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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 24135505255656240485352485642464955273362473635262631473547532Ft. Worth Northwest C13/AH302
Keller C1723833464953676040455153425539444851252961493542252633443647532Keller C17
Frisco C31/C68013734444953546143455762496142395047253152474549NVNANV484544561Frisco C31/C680
Midlothian OFW C52/A13714233515460535640425451514945394951253252433539262632453140501Midlothian OFW C52/A137
Denton Airport South C56/A163/X15713935454953676540445461456839445145262853564649302835514847491Denton Airport South C56/A163/X157
Arlington Municipal Airport C6113833495358545440425750495141404750233463433337262331412837491Arlington Municipal Airport C61
Dallas North No.2 C63/C67913834475258565942445855485743404951233060474044302732433541631Dallas North No.2 C63/C679
Rockwall Heath C69137324851565361414658494453403848522331554648503227344235NVNA1Rockwall Heath C69
Grapevine Fairway C70/A301/X18213835485159686141485656475941444850263056523946272630463847551Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07113430455455505641445546465040404352222858484143302630372938391Kaufman C71/A304/X071
Granbury C73/C681142345153575763415256534951454749533030464436NV293140503648441Granbury C73/C681
Eagle Mountain Lake C75 14033464952686138NVNV49415740454646272851473338222130443245NA1Eagle Mountain Lake C75
Parker County C7614537485457626843565762515745535056323151493637293240474552461Parker County C76
Cleburne Airport C77/C682146355854635761434960555454495057593437545241NV313339543950561Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 34135505357605944425954525445444956253368473742272530433242623Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40214134505457555743425951495043394550233064423540262530402837541Dallas Executive Airport C402
Greenville C1006/A19813329465053515544435752474940364949223044464948282933363440361Greenville C1006/A198
Pilot Point C1032137NANV4954536440465363466339384846273043444549322834504845471Pilot Point C1032
Italy C1044/A32314234NVNANANV5944NV5950595047445050NVNANANANANANANANV443238491Italy C1044/A323
Corsicana Airport C105113631495960516139435045545037424346242944423740352829383337421Corsicana Airport C1051
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64423833455757605448455144545942453844212542525051322524333947392Longview C19/A127/C644
Tyler Airport Relocated C8213830435454555246415349505936474450222744615047333330323531351Tyler Airport Relocated C82
Karnack C85/AFHP303135NV40525153534939413858474337243621NV36394946332112NV3846391Karnack C85/AFHP303
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124143555954556259495356536253473545345653535249544954596346382El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15913740495147435453404548464948NV2741345850515045504651576349381Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 13939545347556762515760465849473740285754545550585157626349361Chamizal C41/AH126
Socorro Hueco C49/F31213943515955526059495657515355473444345652525150NV4654626150421Socorro Hueco C49/F312
Skyline Park C7213942495855546257515557505852483944355655505448565259606350401Skyline Park C72
Ivanhoe C414135374551484859554651534448484332NVNANV53535145524451555948401Ivanhoe C414
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Waco
Waco Mazanec C1037140295148544750424950NV565243394642262943453443282833423536461Waco Mazanec C1037
Temple Georgia C104514531515458565641515552565750434944323346493932262735433735451Temple Georgia C1045
Killeen Skylark Field C1047145294753NV545741485553545350424842313443483934273034423838461Killeen Skylark Field C1047
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2332335494956625543373637485551363139243346474731182248NVNANA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A14123729334446585854373732334162473628372428404644301719455646412West Orange C9/A141
Port Arthur West C28/A128/A22814334435256646160453737316162515341562941364951372120516442391Port Arthur West C28/A128/A228
Hamshire C64/C6541382840525565625745393828554958NANANANANANANANANV1927586650441Hamshire C64/C654
SETRPC Port Arthur C6281 N3837444445515556423533264244444734413635324041352525504735341SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165414748475561596465494340295862646743403552365255412425606743411SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N3625344546486154423833403950323328292327404745281919426148431SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64313326364548565249383431294954463632442333324243311819425439341SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1382940525467635846423735526351NANVNVNANVNANANV35212240NANANA1Nederland High School C1035
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Austin
Austin Northwest C3/A32224330525463615640NV5046496038384640394050433931262434413638502Austin Northwest C3/A322
Audubon C3814430494754615539484845455832323937313546413528242430363334461Audubon C38
Fayette County C6012 N4036485753605546414539354136354632332536434233242226313435322Fayette County C601
Dripping Springs School C6141 N4531495251615541515148455540354241354052433937323941405241471Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N3428475350565340424341364834284233333238363529222124323030361CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N4228475057555841495248535337324437333640413731282832383934491CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N4432545558625639515248445440344237393754393630232731373338441Gorzycki Middle School C1603
Lockhart C16041 NNANANV5562575641434643345142294335363141343328232425333234371Lockhart C1604
St. Edwards University C16051 N3524464756514833414339404731293731353242343124192025312831361St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N3928545365575440454644365137304232402944333328242728353338231CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N3930505257515238485246495044364639373944403530232531403232441CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31623827375251716253424136576144463742321736384850262016385350402Houston East C1/G316
Houston Aldine C8/AF108/X150 23733446058637156445041585547454140382142395157312526395760482Houston Aldine C8/AF108/X150
Channelview C15/AH115 33730405753615952393631445347453633322035344244221721385238383Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423332415447656049404940455437414437292237354755302328334062442Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23913527415857605951403835435637484942422141344348301817415142371Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4513825425954565752403736325339575835422335374346301819415139371Seabrook Friendship Park C45
Houston Bayland Park C53/A146 14435536258846154444640637840514552532061445053262220404953381Houston Bayland Park C53/A146
Conroe Relocated C78/A32113333435156558056466151404843374434282435334850283633366047571Conroe Relocated C78/A321
Manvel Croix Park C8414337596465636052434036375840504751582366414746242119435443361Manvel Croix Park C84
Clinton C403/C304/AH113 33831435556695548363431566039464244391942364546231716NV4948373Clinton C403/C304/AH113
Houston North Wayside C40513228354748625544333630514632382935321736354353221720304549361Houston North Wayside C405
Houston Monroe C406134273853495348453733NV395237454040402045334345251716374745321Houston Monroe C406
Lang C40823330445652785950404236595941463344291949485152262121314859412Lang C408
Houston Croquet C40924333495755645549404137526337454548531961404647242117404744342Houston Croquet C409
Houston Westhollow C41014036475655845850414838667342504352472154475347262121354747391Houston Westhollow C410
Houston Texas Avenue C41113629415149755347373832566642483840NVNANANANANANV1918374953391Houston Texas Avenue C411
Park Place C416140304457546756503940345264NV484046431647374549251916NVNANANA1Park Place C416
Sheldon C5511 NNANANV5450565648373430424236313028281830NVNANANANANANANANANA1Sheldon C551
Baytown Wetlands Center C5521 N3328405148495348353131274737454529362133323942281718384831401Baytown Wetlands Center C552
Crosby Library C5531 N3732446251586655444240504946394232322633334748302627436342471Crosby Library C553
West Houston C5541 NNANV425451895949384637606236443345351945515249252020264150381West Houston C554
La Porte Sylvan Beach C5561 N36284158545758544036NVNANANANANANANV2433354346311921435135371La Porte Sylvan Beach C556
Mercer Arboretum C5571 N00NVNANANANANANANANANANANANANANANANANANANANANANANANANANANA1Mercer Arboretum C557
Tom Bass C5581 N3430445151515045363329354933424139441850323740201312344340301Tom Bass C558
Katy Park C5591 N3229374847795344343428525532393530241734444537191517283534331Katy Park C559
Atascocita C5601 N3328365148426249394336444441373929292131324245252324365143431Atascocita C560
Meyer Park C5611 N2627374845555745374336424734353329272135304147271919254151401Meyer Park C561
Bunker Hill Village C5621 N3333465552865546394235586537453544432051445046221917284348351Bunker Hill Village C562
Huffman Wolf Road C5631 N3529405450516454NA45394143NVNANA26282028NVNANA2625NVNA6540451Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N3331425855706250NV3934566143474340362139374649251919385247381HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3831425851596156424240405649514540352335354849332326486142461Wallisville Road C617
Danciger C618 1 N3537485453615347393632324834394041482558344039201617374431281Danciger C618
Texas City 34th St. C620 1 N32293938NV606260444038365747606037453245414953342020505844371Texas City 34th St. C620
UH Moody Tower C6951 N3632465955745852404034576843494243441848384448231918414949371UH Moody Tower C695
U of H-Sugarland C6961 N4533424948605347383731456135454745482053414337231519NVNANANA1U of H-Sugarland C696
UH Coastal Center C6971 N3631556365545754403534305644555343433150354649311820485542341UH Coastal Center C697
UH WG Jones Forest C6981 N35364760566281564761494553434147363124403449543934NVNANANANA1UH WG Jones Forest C698
UH West Liberty C6991 N3328385248485952404035393945NA41272821293544432120274161NV441UH West Liberty C699
Lynchburg Ferry C1015/A165 13530395450575955423730345138464732321931344245221821435438391Lynchburg Ferry C1015/A165
Lake Jackson C1016 13934555658625853433834294031504949383366314341241719435434301Lake Jackson C1016
Baytown Garth C101713729405651606154394037385547494438342232334546322023455538431Baytown Garth C1017
Galveston 99th St. C1034/A320/X18314740548270667168504139346154696944NV40624552NV382024666440391Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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San Antonio
San Antonio Northwest C2324433535574715641465346375634243935343648343326253033393439552San Antonio Northwest C23
Camp Bullis C58 14334495861695841495746396231243830273145313325222733413736511Camp Bullis C58
Calaveras Lake C5914031556057675342434945354739274038363339313327253130383435441Calaveras Lake C59
Elm Creek Elementary C5011 N4433585460645139445044364536253728383941282925252127342527401Elm Creek Elementary C501
Fair Oaks Ranch C5021 N3930445249665539455748375529243634283543343426232933363739501Fair Oaks Ranch C502
Bulverde Elementary C5031 N4131465350675439485349385329253934303647333427242929313132521Bulverde Elementary C503
New Braunfels Airport C5041 N3827525357605239434643334834283732382639262926202626333233391New Braunfels Airport C504
City of Garden Ridge C5051 N423253566564533845464432493025383439344430322520NV29363335501City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N3327475256615240424642334837253931302338293327222826323233381Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N3627495451584938414539304233223430322834263023212726323032391Heritage Middle School C622
CPS Pecan Valley C6781 N41295555586250384146NA324831233531373039283223212829373133461CPS Pecan Valley C678
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4229365061616453474141342821222740364331413028292426NV333428292Corpus Christi West C4
Corpus Christi Tuloso C2113136486158665143393933292523243634382737262527222319293026291Corpus Christi Tuloso C21
Victoria C871373649625965574942NV383742313337383826503340NV222120443729291Victoria C87
Inez C6091 N3637434640505348403834233021303428342037243432161518322922181Inez C609
Holly Road C6601 N233146545457474535NVNANANANANANANANANANANANANANANANANANANANA1Holly Road C660
Odem C6861 N2431425349574539333127241919152626281829202120151816262518201Odem C686
Taft C6871 N2432435551584944363428251717183330352435242425172019262922241Taft C687
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14313634315261524339353935342923233937442926262218252819272725241Mission C43/AP143
Brownsville C80/AGP18012835385361555044433937272016153238272417181717222320252520161Brownsville C80/AGP180
Harlingen Teege C1023131363754605851444344413323222039443228232722222629NV273021221Harlingen Teege C1023
AreaMonitoring SitePOCMay 2016POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24413523405350444234344240302328204038273124242023262932433223321Laredo 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.