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Peak Daily One-Hour Ozone Averages for May 2016

The table below lists the peak daily one-hour ozone concentrations measured in May 2016 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 SitePOCMay 2016POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 247375258597266445662605462485053703140765439474230365241592Ft. Worth Northwest C13/AH302
Keller C17243374854577966435460595463514851612835735541504229354841552Keller C17
Frisco C31/C6801423747515457634852686765684541575228355649475439NA395455541Frisco C31/C680
Midlothian OFW C52/A137146365758685658434962566054514254542941614739434028364938451Midlothian OFW C52/A137
Denton Airport South C56/A163/X157144394853567570475469645874514956492930626852584130395657571Denton Airport South C56/A163/X157
Arlington Municipal Airport C61141355356665657434967585556484451552846734738443925404532461Arlington Municipal Airport C61
Dallas North No.2 C63/C679142374956635863484866615861474354612845694942503828364843511Dallas North No.2 C63/C679
Rockwall Heath C69139345054605466494871596357434051562739604950563431424739471Rockwall Heath C69
Grapevine Fairway C70/A301/X182141395054637364475664625865504752602936666042544128345345601Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071138324760585260484766555653434547552830665443483327344234431Kaufman C71/A304/X071
Granbury C73/C681148375356606172445960595453494952583239504740423333455340581Granbury C73/C681
Eagle Mountain Lake C75 143364955598264433756615265494951563034595140453923364638531Eagle Mountain Lake C75
Parker County C76149405058606475486259675959495854683435585137444034475144601Parker County C76
Cleburne Airport C77/C682150396458675968455966626358565160633945605644514336425850601Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 346395357616464484670615859504754652944805139483727354939503Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402145375359635959454770595654484350572941774538463627334534451Dallas Executive Airport C402
Greenville C1006/A198136314853575460554666636254423755522635454853573631374237481Greenville C1006/A198
Pilot Point C1032140NA4651585668475062696175473954532832454748573932395856581Pilot Point C1032
Italy C1044/A3231483847NANA58634653656167535247555432NANANANANANANA364838431Italy C1044/A323
Corsicana Airport C1051137375364695470444660516055434648512935464640423832344539441Corsicana Airport C1051
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C644240394962636656515061576266484843482828465552543729263840632Longview C19/A127/C644
Tyler Airport Relocated C82140354460565753524460566565405253523032507352513837343740341Tyler Airport Relocated C82
Karnack C85/AFHP303139324356555754524143446550504031412528414451513624223340621Karnack C85/AFHP303
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X151253445861575866615156595572565739513769555655515755576268552El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159151435455505159544147504959525129443671545653475350605966561Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 157415756515770635359634871525641473270585859526157606568581Chamizal C41/AH126
Socorro Hueco C49/F312141455662585565615158605359585238473562555653515751576464591Socorro Hueco C49/F312
Skyline Park C72157445359575867625358605366555848484062575657545956606267581Skyline Park C72
Ivanhoe C41415140505454506357495355455749483640NA70565854465346545663541Ivanhoe C414
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Waco
Waco Mazanec C1037144325852624955445361516957524249473037474936513331374841421Waco Mazanec C1037
Temple Georgia C1045149355357625760445860646459554852503539535843423530394641401Temple Georgia C1045
Killeen Skylark Field C1047149374957565562445567576055554553453541535845413234394645421Killeen Skylark Field C1047
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 241323755516477624839384755656140334733366359503720334463652Beaumont-Downtown C2/A112/C2002
West Orange C9/A141240493748476662594141343745735942314333314951473320214161652West Orange C9/A141
Port Arthur West C28/A128/A228146474757607263645040403567696365526940484551544422254966451Port Arthur West C28/A128/A228
Hamshire C64/C6541424348585675646448404132635567NANANANANANANANA2521355768611Hamshire C64/C654
SETRPC Port Arthur C6281 N40424348475454584737343146484653405444393842433926274953381SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C1654150545359666368685346423562696171474244614057584626275568481SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N39383850485072604539354542644136303429294357483121284568621SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643136383849516456544236333456645749375732384445453520254357441SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1424642575875676450444043617466NA3757NA33NANA4740233048NANA1Nederland High School C1035
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Austin
Austin Northwest C3/A322248405555676657464353555364464052464646554643403528384338412Austin Northwest C3/A322
Audubon C38147405152586556435552475061403542433741504538352930333837371Audubon C38
Fayette County C6012 N43395061566757514449454153424052353829405255352926303835422Fayette County C601
Dripping Springs School C6141 N47415154536559475753554858484044484745655040403443454581471Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N35305356535955434451494152443552403739413939343023293431331CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N46365052585760455762515757423649413844444841383333384169371CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N49425757646557465653554859453847434544644137382929364035441Gorzycki Middle School C1603
Lockhart C16041 NNANA5459706059434652503854483047393834444237312527283734371Lockhart C1604
St. Edwards University C16051 N39334949625449374645464450363142394238483733312622283230341St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N42306057735957424852503955463244384836523737332731343835411CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N42365354645354445355555253463950434347494640353228354334341CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G316248334256548068564444386774516041543621445053603421274857632Houston East C1/G316
Houston Aldine C8/AF108/X150 241394664656681594753446660665445504624454459653327314663762Houston Aldine C8/AF108/X150
Channelview C15/AH115 346354161576664544238345765695543413622394245473019294357453Channelview C15/AH115
Northwest Harris Co. C26/A110/X154236364359507064524354455657434849453623463952663426283844802Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239141334562617264554241375665525756545325503846523420194755461Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45140334762635960554140383660535862385334404346503621244855421Seabrook Friendship Park C45
Houston Bayland Park C53/A146 159395865679964574749458997477353676727765454583026274854621Houston Bayland Park C53/A146
Conroe Relocated C78/A321135364763595890595369594456544850403329364257543840323969551Conroe Relocated C78/A321
Manvel Croix Park C84151456866766764574543424464486151637728795051542726245357511Manvel Croix Park C84
Clinton C403/C304/AH113 348384659657861513936346673445646634524494450532919273853573Clinton C403/C304/AH113
Houston North Wayside C405138343750556962473638325957474934443721394447682619273848691Houston North Wayside C405
Houston Monroe C406140344456575950483936334959415644515623543845513018194651481Houston Monroe C406
Lang C408239334960589161534346407475506137564024616157713126283755772Lang C408
Houston Croquet C409258375559637159534245427971445950616924734747532724214849572Houston Croquet C409
Houston Westhollow C410152414959629560544451448689486851645325686260573223264452581Houston Westhollow C410
Houston Texas Avenue C4111513645535687565140413470814661425717NANANANANA2521274551591Houston Texas Avenue C411
Park Place C4161553750606077595342433667744259446453235844485731212520NANA1Park Place C416
Sheldon C5511 NNANA81585361615039373355495438323231213343NANANANANANANANA1Sheldon C551
Baytown Wetlands Center C5521 N38334155515356523733332953475350334525383641443218214550331Baytown Wetlands Center C552
Crosby Library C5531 N40404967576669624948466055645144383532383951523231344970511Crosby Library C553
West Houston C5541 NNA3444585610761524249418174445641584323606960622822243844591West Houston C554
La Porte Sylvan Beach C5561 N3833436262606157413930NANANANANANA5229383846493721265057391La Porte Sylvan Beach C556
Mercer Arboretum C5571 NNANA54NANANANANANANANANANANANANANANANANANANANANANANANANANA1Mercer Arboretum C557
Tom Bass C5581 N39355154575951483835314654385046516223613740452216144346471Tom Bass C558
Katy Park C5591 N363439515210257473739327164394643432920426355472118213541361Katy Park C559
Atascocita C5601 N38333855515167524246385151544241343322333546482927294054521Atascocita C560
Meyer Park C5611 N29303953516162484149394850424134373422423445533220222744661Meyer Park C561
Bunker Hill Village C5621 N43364958579558494346397384436443585024635759542422213746521Bunker Hill Village C562
Huffman Wolf Road C5631 N4034436054547157394842474744NANA3131213237NANA292923NA69471Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N44374661597967524343376770506154564225444649562920304759621HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N43354563566465614547444665616253534028384051523725335466521Wallisville Road C617
Danciger C618 1 N37445359576456514138353952425044525631723844432218184747341Danciger C618
Texas City 34th St. C620 1 N34344550696364644742404263526365394840604552553922225659NA1Texas City 34th St. C620
UH Moody Tower C6951 N49405063628660554343357281506447645421604448582722264852551UH Moody Tower C695
U of H-Sugarland C6961 N653745515862555241403773724260535255266848483924162125NANA1U of H-Sugarland C696
UH Coastal Center C6971 N40376468745860604238363461475859554837684248533620225857451UH Coastal Center C697
UH WG Jones Forest C6981 N3739486360669660526856505950525442382648425759453820NANANA1UH WG Jones Forest C698
UH West Liberty C6991 N39334156535063564244404643602545303023304351452423314669361UH West Liberty C699
Lynchburg Ferry C1015/A165 140364158536163584343354565615752393823363646503322305257441Lynchburg Ferry C1015/A165
Lake Jackson C1016 142446459646661604441373249344658614335895547443019215458361Lake Jackson C1016
Baytown Garth C1017144334461566463614244424364586153503727353948493721295157471Baytown Garth C1017
Galveston 99th St. C1034/A320/X183149495992867072745245413962536772544851806457594424267068461Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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San Antonio
San Antonio Northwest C23246475759857758465159494261412843404440574234392835394337452San Antonio Northwest C23
Camp Bullis C58 146465262747260455365514470362740353635583836372632414540471Camp Bullis C58
Calaveras Lake C59142406063637154444657493952413641394740433539382736364237401Calaveras Lake C59
Elm Creek Elementary C5011 N47436656686754424858504049413040354750513131352824324127311Elm Creek Elementary C501
Fair Oaks Ranch C5021 N43405055556957435063515464352940404037573935372935383940481Fair Oaks Ranch C502
Bulverde Elementary C5031 N44434856567257435357524257392843404239623735392836333635421Bulverde Elementary C503
New Braunfels Airport C5041 N41325856626555404652463752433339354434462933322232323734371New Braunfels Airport C504
City of Garden Ridge C5051 N45426159717156414953513854403341384943563334362222363936401City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N35325059646454424652453950463042343731413238302434313534371Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N40335357566252404354423345372935274034372935342331333532381Heritage Middle School C622
CPS Pecan Valley C6781 N44406058636552404556483752372938354341453237382333384433371CPS Pecan Valley C678
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4233405264666854484246403023263144394937434234332730224136312Corpus Christi West C4
Corpus Christi Tuloso C21137395163607053454043373129262739364433403626312528203732301Corpus Christi Tuloso C21
Victoria C87139385569616760514545414052373840414429565245332527215839301Victoria C87
Inez C6091 N40394652475555504142372634293537323726453239351917194635251Inez C609
Holly Road C6601 N26344856586055473735NANANANANANANANANANANANANANANANANANANA1Holly Road C660
Odem C6861 N26344555526048413434322624241827293423322825241822153529231Odem C686
Taft C6871 N26354859586154463838352720192236333929393130281924183631261Taft C687
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143141363356705446403741383736282744405141313026222836323430271Mission C43/AP143
Brownsville C80/AGP180130364054725852454642403121181735393127212220222525182828241Brownsville C80/AGP180
Harlingen Teege C1023133394057636653464647443625282443493730273127262832323132241Harlingen Teege C1023
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P244140304256664646363744433325312448413034292722293031344535261Laredo 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 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.