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Daily Maximum Eight-Hour Ozone Averages for May 2016

The table below lists the peak daily maximum eight-hour ozone concentrations measured in May 2016 in each community where the TCEQ measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

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 with AQI colors
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2413550525565624048535248564246495527336247363526263147NA2Ft. Worth Northwest C13/AH302
Keller C172383346495367604045515342553944485125296149354225263344NA2Keller C17
Frisco C31/C68013734444953546143455762496142395047253152474549NVNANV48NA1Frisco C31/C680
Midlothian OFW C52/A1371423351546053564042545151494539495125325243353926263245NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571393545495367654044546145683944514526285356464930283551NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C611383349535854544042575049514140475023346343333726233141NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C6791383447525856594244585548574340495123306047404430273243NA1Dallas North No.2 C63/C679
Rockwall Heath C6913732485156536141465849445340384852233155464850322734NVNA1Rockwall Heath C69
Grapevine Fairway C70/A301/X1821383548515968614148565647594144485026305652394627263046NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711343045545550564144554646504040435222285848414330263037NA1Kaufman C71/A304/X071
Granbury C73/C681142345153575763415256534951454749533030464436NV29314050NA1Granbury C73/C681
Eagle Mountain Lake C75 14033464952686138NVNV4941574045464627285147333822213044NA1Eagle Mountain Lake C75
Parker County C761453748545762684356576251574553505632315149363729324047NA1Parker County C76
Cleburne Airport C77/C682146355854635761434960555454495057593437545241NV31333954NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3413550535760594442595452544544495625336847374227253043NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021413450545755574342595149504339455023306442354026253040NA1Dallas Executive Airport C402
Greenville C1006/A1981332946505351554443575247494036494922304446494828293336NA1Greenville C1006/A198
Pilot Point C1032137NANV495453644046536346633938484627304344454932283450NA1Pilot Point C1032
Italy C1044/A32314234NVNANANV5944NV5950595047445050NVNANANANANANANANV44NA1Italy C1044/A323
Corsicana Airport C10511363149596051613943504554503742434624294442374035282938NA1Corsicana Airport C1051
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442383345575760544845514454594245384421254252505132252433NA2Longview C19/A127/C644
Tyler Airport Relocated C821383043545455524641534950593647445022274461504733333032NA1Tyler Airport Relocated C82
Karnack C85/AFHP303135NV40525153534939413858474337243621NV36394946332112NVNA1Karnack C85/AFHP303
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124143555954556259495356536253473545345653535249544954NVNA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15913740495147435453404548464948NV2741345850515045504651NVNA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 13939545347556762515760465849473740285754545550585157NVNA1Chamizal C41/AH126
Socorro Hueco C49/F31213943515955526059495657515355473444345652525150NV4654NVNA1Socorro Hueco C49/F312
Skyline Park C7213942495855546257515557505852483944355655505448565259NVNA1Skyline Park C72
Ivanhoe C414135374551484859554651534448484332NVNANV53535145524451NVNA1Ivanhoe C414
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Waco
Waco Mazanec C1037140295148544750424950NV56524339464226294345344328283342NA1Waco Mazanec C1037
Temple Georgia C10451453151545856564151555256575043494432334649393226273543NA1Temple Georgia C1045
Killeen Skylark Field C1047145294753NV54574148555354535042484231344348393427303442NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2332335494956625543373637485551363139243346474731182235NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412372933444658585437373233416247362837242840464430171935NA2West Orange C9/A141
Port Arthur West C28/A128/A2281433443525664616045373731616251534156294136495137212041NA1Port Arthur West C28/A128/A228
Hamshire C64/C6541382840525565625745393828554958NANANANANANANANANV192747NA1Hamshire C64/C654
SETRPC Port Arthur C6281 N383744444551555642353326424444473441363532404135252541NA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541474847556159646549434029586264674340355236525541242546NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N362534454648615442383340395032332829232740474528191940NA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431332636454856524938343129495446363244233332424331181935NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1382940525467635846423735526351NANVNVNANVNANANV35212240NA1Nederland High School C1035
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Austin
Austin Northwest C3/A32224330525463615640NV504649603838464039405043393126243441NA2Austin Northwest C3/A322
Audubon C381443049475461553948484545583232393731354641352824243036NA1Audubon C38
Fayette County C6012 N403648575360554641453935413635463233253643423324222631NA2Fayette County C601
Dripping Springs School C6141 N453149525161554151514845554035424135405243393732394140NA1Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N342847535056534042434136483428423333323836352922212432NA1CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N422847505755584149524853533732443733364041373128283238NA1CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N443254555862563951524844544034423739375439363023273137NA1Gorzycki Middle School C1603
Lockhart C16041 NNANANV556257564143464334514229433536314134332823242533NA1Lockhart C1604
St. Edwards University C16051 N352446475651483341433940473129373135324234312419202531NA1St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N392854536557544045464436513730423240294433332824272835NA1CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N393050525751523848524649504436463937394440353023253140NA1CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162382737525171625342413657614446374232173638485026201641NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 2373344605863715644504158554745414038214239515731252639NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 3373040575361595239363144534745363332203534424422172139NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542333241544765604940494045543741443729223735475530232833NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391352741585760595140383543563748494242214134434830181742NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4513825425954565752403736325339575835422335374346301819NVNA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1443553625884615444464063784051455253206144505326222041NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A3211333343515655805646615140484337443428243533485028363335NA1Conroe Relocated C78/A321
Manvel Croix Park C841433759646563605243403637584050475158236641474624211946NA1Manvel Croix Park C84
Clinton C403/C304/AH113 33831435556695548363431566039464244391942364546231716NVNA3Clinton C403/C304/AH113
Houston North Wayside C4051322835474862554433363051463238293532173635435322172030NA1Houston North Wayside C405
Houston Monroe C406134273853495348453733NV39523745404040204533434525171640NA1Houston Monroe C406
Lang C40823330445652785950404236595941463344291949485152262121NVNA2Lang C408
Houston Croquet C4092433349575564554940413752633745454853196140464724211742NA2Houston Croquet C409
Houston Westhollow C4101403647565584585041483866734250435247215447534726212135NA1Houston Westhollow C410
Houston Texas Avenue C41113629415149755347373832566642483840NVNANANANANANV191840NA1Houston Texas Avenue C411
Park Place C416140304457546756503940345264NV484046431647374549251916NVNA1Park Place C416
Sheldon C5511 NNANANV5450565648373430424236313028281830NVNANANANANANANA1Sheldon C551
Baytown Wetlands Center C5521 N332840514849534835313127473745452936213332394228171839NA1Baytown Wetlands Center C552
Crosby Library C5531 N373244625158665544424050494639423232263333474830262742NA1Crosby Library C553
West Houston C5541 NNANV42545189594938463760623644334535194551524925202026NA1West Houston C554
La Porte Sylvan Beach C5561 N36284158545758544036NVNANANANANANANV243335434631192144NA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N00NVNANANANANANANANANANANANANANANANANANANANANANANANANA1Mercer Arboretum C557
Tom Bass C5581 N343044515151504536332935493342413944185032374020131237NA1Tom Bass C558
Katy Park C5591 N322937484779534434342852553239353024173444453719151728NA1Katy Park C559
Atascocita C5601 N332836514842624939433644444137392929213132424525232437NA1Atascocita C560
Meyer Park C5611 N262737484555574537433642473435332927213530414727191925NA1Meyer Park C561
Bunker Hill Village C5621 N333346555286554639423558653745354443205144504622191728NA1Bunker Hill Village C562
Huffman Wolf Road C5631 N3529405450516454NA45394143NVNANA26282028NVNANA2625NVNANA1Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N3331425855706250NV3934566143474340362139374649251919NVNA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3831425851596156424240405649514540352335354849332326NVNA1Wallisville Road C617
Danciger C618 1 N3537485453615347393632324834394041482558344039201617NVNA1Danciger C618
Texas City 34th St. C620 1 N32293938NV606260444038365747606037453245414953342020NVNA1Texas City 34th St. C620
UH Moody Tower C6951 N363246595574585240403457684349424344184838444823191844NA1UH Moody Tower C695
U of H-Sugarland C6961 N4533424948605347383731456135454745482053414337231519NVNA1U of H-Sugarland C696
UH Coastal Center C6971 N363155636554575440353430564455534343315035464931182049NA1UH Coastal Center C697
UH WG Jones Forest C6981 N35364760566281564761494553434147363124403449543934NVNANA1UH WG Jones Forest C698
UH West Liberty C6991 N3328385248485952404035393945NA412728212935444321202741NA1UH West Liberty C699
Lynchburg Ferry C1015/A165 1353039545057595542373034513846473232193134424522182145NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 1393455565862585343383429403150494938336631434124171940NA1Lake Jackson C1016
Baytown Garth C10171372940565160615439403738554749443834223233454632202345NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X18314740548270667168504139346154696944NV40624552NV38202454NA1Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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San Antonio
San Antonio Northwest C232443353557471564146534637563424393534364834332625303339NA2San Antonio Northwest C23
Camp Bullis C58 1433449586169584149574639623124383027314531332522273341NA1Camp Bullis C58
Calaveras Lake C591403155605767534243494535473927403836333931332725313038NA1Calaveras Lake C59
Elm Creek Elementary C5011 N443358546064513944504436453625372838394128292525212734NA1Elm Creek Elementary C501
Fair Oaks Ranch C5021 N393044524966553945574837552924363428354334342623293336NA1Fair Oaks Ranch C502
Bulverde Elementary C5031 N413146535067543948534938532925393430364733342724292931NA1Bulverde Elementary C503
New Braunfels Airport C5041 N382752535760523943464333483428373238263926292620262633NA1New Braunfels Airport C504
City of Garden Ridge C5051 N423253566564533845464432493025383439344430322520NV2936NA1City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N3327475256615240424642334837253931302338293327222826NVNA1Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N3627495451584938414539304233223430322834263023212726NVNA1Heritage Middle School C622
CPS Pecan Valley C6781 N41295555586250384146NA32483123353137303928322321282937NA1CPS Pecan Valley C678
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4229365061616453474141342821222740364331413028292426NVNVNA2Corpus Christi West C4
Corpus Christi Tuloso C211313648615866514339393329252324363438273726252722231923NA1Corpus Christi Tuloso C21
Victoria C871373649625965574942NV383742313337383826503340NV22212045NA1Victoria C87
Inez C6091 N363743464050534840383423302130342834203724343216151835NA1Inez C609
Holly Road C6601 N233146545457474535NVNANANANANANANANANANANANANANANANANANA1Holly Road C660
Odem C6861 N243142534957453933312724191915262628182920212015181621NA1Odem C686
Taft C6871 N243243555158494436342825171718333035243524242517201922NA1Taft C687
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP1431363431526152433935393534292323393744292626221825281927NA1Mission C43/AP143
Brownsville C80/AGP1801283538536155504443393727201615323827241718171722232025NA1Brownsville C80/AGP180
Harlingen Teege C1023131363754605851444344413323222039443228232722222629NV27NA1Harlingen Teege C1023
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P2441352340535044423434424030232820403827312424202326293243NA1Laredo Vidaurri C44/AFGP144/P244
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
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 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.