646212427272127282321222321371SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 14741445146212128262026262120202120331Nederland High School C1035
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Austin Northwest C3/A32228052617745314352524238383434313137462Austin Northwest C3/A322
Audubon C3817945566545313544474340403736323336461Audubon C38
Fayette County C6012 N7349566133284851502830302624252926302Fayette County C601
Dripping Springs School C6141 N8456638045334148574241444136333238421Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N6244585938293941443031332927262726271CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N6952586953374046485648484340393846591CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N6943516436273239403231322927272628361Gorzycki Middle School C1603
Lockhart C16041 N7460596434303748703033333227282931331Lockhart C1604
St. Edwards University C16051 N6850566237283949523030313026292727351St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N573NANANANA4054593131312824293326281CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N5853566343293947464535373431293030451CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Houston East C1/G31625143437433181848574142382527232624442Houston East C1/G316
Houston Aldine C8/AF108/X150 25645486745213153545551493539343040602Houston Aldine C8/AF108/X150
Channelview C15/AH115 34642406935191955584253482528232625603Channelview C15/AH115
Northwest Harris Co. C26/A110/X15426245545450263738383731352629272828602Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239151395081NANANANANA1532312224222522381Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45150417310936193450512932302424232123341Seabrook Friendship Park C45
Houston Bayland Park C53/A146 17052687635223440483033332425232224391Houston Bayland Park C53/A146
Conroe Relocated C78/A32115741425151263037314336444356354352461Conroe Relocated C78/A321
Manvel Croix Park C841604481752920NA39382420251922202318271Manvel Croix Park C84
Clinton C403/C304/AH113 35838506931201946543133322224192217363Clinton C403/C304/AH113
Houston North Wayside C40514439405633151843474043362324222024441Houston North Wayside C405
Houston Monroe C40614443576224182241432116231821192317261Houston Monroe C406
Lang C40825335506236193040383832342826242325402Lang C408
Houston Croquet C40926146727429222842442630272123212221302Houston Croquet C409
Houston Westhollow C41016747637334213534412925261720182217361Houston Westhollow C410
Park Place C41615248607532202547512730282223202318331Park Place C416
Sheldon C5511 N3229283627212130292630282317NANANANA1Sheldon C551
Baytown Wetlands Center C5521 N342328471410622341013991010912171Baytown Wetlands Center C552
Crosby Library C5531 N5138414832262649535154603742353338NA1Crosby Library C553
La Porte Sylvan Beach C5561 N1917172214141627282124221919191819221La Porte Sylvan Beach C556
Mercer Arboretum C5571 N393429353526NANA293833363235323134411Mercer Arboretum C557
Tom Bass C5581 N504345662618233539232124182019211761Tom Bass C558
Katy Park C5591 N54NANANANANANANANA1621201718182016271Katy Park C559
Atascocita C5601 N2519162717861717211925141815917471Atascocita C560
Meyer Park C5611 N4333363936162428293023261926202724341Meyer Park C561
Clear Brook High School C5701 N4738736428192940442323231922202420231Clear Brook High School C570
Clear Creek High School C5711 N4535677922172344431720222219181618221Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N5147507231201951613946422627252626491HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N46451725431193057684351532528262328541Wallisville Road C617
Danciger C618 1 N6741494223163233382018181616172019201Danciger C618
Texas City 34th St. C620 1 N5049659233253942562628292423232521311Texas City 34th St. C620
UH Moody Tower C6951 N62446337NANANA4852313231222511NA20341UH Moody Tower C695
U of H-Sugarland C6961 N7851777733253940412626242022202620301U of H-Sugarland C696
UH Coastal Center C6971 N4643587326213438472426221919202016181UH Coastal Center C697
UH WG Jones Forest C6981 N5646455155263140324236543541324037361UH WG Jones Forest C698
UH West Liberty C6991 N5439374339232542424549503242362625NA1UH West Liberty C699
Lake Jackson C1016 15140344324173533371815181719182216171Lake Jackson C1016
Baytown Garth C101714646405531212754NA3656563233232530581Baytown Garth C1017
Galveston 99th St. C1034/A320/X18315744576133213632462221191918182018221Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N4547424626233033441817191818192217191Oyster Creek C1607
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
San Antonio
San Antonio Northwest C2328360818439356153633638373631333232462San Antonio Northwest C23
Camp Bullis C58 17957608344365347504245424138353637511Camp Bullis C58
Calaveras Lake C5915977596632304357582828312733322826291Calaveras Lake C59
Elm Creek Elementary C5011 N7974685435325356672927312824282726311Elm Creek Elementary C501
Fair Oaks Ranch C5021 N6851568043364645514145444238363638521Fair Oaks Ranch C502
Bulverde Elementary C5031 N6854577544375044544546474139373739501Bulverde Elementary C503
New Braunfels Airport C5041 N6056516033292456602826312825262726281New Braunfels Airport C504
City of Garden Ridge C5051 N7062616832294947553334373330252727391City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N5957515530274345572625312625252624281Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N5873586128254154542424282430272423261Heritage Middle School C622
CPS Pecan Valley C6781 N6273636633294355582931322630262525361CPS Pecan Valley C678
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C426347282821212224272122211917202418212Corpus Christi West C4
Corpus Christi Tuloso C2114955303822242435302422262118222619231Corpus Christi Tuloso C21
Victoria C8716258474923224548452626262120212419281Victoria C87
Inez C6091 N6448454524233847432425252121222521261Inez C609
Holly Road C6601 N6853262723212027302422202023NANANANA1Holly Road C660
Violet C6641 N6540343425252831412725252018202219221Violet C664
Ingleside C6851 N6043302519181924252318191917182217191Ingleside C685
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP14314641353424252748252430332522202621271Mission C43/AP143
Brownsville C80/AGP18011918172218181637221715181516172516191Brownsville C80/AGP180
Harlingen Teege C102313729253822232228232125282020202822311Harlingen Teege C1023
AreaMonitoring SitePOCAugust 2017POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P24415443283126273041222726302524252423241Laredo 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.