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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
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23638353344594761594332172946606768542Ft. Worth Northwest C13/AH302
Keller C1723538363345514363564227162746657860492Keller C17
Frisco C31/C68014043434459494374675132162339655176401Frisco C31/C680
Midlothian OFW C52/A13713437403344685454574250162836434239381Midlothian OFW C52/A137
Denton Airport South C56/A163/X15714252423961464472704623162845756263371Denton Airport South C56/A163/X157
Arlington Municipal Airport C6113233383140675152564040132640555942441Arlington Municipal Airport C61
Dallas North No.2 C63/C67913839404046594461604434142343585962351Dallas North No.2 C63/C679
Rockwall Heath C6914439454755484565664234192240515755391Rockwall Heath C69
Grapevine Fairway C70/A301/X18213643583752554668704536182647747671471Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07113839404350464757613940271838364342351Kaufman C71/A304/X071
Granbury C73/C68113739323236424752534440183342454942441Granbury C73/C681
Eagle Mountain Lake C75 13238313044453851523921172646607347431Eagle Mountain Lake C75
Parker County C7613134282732444048473717153044555640421Parker County C76
Cleburne Airport C77/C68213637383442495956624852163136485041441Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3363437404574486157423515254961NA23443Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40213640414048775553574542132243505244391Dallas Executive Airport C402
Greenville C1006/A19813939384652433656635126251940465545371Greenville C1006/A198
Pilot Point C103214347454467494178735524182938674962381Pilot Point C1032
Italy C1044/A32313440423548455651533653152430434140341Italy C1044/A323
Corsicana Airport C105114043475050474961593931352136384348371Corsicana Airport C1051
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Longview C19/A127/C64422931304044584777513429212246414460522Longview C19/A127/C644
Tyler Airport Relocated C8213331263243514847483441272338434738391Tyler Airport Relocated C82
Karnack C85/AFHP30312838334249453449453437232134343144351Karnack C85/AFHP303
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X15124762733636342948333934413433253443322El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15914457533032292843283935363028222736251Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14856643234292644NANA23372929212338281Chamizal C41/AH126
Socorro Hueco C49/F31215366443439303137364740402929243235281Socorro Hueco C49/F312
Skyline Park C7214463703836322856393838403330272936291Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N28262018166640404337342422273339353BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414454462830252439323729NANANA172229231Ivanhoe C414
Cd Juarez Delphi C6631 N33513924282323302122NANANANANANANANA1Cd Juarez Delphi C663
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Waco Mazanec C103713737353344434959533346222334384441291Waco Mazanec C1037
Temple Georgia C104513937343141405563574454332739464842311Temple Georgia C1045
Killeen Skylark Field C104714138353341455163675150392841505347361Killeen Skylark Field C1047
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23327313637375852531933351723573125212Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122827283627344240552237351724473233302West Orange C9/A141
Port Arthur West C28/A128/A22812927343429326262521927281827362623221Port Arthur West C28/A128/A228
Hamshire C64/C65412726242124324454472025322232382519221Hamshire C64/C654
SETRPC Port Arthur C6281 N3024242923275858511926261922322218211SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165413128293027295548442226302636332424241SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N2728303632423236612744311421543226261SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64313132353632377265552732352027483332321SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 13028313832375853552233351924433126221Nederland High School C1035
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Austin Northwest C3/A32223737302738435168493537431432414045472Austin Northwest C3/A322
Audubon C3813942353143454771524044391735514849461Audubon C38
Fayette County C6012 N3131312734365054413133342032483536332Fayette County C601
Dripping Springs School C6141 N3637322939404560473935382030504741361Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N2826252328294348412831281427363032361CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N3838323142454270564349422137444548391CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N2928242129323949382929361326443534321Gorzycki Middle School C1603
Lockhart C16041 N3534302436395255423338341733453934311Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N3231262733304246402529371328403729271CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N2624232225273742352525311422283226281CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Houston East C1/G31623226333230523959522447191521433820152Houston East C1/G316
Houston Aldine C8/AF108/X150 23327333040463851572352181824363925152Houston Aldine C8/AF108/X150
Channelview C15/AH115 32524232630653448582349211722403420113Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423736493755453960542755302329464533222Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23912925293027434270492034231623443421161Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4512726252728354860531629261828493120181Seabrook Friendship Park C45
Houston Bayland Park C53/A146 12525263032444695381833252132643624211Houston Bayland Park C53/A146
Conroe Relocated C78/A32114948445141574245864565292430383334201Conroe Relocated C78/A321
Manvel Croix Park C8412625242725253885291723351930472523191Manvel Croix Park C84
Clinton C403/C304/AH113 32719262828483862391835221925502717133Clinton C403/C304/AH113
Houston North Wayside C40513127342735574452492048161927403724131Houston North Wayside C405
Houston Monroe C40612122262224263881372026251723472819141Houston Monroe C406
Lang C40822827343037544569532653282127473423152Lang C408
Houston Croquet C40922727262729364693391932332231743425222Houston Croquet C409
Houston Westhollow C41012628272832353788412344322530623624241Houston Westhollow C410
Houston Texas Avenue C41112423282928454662411933161927472819151Houston Texas Avenue C411
Park Place C41612526322630424780442131201823553115151Park Place C416
Sheldon C5511 NNANANANANANANANA562752221721343123141Sheldon C551
Baytown Wetlands Center C5521 N2520222524352958521534251522402719141Baytown Wetlands Center C552
Crosby Library C5531 N2528252629443537722857211520362923151Crosby Library C553
West Houston C5541 NNANANANANANANANANA2229262022262916181West Houston C554
La Porte Sylvan Beach C5561 NNANANANANANANANANA1625281623422520181La Porte Sylvan Beach C556
Mercer Arboretum C5571 N3333394444433346663156231923342824161Mercer Arboretum C557
Tom Bass C5581 N1516171617183072261219211220442215131Tom Bass C558
Katy Park C5591 N3129283032313878372238372328514428271Katy Park C559
Atascocita C5601 N3230313236463433682847191622333227161Atascocita C560
Meyer Park C5611 N3334453955463859593563292229404327221Meyer Park C561
Bunker Hill Village C5621 N2428262831433773422542292229483720171Bunker Hill Village C562
Huffman Wolf Road C5631 N192218202326222661264315101423191571Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N3127303033663857542445221723525125151HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3232283128553962732361301927473728201Wallisville Road C617
Danciger C618 1 N2425232221322553271723253133532922161Danciger C618
Mustang Bayou C619 1 N2525262522313766381727322436482822181Mustang Bayou C619
Texas City 34th St. C620 1 N2525262421243455351618231621422518171Texas City 34th St. C620
UH Moody Tower C6951 N2930373334535091522438232333623520181UH Moody Tower C695
U of H-Sugarland C6961 N2725222428303383302030332533693224181U of H-Sugarland C696
UH Coastal Center C6971 N2626282623244273421824322030522621221UH Coastal Center C697
UH WG Jones Forest C6981 N4444405248474145774368352329393531181UH WG Jones Forest C698
UH West Liberty C6991 N3033273233354040833863291923393427191UH West Liberty C699
Lynchburg Ferry C1015/A165 12425232626593051562140221620402422151Lynchburg Ferry C1015/A165
Lake Jackson C1016 12625242221292667231721263143432621171Lake Jackson C1016
Baytown Garth C101712930262927513656682255281825473625191Baytown Garth C1017
Galveston 99th St. C1034/A320/X18313130303429314379542529402631463029251Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
San Antonio
San Antonio Northwest C2323638332744495059473641462235584639422San Antonio Northwest C23
Camp Bullis C5814042342946564366504247392034574646491Camp Bullis C58
Calaveras Lake C5913433262336414256393135302039533743311Calaveras Lake C59
Elm Creek Elementary C5011 N3333282739354948393030462148433637291Elm Creek Elementary C501
Fair Oaks Ranch C5021 N3538312741483361473740301626413736421Fair Oaks Ranch C502
Bulverde Elementary C5031 N4038302747543573524742401931434046421Bulverde Elementary C503
New Braunfels Airport C5041 N3633302639445350443237341735493538301New Braunfels Airport C504
City of Garden Ridge C5051 N2825211932343743352828321727392830221City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N3734312640424752453236311535503739291Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N3633272540414460413137372139503841321Heritage Middle School C622
CPS Pecan Valley C6781 N3835292736NANA49433433372048433843371CPS Pecan Valley C678
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C422729292223293635262227313236553626222Corpus Christi West C4
Corpus Christi Tuloso C2112528261921253441232125312935472827201Corpus Christi Tuloso C21
Victoria C8712729262125323353322429282830463234241Victoria C87
Inez C6091 N2426272323232939232121313229482729211Inez C609
Coleto C6241 N2022201719222645252019241725382425211Coleto C624
Aransas Pass C6591 N2327231918272422201821252732492720181Aransas Pass C659
Holly Road C6601 N2629282122273028222126302831463020181Holly Road C660
Violet C6641 N2325261718253028201720282735462626161Violet C664
Ingleside C6851 N2428241921262420232022252830422722191Ingleside C685
Odem C6861 N2728252026293141262227282933422927211Odem C686
Taft C6871 N2831282324343529292427333438493331241Taft C687
Cuero C16021 N2931282030334050342935301936443130301Cuero C1602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP14313231302020222927222024352531344222171Mission C43/AP143
Brownsville C80/AGP18012528311816192519202022262525302919181Brownsville C80/AGP180
Harlingen Teege C102312829332425273045272429272731373621191Harlingen Teege C1023
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P2441NANA142322272825242527202326393325211Laredo 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.