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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 2363835334459476159433217294660672Ft. Worth Northwest C13/AH302
Keller C172353836334551436356422716274665782Keller C17
Frisco C31/C6801404343445949437467513216233965511Frisco C31/C680
Midlothian OFW C52/A1371343740334468545457425016283643421Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571425242396146447270462316284575621Denton Airport South C56/A163/X157
Arlington Municipal Airport C611323338314067515256404013264055591Arlington Municipal Airport C61
Dallas North No.2 C63/C6791383940404659446160443414234358591Dallas North No.2 C63/C679
Rockwall Heath C691443945475548456566423419224051571Rockwall Heath C69
Grapevine Fairway C70/A301/X1821364358375255466870453618264774761Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711383940435046475761394027183836431Kaufman C71/A304/X071
Granbury C73/C6811373932323642475253444018334245491Granbury C73/C681
Eagle Mountain Lake C75 1323831304445385152392117264660731Eagle Mountain Lake C75
Parker County C761313428273244404847371715304455561Parker County C76
Cleburne Airport C77/C6821363738344249595662485216313648501Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3363437404574486157423515254961NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021364041404877555357454213224350521Dallas Executive Airport C402
Greenville C1006/A1981393938465243365663512625194046551Greenville C1006/A198
Pilot Point C10321434745446749417873552418293867491Pilot Point C1032
Italy C1044/A3231344042354845565153365315243043411Italy C1044/A323
Corsicana Airport C10511404347505047496159393135213638431Corsicana Airport C1051
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Longview C19/A127/C6442293130404458477751342921224641442Longview C19/A127/C644
Tyler Airport Relocated C821333126324351484748344127233843471Tyler Airport Relocated C82
Karnack C85/AFHP3031283833424945344945343723213434311Karnack C85/AFHP303
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X1512476273363634294833393441343325342El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591445753303229284328393536302822271Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14856643234292644NANA2337292921231Chamizal C41/AH126
Socorro Hueco C49/F3121536644343930313736474040292924321Socorro Hueco C49/F312
Skyline Park C721446370383632285639383840333027291Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N2826201816664040433734242227333BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414454462830252439323729NANANA17221Ivanhoe C414
Cd Juarez Delphi C6631 N3351392428232315NANANANANANANANA1Cd Juarez Delphi C663
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Waco Mazanec C10371373735334443495953334622233438441Waco Mazanec C1037
Temple Georgia C10451393734314140556357445433273946481Temple Georgia C1045
Killeen Skylark Field C10471413835334145516367515039284150531Killeen Skylark Field C1047
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2332731363737585253193335172357312Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412282728362734424055223735172447322West Orange C9/A141
Port Arthur West C28/A128/A2281292734342932626252192728182736261Port Arthur West C28/A128/A228
Hamshire C64/C6541272624212432445447202532223238251Hamshire C64/C654
SETRPC Port Arthur C6281 N302424292327585851192626192232221SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541312829302729554844222630263633241SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N272830363242323661274431142154321SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431313235363237726555273235202748331SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1302831383237585355223335192443311Nederland High School C1035
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Austin Northwest C3/A3222373730273843516849353743143241402Austin Northwest C3/A322
Audubon C381394235314345477152404439173551481Audubon C38
Fayette County C6012 N313131273436505441313334203248352Fayette County C601
Dripping Springs School C6141 N363732293940456047393538203050471Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N282625232829434841283128142736301CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N383832314245427056434942213744451CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N292824212932394938292936132644351Gorzycki Middle School C1603
Lockhart C16041 N353430243639525542333834173345391Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N323126273330424640252937132840371CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N262423222527374235252531142228321CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Houston East C1/G3162322633323052395952244719152143382Houston East C1/G316
Houston Aldine C8/AF108/X150 2332733304046385157235218182436392Houston Aldine C8/AF108/X150
Channelview C15/AH115 3252423263065344858234921172240343Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542373649375545396054275530232946452Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391292529302743427049203423162344341Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451272625272835486053162926182849311Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1252526303244469538183325213264361Houston Bayland Park C53/A146
Conroe Relocated C78/A3211494844514157424586456529243038331Conroe Relocated C78/A321
Manvel Croix Park C841262524272525388529172335193047251Manvel Croix Park C84
Clinton C403/C304/AH113 3271926282848386239183522192550273Clinton C403/C304/AH113
Houston North Wayside C4051312734273557445249204816192740371Houston North Wayside C405
Houston Monroe C4061212226222426388137202625172347281Houston Monroe C406
Lang C4082282734303754456953265328212747342Lang C408
Houston Croquet C4092272726272936469339193233223174342Houston Croquet C409
Houston Westhollow C4101262827283235378841234432253062361Houston Westhollow C410
Houston Texas Avenue C4111242328292845466241193316192747281Houston Texas Avenue C411
Park Place C4161252632263042478044213120182355311Park Place C416
Sheldon C5511 NNANANANANANANANA56275222172134311Sheldon C551
Baytown Wetlands Center C5521 N252022252435295852153425152240271Baytown Wetlands Center C552
Crosby Library C5531 N252825262944353772285721152036291Crosby Library C553
West Houston C5541 NNANANANANANANANANA222926202226291West Houston C554
La Porte Sylvan Beach C5561 NNANANANANANANANANA162528162342251La Porte Sylvan Beach C556
Mercer Arboretum C5571 N333339444443334666315623192334281Mercer Arboretum C557
Tom Bass C5581 N151617161718307226121921122044221Tom Bass C558
Katy Park C5591 N312928303231387837223837232851441Katy Park C559
Atascocita C5601 N323031323646343368284719162233321Atascocita C560
Meyer Park C5611 N333445395546385959356329222940431Meyer Park C561
Bunker Hill Village C5621 N242826283143377342254229222948371Bunker Hill Village C562
Huffman Wolf Road C5631 N192218202326222661264315101423191Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N312730303366385754244522172352511HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N323228312855396273236130192747371Wallisville Road C617
Danciger C618 1 N242523222132255327172325313353291Danciger C618
Mustang Bayou C619 1 N252526252231376638172732243648281Mustang Bayou C619
Texas City 34th St. C620 1 N252526242124345535161823162142251Texas City 34th St. C620
UH Moody Tower C6951 N293037333453509152243823233362351UH Moody Tower C695
U of H-Sugarland C6961 N272522242830338330203033253369321U of H-Sugarland C696
UH Coastal Center C6971 N262628262324427342182432203052261UH Coastal Center C697
UH WG Jones Forest C6981 N444440524847414577436835232939351UH WG Jones Forest C698
UH West Liberty C6991 N303327323335404083386329192339341UH West Liberty C699
Lynchburg Ferry C1015/A165 1242523262659305156214022162040241Lynchburg Ferry C1015/A165
Lake Jackson C1016 1262524222129266723172126314343261Lake Jackson C1016
Baytown Garth C10171293026292751365668225528182547361Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831313030342931437954252940263146301Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
San Antonio
San Antonio Northwest C232363833274449505947364146223558462San Antonio Northwest C23
Camp Bullis C581404234294656436650424739203457461Camp Bullis C58
Calaveras Lake C591343326233641425639313530203953371Calaveras Lake C59
Elm Creek Elementary C5011 N333328273935494839303046214843361Elm Creek Elementary C501
Fair Oaks Ranch C5021 N353831274148336147374030162641371Fair Oaks Ranch C502
Bulverde Elementary C5031 N403830274754357352474240193143401Bulverde Elementary C503
New Braunfels Airport C5041 N363330263944535044323734173549351New Braunfels Airport C504
City of Garden Ridge C5051 N282521193234374335282832172739281City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N373431264042475245323631153550371Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N363327254041446041313737213950381Heritage Middle School C622
CPS Pecan Valley C6781 N3835292736NANA4943343337204843381CPS Pecan Valley C678
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C42272929222329363526222731323655362Corpus Christi West C4
Corpus Christi Tuloso C211252826192125344123212531293547281Corpus Christi Tuloso C21
Victoria C871272926212532335332242928283046321Victoria C87
Inez C6091 N242627232323293923212131322948271Inez C609
Coleto C6241 N202220171922264525201924172538241Coleto C624
Aransas Pass C6591 N232723191827242220182125273249271Aransas Pass C659
Holly Road C6601 N262928212227302822212630283146301Holly Road C660
Violet C6641 N232526171825302820172028273546261Violet C664
Ingleside C6851 N242824192126242023202225283042271Ingleside C685
Odem C6861 N272825202629314126222728293342291Odem C686
Taft C6871 N283128232434352929242733343849331Taft C687
Cuero C16021 N293128203033405034293530193644311Cuero C1602
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP1431323130202022292722202435253134421Mission C43/AP143
Brownsville C80/AGP1801252831181619251920202226252530291Brownsville C80/AGP180
Harlingen Teege C10231282933242527304527242927273137361Harlingen Teege C1023
AreaMonitoring SitePOCSeptember 2014POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P2441NANA14232227282524252720232639331Laredo 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.