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Peak Daily One-Hour Ozone Averages for September 2014

The table below lists the peak daily one-hour ozone concentrations measured in September 2014 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 SitePOCSeptember 2014POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23637353344594761594332172946606768544051756179838486686156492Ft. Worth Northwest C13/AH302
Keller C1723538363345514363564227162746657860494050755278848885675750462Keller C17
Frisco C31/C68014043434459494374675132162339655176404653604858696864595240501Frisco C31/C680
Midlothian OFW C52/A13713437403344685454574250162836434239383350485752625954544645371Midlothian OFW C52/A137
Denton Airport South C56/A163/X15714252423961464472704623162845756263374759634773847985725742511Denton Airport South C56/A163/X157
Arlington Municipal Airport C6113233383140675152564040132640555942443246565766616765585149351Arlington Municipal Airport C61
Dallas North No.2 C63/C679138394040465944616044341423435859623542486743616768625850NANA1Dallas North No.2 C63/C679
Rockwall Heath C6914439454755484565664234192240515755395053564855627061585339401Rockwall Heath C69
Grapevine Fairway C70/A301/X18213643583752554668704536182647747671474253755084847879665844441Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07113839404350464757613940271838364342354447514952566861554936381Kaufman C71/A304/X071
Granbury C73/C68113739323236424752534440183342454942444245567658646462615967NA1Granbury C73/C681
Eagle Mountain Lake C75 13238313044453851523921172646607347433850654878869288675550471Eagle Mountain Lake C75
Parker County C7613134282732444048473717153044555640424143665668828684726353471Parker County C76
Cleburne Airport C77/C68213637383442495956624852163136485041443747537558686562595558511Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 336343740457448615742351525496158614437477357NANA6472645244383Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40213640414048775553574542132243505244393442615063606362554842371Dallas Executive Airport C402
Greenville C1006/A19813939384652433656635126251940465545374752504358626164564735361Greenville C1006/A198
Pilot Point C103214347454467494178735524182938674962384752554757696663645141571Pilot Point C1032
Italy C1044/A32313440423548455651533653152430434140343648514951685951565039371Italy C1044/A323
Corsicana Airport C105114043475050474961593931352136384348373350504854616159595043391Corsicana Airport C1051
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64422931304044584777513429212246414460525157594557666058594132332Longview C19/A127/C644
Tyler Airport Relocated C821333126324351484748344127233843473839NANANA5470656576664935341Tyler Airport Relocated C82
Karnack C85/AFHP30312838334249453449453437232134343144353954624051635755473931431Karnack C85/AFHP303
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124762733636342948333934413433253443322965402659505664585941322El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15914457533032292843283935363028222736252962342541425054495635391Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14856643234292644NANA23372929212338283165352648455057526041431Chamizal C41/AH126
Socorro Hueco C49/F31215366443439303137364740402929243235283981323142434953495234341Socorro Hueco C49/F312
Skyline Park C7214463703836322856393838403330272936293052343156465260485152451Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N28262018166640404337342422273339353635315051475351403644373BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414454462830252439323729NANANA172229233347262137343942354728NA1Ivanhoe C414
Cd Juarez Delphi C6631 N335139242823233021302529232217202623NANANANANANANANA163825201Cd Juarez Delphi C663
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Waco
Waco Mazanec C103713737353344434959533346222334384441293861604856725455565346431Waco Mazanec C1037
Temple Georgia C104513937343141405563574454332739464842314150615961655559605159501Temple Georgia C1045
Killeen Skylark Field C104714138353341455163675150392841505347364544605765686063615857611Killeen Skylark Field C1047
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23327313637375852531933351723573125213046523650694767403429402Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122827283627344240552237351724473233303247513955675164433026402West Orange C9/A141
Port Arthur West C28/A128/A22812927343429326262521927281827362623223343584261494756563534391Port Arthur West C28/A128/A228
Hamshire C64/C65412726242124324454472025322232382519222445554562534454523837371Hamshire C64/C654
SETRPC Port Arthur C6281 N3024242923275858511926261922322218212636514055414145383730331SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165413128293027295548442226302636332424243244655355463451373133371SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N27283036324232366127443114215432262630464432436342NANANA12211SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64313132353632377265552732352027483332323650665072605865613933411SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 13028313832375853552233351924433126223343554058645063463531391Nederland High School C1035
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Austin
Austin Northwest C3/A32223737302738435168493537431432414045473333546355565055494549652Austin Northwest C3/A322
Audubon C3813942353143454771524044391735514849463733526464655758545254701Audubon C38
Fayette County C6012 N3131312734365054413133342032483536332843505950584870523951522Fayette County C601
Dripping Springs School C6141 N3637322939404560473935382030504741363036526168755756484956601Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N2826252328294348412831281427363032362428434842443644383237381CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N3838323142454270564349422137444548393537535654555155525253691CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N2928242129323949382929361326443534322628465358594649434350521Gorzycki Middle School C1603
Lockhart C16041 N3534302436395255423338341733453934312538505554544849483945511Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N3231262733304246402529371328403729272030405552574646434149481CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N2624232225273742352525311422283226282629312728191620191722201CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31623226333230523959522447191521433820153044524141633161453823472Houston East C1/G316
Houston Aldine C8/AF108/X150 233273330404638515723521818243639251535444855NANANANANANANA602Houston Aldine C8/AF108/X150
Channelview C15/AH115 32524232630653448582349211722403420112441474240623460423525343Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423736493755453960542755302329464533223647505648594458473537842Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23912925293027434270492034231623443421162541555152603651494231401Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4512726252728354860531629261828493120183545587459574057554038381Seabrook Friendship Park C45
Houston Bayland Park C53/A146 12525263032444695381833252132643624213255697152703964554642531Houston Bayland Park C53/A146
Conroe Relocated C78/A32114948445141574245864565292430383334203741504243564351433434421Conroe Relocated C78/A321
Manvel Croix Park C8412625242725253885291723351930472523192341637070734049524043401Manvel Croix Park C84
Clinton C403/C304/AH113 32719262828483862391835221925502717133444524846644060473727443Clinton C403/C304/AH113
Houston North Wayside C40513127342735574452492048161927403724132748504943593554423727541Houston North Wayside C405
Houston Monroe C40612122262224263881372026251723472819142741575552693450473631371Houston Monroe C406
Lang C40822827343037544569532653282127473423152752526746584257444139582Lang C408
Houston Croquet C40922727262729364693391932332231743425223246717456814055534740492Houston Croquet C409
Houston Westhollow C41012628272832353788412344322530623624243157596656664270495345511Houston Westhollow C410
Houston Texas Avenue C41112423282928454662411933161927472819153247506043593557473931461Houston Texas Avenue C411
Park Place C41612526322630424780442131201823553115153245605548703755504330441Park Place C416
Sheldon C5511 NNANANANANANANANA562752221721343123142840443541543251373224401Sheldon C551
Baytown Wetlands Center C5521 N2520222524352958521534251522402719142038504044553349463827311Baytown Wetlands Center C552
Crosby Library C5531 N2528252629443537722857211520362923152342453140583353353122371Crosby Library C553
West Houston C5541 NNANANANANANANANANA2229262022262916182236402334413646283123281West Houston C554
La Porte Sylvan Beach C5561 NNANANANANANANANANA1625281623422520182238495245493449463731331La Porte Sylvan Beach C556
Mercer Arboretum C5571 N3333394444433346663156231923342824162846424438483946393031521Mercer Arboretum C557
Tom Bass C5581 N1516171617183072261219211220442215132136545051643042423131341Tom Bass C558
Katy Park C5591 N3129283032313878372238372328514428273054565755664378504041701Katy Park C559
Atascocita C5601 N3230313236463433682847191622333227162844403435553943362923421Atascocita C560
Meyer Park C5611 N3334453955463859593563292229404327223548475843534351423434661Meyer Park C561
Bunker Hill Village C5621 N2428262831433773422542292229483720172347526548574164444340511Bunker Hill Village C562
Huffman Wolf Road C5631 N192218202326222661264315101423191571636332226352636252015261Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N3127303033663857542445221723525125153445544646673963493926481HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3232283128553962732361301927473728202649574850723965514229391Wallisville Road C617
Danciger C618 1 N2425232221322553271723253133532922162440538679654253413751371Danciger C618
Mustang Bayou C619 1 N2525262522313766381727322436482822183245496955643552414140381Mustang Bayou C619
Texas City 34th St. C620 1 N2525262421243455351618231621422518172741394258523245383536341Texas City 34th St. C620
UH Moody Tower C6951 N2930373334535091522438232333623520183355667155764469574935521UH Moody Tower C695
U of H-Sugarland C6961 N2725222428303383302030332533693224182146726960854054564646471U of H-Sugarland C696
UH Coastal Center C6971 N2626282623244273421824322030522621222645475361583448403940391UH Coastal Center C697
UH WG Jones Forest C6981 N4444405248474145774368352329393531183741494343554148443533511UH WG Jones Forest C698
UH West Liberty C6991 N3033273233354040833863291923393427192556503643594258413527411UH West Liberty C699
Lynchburg Ferry C1015/A165 12425232626593051562140221620402422152260433740583557453523351Lynchburg Ferry C1015/A165
Lake Jackson C1016 12625242221292667231721263143432621172344496462623754414153381Lake Jackson C1016
Baytown Garth C101712930262927513656682255281825473625192645514246663661473927381Baytown Garth C1017
Galveston 99th St. C1034/A320/X18313130303429314379542529402631463029254153545562654860504750441Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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San Antonio
San Antonio Northwest C2323638332744495059473641462235584639423735546777766054504855732San Antonio Northwest C23
Camp Bullis C5814042342946564366504247392034574646493636587074776356465255831Camp Bullis C58
Calaveras Lake C5913433262336414256393135302039533743313334546659626050474852581Calaveras Lake C59
Elm Creek Elementary C5011 N3333282739354948393030462148433637293838496868675843455267541Elm Creek Elementary C501
Fair Oaks Ranch C5021 N3538312741483361473740301626413736422930455254655143414048771Fair Oaks Ranch C502
Bulverde Elementary C5031 N4038302747543573524742401931434046423231526664725949404649681Bulverde Elementary C503
New Braunfels Airport C5041 N3633302639445350443237341735493538302431496256595047444454581New Braunfels Airport C504
City of Garden Ridge C5051 N2825211932343743352828321727392830221822375751514338343861571City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N3734312640424752453236311535503739293036546156615254434546501Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N3633272540414460413137372139503841323234526866635650485054591Heritage Middle School C622
CPS Pecan Valley C6781 N3835292736NANA49433433372048433843373235525962635347454564561CPS Pecan Valley C678
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C422729292223293635262227313236553626223136526062685650464145382Corpus Christi West C4
Corpus Christi Tuloso C2112528261921253441232125312935472827203030425463624744433844361Corpus Christi Tuloso C21
Victoria C8712729262125323353322429282830463234242637545467645446454443431Victoria C87
Inez C6091 N242627232323293923212131322948272921243440NA67565051464039351Inez C609
Coleto C6241 N2022201719222645252019241725382425211830454660615242433436371Coleto C624
Aransas Pass C6591 N2327231918272422201821252732492720182335466158655446454247321Aransas Pass C659
Holly Road C6601 N2629282122273028222126302831463020182837526061615143403640311Holly Road C660
Violet C6641 N2325261718253028201720282735462626162325435559624943443842341Violet C664
Ingleside C6851 N2428241921262420232022252830422722192434424955574742434043301Ingleside C685
Odem C6861 N2728252026293141262227282933422927213029415058584645443742331Odem C686
Taft C6871 N2831282324343529292427333438493331243835485969665251504352391Taft C687
Cuero C16021 N2931282030334050342935301936443130302440656558775750484348451Cuero C1602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14313231302020222927222024352531344222172520273642454136333730471Mission C43/AP143
Brownsville C80/AGP18012528311816192519202022262525302919182418283945494242364029351Brownsville C80/AGP180
Harlingen Teege C102312829332425273045272429272731373621192619334747524941384128NA1Harlingen Teege C1023
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P2441NANA14232227282524252720232639332521212032NA34496325385350411Laredo 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 - 0.059
51 - 100 Not Defined 0.06 - 0.075
101 - 150 0.125 - 0.164 0.076 - 0.095
151 - 200 0.165 - 0.204 0.096 - 0.115
201 - 300 0.205 - 0.404 0.116 - 0.374
301 - 400 0.405 - 0.504 Not Defined
401 - 500 0.505 - 0.604 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 beginning 1/1/2013, 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.