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Peak Daily One-Hour Ozone Averages for July 2019

The table below lists the peak daily one-hour ozone concentrations measured in July 2019 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 SitePOCJuly 2019POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23938383535344745485155615436554238NANANANANA2Ft. Worth Northwest C13/AH302
Keller C1724439393236393842465648495234614541NANANANA332Keller C17
Frisco C31/C6801584945414157556050625246463263544744474350531Frisco C31/C680
Midlothian OFW C52/A1371393633303137313535486265613747433737353635581Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571554948393841484351665148523350514344454347461Denton Airport South C56/A163/X157
Arlington Municipal Airport C611353636303432273437435363523155423438353337511Arlington Municipal Airport C61
Dallas North No.2 C63/C6791494341363549524841544949513269504139393644551Dallas North No.2 C63/C679
Rockwall Heath C691282923202028393135314338251767252124272830431Rockwall Heath C69
Grapevine Fairway C70/A301/X1821483939343442375142584650472852413740403638411Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711313632273026313043404443362559303638383840541Kaufman C71/A304/X071
Granbury C73/C6811374240383332373251496567573739434444464034531Granbury C73/C681
Eagle Mountain Lake C75 1444344373735NANA50626056563742444345444141491Eagle Mountain Lake C75
Parker County C761423941373232402846505755583838424244454036501Parker County C76
Cleburne Airport C77/C6821354543374335343253538193644246474248424238501Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3363837323041463836495052523164433635343037503Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021403940343444414039545760573773463938363540641Dallas Executive Airport C402
Greenville C1006/A1981393531312933453836414843392655353735373932501Greenville C1006/A198
Pilot Point C10321605657474741514458755146533249594949514858481Pilot Point C1032
Italy C1044/A32314235372831363436355058575038424032NA363235NA1Italy C1044/A323
Corsicana Airport C10511334233293339333741544949382940364040364245541Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442263527252430353925604350372838292634272426382Longview C19/A127/C644
Tyler Airport Relocated C821312927272429323328425345362551323234352725471Tyler Airport Relocated C82
Karnack C85/AFHP3031334137293056265435383848343039413135313243381Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X151/G125273473941584961545567606980698268587459NANA572El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X159170443937525255515873556068597658607560NANA501Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1744941435652605555675768796682646280616070561Chamizal C41/AH126
Socorro Hueco C49/F3121605542406161555761705760636068526786606569561Socorro Hueco C49/F312
Skyline Park C721714641425251635753635657685974616386695962571Skyline Park C72
Ivanhoe C414/F5141765042435857576155705757676078556685636668561Ivanhoe C414/F514
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Waco
Waco Mazanec C10371443535273132383637495652484450373437373534631Waco Mazanec C1037
Temple Georgia C10451483736273237374040466154584251383341373735491Temple Georgia C1045
Killeen Skylark Field C10471554642344041414060516158583955464350454341411Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2523327212036393334514447434026252224222229282Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412502927254160594539413735373933272425262729352West Orange C9/A141
Port Arthur West C28/A128/A2281432922201734362424553636323531222121202024271Port Arthur West C28/A128/A228
Hamshire C64/C6541402924192432412932473645345233262223222328331Hamshire C64/C654
SETRPC Port Arthur C6281 N463027212146402726643937343831222222212228311SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541462927211927371523336740353832242321242030301SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N512813162237334541283132333528192021182817351SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643148372722NANANA2930614341364832252323232332291SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1492522181729372627513635314527201920191826261Nederland High School C1035
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Austin
Austin Northwest C3/A3222453731243034404041595858574164363438373434582Austin Northwest C3/A322
Audubon C381463733263035373841646157543755343239363435581Audubon C38
Dripping Springs School C6141 N463831293133404044536458513749363540383535441Dripping Springs School C614
CAPCOG Lake Georgetown C6901 N504639303440424658626359573967413844403839401CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N473735262931394341546060564360343339383534471Gorzycki Middle School C1603
Lockhart C16041 N373331222731364537484954544442312934343133341Lockhart C1604
St. Edwards University C16051 N353124212421303832444955473648302631312929431St. Edwards University C1605
CAPCOG Bastrop CAMS16121 N1915151054444424647413737282631293029311CAPCOG Bastrop CAMS1612
CAPCOG Elgin C16131 N362929222535323833475053503944312932323232361CAPCOG Elgin C1613
CAPCOG San Marcos Staples Road C16751 N433529252929364139445563484649333235363333421CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N413130242628424038495557564168333035343232471CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162463933202850463538824846374329302927252931322Houston East C1/G316
Houston Aldine C8/AF108/X150 2665341343955544955804551414339343836364043482Houston Aldine C8/AF108/X150
Channelview C15/AH115 3534828223478544241754451364631302629272835333Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542483836243746303334414349393843313333323330292Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391473230202547373029586451404831282627242530331Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451443025201941413127396046373729212221232127291Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1473533352439423738606962434231262931283238271Houston Bayland Park C53/A146
Conroe Relocated C78/A3211654955335772424963453649383734433952535038451Conroe Relocated C78/A321
Manvel Croix Park C84138252517233237303153NA46444026272726242625301Manvel Croix Park C84
Clinton C403/C304/AH113 33828109192138362529795752404428262523212628243Clinton C403/C304/AH113
Houston North Wayside C4051504332222843413338824745353728262728262931361Houston North Wayside C405
Houston Monroe C4061403028192338312628546755444129282623222425231Houston Monroe C406
Lang C4082473831292749434251685349384136283130303234362Lang C408
Houston Croquet C4092412825192234342527566357394026232726242827322Houston Croquet C409
Houston Westhollow C4101423230362945362830475755383826282929262935291Houston Westhollow C410
Park Place C4161443329222640373033646856444429303024252729301Park Place C416
Baytown Wetlands Center C5521 N292013101126222017482434253316121619232632291Baytown Wetlands Center C552
Crosby Library C5531 N514323233770494347663950344329333133333248351Crosby Library C553
West Houston C5541 NNA2744402947324126145258303425464527272926421West Houston C554
La Porte Sylvan Beach C5561 N422623201740352925374944334126202120232127281La Porte Sylvan Beach C556
Tom Bass C5581 N453334283239403230577359474529293028262832321Tom Bass C558
Katy Park C5591 N433329262330312626364245373840373525434851441Katy Park C559
Atascocita C5601 N514028183451484044542837272926262930353933291Atascocita C560
Meyer Park C5611 N513432223449404146614646333638313639403531351Meyer Park C561
Huffman Wolf Road C5631 N34272119315431303430243019222124232522NANA411Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N463928122745173433744245354128272928262933221HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N463329273756614344704251354637313030313141341Wallisville Road C617
Danciger C618 1 N362929171830272221335566404023212021192126241Danciger C618
Texas City 34th St. C620 1 N493231252341422627437862514735262625272630321Texas City 34th St. C620
UH Moody Tower C6951 N463731233040423337806659474431313329283030391UH Moody Tower C695
UH WG Jones Forest C6981 N685535NANANANANANA494453393843444751544838381UH WG Jones Forest C698
UH West Liberty C6991 N484126304671484755543847303732333137323344341UH West Liberty C699
Lynchburg Ferry C1015/A165 1474324222463453431743641304131282326262629311Lynchburg Ferry C1015/A165
Lake Jackson C1016 1392723181725291920217766454326222220182024261Lake Jackson C1016
Baytown Garth C10171484029273560634442734149404436263029293042321Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831433230242334352520279355524035242322262328271Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N412828191729331920266866424230222220191824231Oyster Creek C1607
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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San Antonio
San Antonio Northwest C232474035323133344045645058524252353135373533572San Antonio Northwest C23
Camp Bullis C58 1514440343439384954695357534267403540413839611Camp Bullis C58
Calaveras Lake C591443529263029323536475762545340303032333132321Calaveras Lake C59
Elm Creek Elementary C5011 N403426282830293336405573544444292830333129301Elm Creek Elementary C501
Fair Oaks Ranch C5021 N494239343337354749624148463560373236383536551Fair Oaks Ranch C502
Bulverde Elementary C5031 N474031302934374550624652463160383036383637541Bulverde Elementary C503
New Braunfels Airport C5041 N383228242729343736425159463744303031323130321New Braunfels Airport C504
City of Garden Ridge C5051 N393127242830333237465559483948302933333032471City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N402925222726333136424858463741292831323129291Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N393126232627293235385258524940282729322830291Heritage Middle School C622
CPS Pecan Valley C6781 N383225212525283239405363504339292631323028381CPS Pecan Valley C678
Government Canyon C16101 N433732312929303535594145503747302931343030501Government Canyon C1610
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42362637362526231927255255613124222221232422282Corpus Christi West C4
Corpus Christi Tuloso C211352745342528232028275453614025232324242524311Corpus Christi Tuloso C21
Victoria C871403035222430302730336155454428242225262428321Victoria C87
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP1431313733272323202836284358603726222228272525271Mission C43/AP143
Harlingen Teege C10231323739282926272832342855583328272530293232291Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441413235393329273836344562636741343135353933311Laredo 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
  • The AQI for ozone is based on either the peak eight-hour running average since midnight OR the peak one-hour measurement since midnight.

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, 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.