Skip to main content

Peak Daily One-Hour Ozone Averages for November 2021

The table below lists the peak daily one-hour ozone concentrations measured in November 2021 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 SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2571318314151504339423743394855444236364535404341353130372Ft. Worth Northwest C13/AH302
Keller C172591622314052524538413640374756444037354634354341332723362Keller C17
Frisco C31/C68017233233843NANA4743473845374659464339384534394743332921371Frisco C31/C680
Midlothian OFW C52/A1371592819314050524743413644414947463937404432364439333029361Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571671923323753584942403843394561464240364836414744363318391Denton Airport South C56/A163/X157
Arlington Municipal Airport C611601419313951524742413542404652474136374533384444333132371Arlington Municipal Airport C61
Dallas North No.2 C63/C6791592021353948524541393341354453434233374131374442322919351Dallas North No.2 C63/C679
Rockwall Heath C691552123343947503937383239342947364136383930364437303420341Rockwall Heath C69
Grapevine Fairway C70/A301/X1821571620293345504239383541344756434037344333374041333021361Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711553221354048534741423642394847404236394332384440303025341Kaufman C71/A304/X071
Granbury C73/C6811571819294345554537394144425147434238384136394441343332381Granbury C73/C681
Eagle Mountain Lake C75 15912202641505549434240464347394642403946NANA4139NANANANA1Eagle Mountain Lake C75
Parker County C761591822304545514639363843424657434140424336414443353627381Parker County C76
Cleburne Airport C77/C6821642517314347544741413943405545454437434536414543353335391Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3531620333245473936353137314445353533313829303936292419323Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021613724343950494340373140354346403834354131324339302928341Dallas Executive Airport C402
Greenville C1006/A1981592624374251525144423744414651404737404734404541313423361Greenville C1006/A198
Pilot Point C10321702327324453605045454045394650484340395037414547363525381Pilot Point C1032
Italy C1044/A3231592319344352544643413744395148415038404031354841323130371Italy C1044/A323
Corsicana Airport C10511645119404653595347494048445246434339454334444843333231381Corsicana Airport C1051
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Tyler-Longview-Marshall
Longview C19/A127/C6442504421364245415142434142394941524534384432384342352320402Longview C19/A127/C644
Tyler Airport Relocated C821546021404460525044444448435248494540444535454544383022401Tyler Airport Relocated C82
Karnack C85/AFHP3031503223364341475547443841394847474838384729384140342916361Karnack C85/AFHP303
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
El Paso-Juarez
El Paso UTEP C12/A125/X151/G125237405347516260394342464557474139NANANANANANANANANANANANA2El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X1591403548414664603439404142494834394138353936403433343228431Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1373943395062593543414241564539464530324436412640343137441Chamizal C41/AH126
Socorro Hueco C49/F3121534652486063664054424545595542464640435039424643363636461Socorro Hueco C49/F312
Skyline Park C721394150464755531643414547524737454344435134413639354137521Skyline Park C72
Ivanhoe C414/F5141NA4049424969634444424443574839454841435039NA3638333335421Ivanhoe C414/F514
Ojo De Agua C1021/FG121/FG2211384154485357504245434645594743494643464740414341383041501Ojo De Agua C1021/FG121/FG221
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Waco
Waco Mazanec C10371643617324252554643434047415550445139414436374842333026391Waco Mazanec C1037
Temple Georgia C10451613217394452605446454449425052465236394239424943353229401Temple Georgia C1045
Killeen Skylark Field C10471703918415056716251494952485558515540474845465248403534441Killeen Skylark Field C1047
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 269722720353946565542313936484543402135473638424332NANANA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412NA6130NA33394335143378NANANA454124364337363841322716242West Orange C9/A141
Port Arthur West C28/A128/A228158613623374148525044374437474746422637453739NANANANANANA1Port Arthur West C28/A128/A228
Hamshire C64/C6541677130213747495551443451375048474225394541404543313017281Hamshire C64/C654
SETRPC Port Arthur C6281 N646441254046495754474048404950494534384935434346313120301SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541596144304042425448454344394748454229365037414445373218301SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N677531253843556158473949415551514828385143424346373217281SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431596132223439465150393442354443983927364237414244332920261SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1606428223742535153443842374946464326374437404141313017251Nederland High School C1035
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Austin
Austin North Hills Drive C3/A3222584016334351565044414346384947424334393639414841312825392Austin North Hills Drive C3/A322
Audubon C38159358NA4249535142394244424351434537393839404641333226381Audubon C38
Dripping Springs School C6141 N5844153144546259464353514747544548424336NANANANANANANANA1Dripping Springs School C614
CAPCOG Lake Georgetown C6901 N6237123342495952444141444043514245NANANANANANANANANANANA1CAPCOG Lake Georgetown C690
Lockhart C16041 N564032344849605243404851444847424231NANANANANANANANANANA1Lockhart C1604
CAPCOG Bastrop CAMS16121 N51403529374255444141404741454541423261NANANANANANANANANA1CAPCOG Bastrop CAMS1612
CAPCOG Elgin C16131 N6040143543495744434346494450454343394434364652NANANANANA1CAPCOG Elgin C1613
CAPCOG East Austin C16191 N5437163342485449423941433852454141333734373849NANANANANA1CAPCOG East Austin C1619
CAPCOG Round Rock Brushy Creek W C16201 N61391234434958494239414438464641NANANANANANANANANANANANA1CAPCOG Round Rock Brushy Creek W C1620
CAPCOG San Marcos Staples Road C16751 N564035303650585446404247425146434352NANANANANANANANANANA1CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Houston-Galveston-Brazoria
Houston East C1/G3162625723183741575750423043365045464224324440344140302718172Houston East C1/G316
Houston Aldine C8/AF108/X150 2607120234246706154473452425449454333394642514341313217272Houston Aldine C8/AF108/X150
Channelview C15/AH115 3545721234241484949413351404845434229334337354138323018243Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542715917213845595650433347354545424029344233404238312625242Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239160552722414547544942334939524645423241NA42424442322917231Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451505038233839414645363142364239373425333629344137212616211Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1666239224551555250463951434645444133274240514841323018261Houston Bayland Park C53/A146
Conroe Relocated C78/A3211695423284146598563543550425453524637715439475246343232281Conroe Relocated C78/A321
Manvel Croix Park C841575734214454534948443752444644454034344244464540313018241Manvel Croix Park C84
Clinton C403/C304/AH113 3515234193940474642333043374133373332313637423933323016223Clinton C403/C304/AH113
Houston North Wayside C405/C10331615818203538545245382740374438393428333837423837272815211Houston North Wayside C405/C1033
Houston Monroe C4061474123132737394242332339283634343324343132333432262113161Houston Monroe C406
Lang C4082696123144048535348442947394643413925304037403938322723222Lang C408
Houston Croquet C4092585627174246534848433548NANANA423930294241494640332818232Houston Croquet C409
Houston Westhollow C410/C30031575334173746494444373444374239403527283834394036282616191Houston Westhollow C410/C3003
Park Place C4161635524183742495348422846364542433830273940404138322815211Park Place C416
Houston Harvard Street C4171726345194047565851473248415046444029314443444242353022231Houston Harvard Street C417
Sheldon C5511 N555722224139515148383150384743424031374336444036313115241Sheldon C551
Baytown Wetlands Center C5521 N524925194040404646363146384637363728314136384137262917211Baytown Wetlands Center C552
Crosby Library C5531 N576021113129435150402849375242433928344339404239272620201Crosby Library C553
West Houston C5541 N686424234253595350433549434845444031334336454940323326241West Houston C554
La Porte Sylvan Beach C5561 NNA5135213840414746373045384339383825304135354136252820211La Porte Sylvan Beach C556
Mercer Arboretum C5571 NNANA12233845695852463146384946444132384438444338292819231Mercer Arboretum C557
Tom Bass C5581 N585330174047504746413148384341423830403940424440322815211Tom Bass C558
Katy Park C5591 N575532213751504745393545394541393631333933424338313022251Katy Park C559
Atascocita C5601 N615623NA33375653513924433446413936283342NA343936242615211Atascocita C560
Meyer Park C5611 N706016203842665548432942374642433930354235414138272621231Meyer Park C561
Bunker Hill Village C5621 N635623204250514946423646414542423731314036464438283022231Bunker Hill Village C562
Huffman Wolf Road C5631 N635422224038525254452947375348464231344541424442292821221Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N636124184444535254443249405245462830374340NANANANANANANA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N586325224343485452443553415344434231384644NANANANANANANA1Wallisville Road C617
Texas City 34th St. C620 1 N626156334848525859524153475250434335404949NANANANANANANA1Texas City 34th St. C620
UH Moody Tower C6951 N664640204142515448433148384743434034274241464340322917221UH Moody Tower C695
UH WG Jones Forest C6981 N734625254044636359503449405047484326334330424336312826241UH WG Jones Forest C698
Lynchburg Ferry C1015/A165 1585627193739424849393340345048464227344639354542252518201Lynchburg Ferry C1015/A165
Lake Jackson C1016 1585350164154504851444652464545464137394142494744403422261Lake Jackson C1016
Baytown Garth C101715965282243444855NA483754425547474532394847434846333029271Baytown Garth C1017
Galveston 99th St. C1034/A320/X183157515124455046515547374541504645433332NANA4047443829NANA1Galveston 99th St. C1034/A320/X183
UH Smith Point C16061 N585552274243475353463953415245454632404843NANANANANANANA1UH Smith Point C1606
Oyster Creek C1607 1 N615454224856525355464447524849484645384747525146423822311Oyster Creek C1607
UH Launch Trailer C16111 N684828174143525348442949394944454129274242444140323017221UH Launch Trailer C1611
Liberty Sam Houston Library C16261 N706033234240535654453554416451494733644646434744343127291Liberty Sam Houston Library C1626
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
San Antonio
San Antonio Northwest C232594435273551594644374443455044424231333438385339313331362San Antonio Northwest C23
Camp Bullis C58 1644735304158665348344747455450464735383539405341323433381Camp Bullis C58
Calaveras Lake C59157463531425061424230424540504844453544NANA28574131NANANA1Calaveras Lake C59
Elm Creek Elementary C5011 N5142292536535344413646444446434029NANANANANANANANANANANA1Elm Creek Elementary C501
Fair Oaks Ranch C5021 N61433329415762524741434245524946473543384338NANANANANANA1Fair Oaks Ranch C502
Bulverde Elementary C5031 N52403227354763524538434241504931NANANANANANANANANANANANA1Bulverde Elementary C503
New Braunfels Airport C5041 N483327253139504544364048394742383926NANANANANANANANANANA1New Braunfels Airport C504
City of Garden Ridge C5051 N46352924324054434034424440464325NANANANANANANANANANANANA1City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N4937312536445647463740474047433940263932343617NANANANANA1Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N544135284047624245394651444844413932413538425539343030371Heritage Middle School C622
CPS Pecan Valley C6781 N38311917263742323127333735353230292332252926NANANANANANA1CPS Pecan Valley C678
Government Canyon C16101 N5238272336565547433744444652454243353933NANANANANANANANA1Government Canyon C1610
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Corpus Christi-Victoria
Corpus Christi West C42474142274252504442434055474845434235443935434944403532302Corpus Christi West C4
Corpus Christi Tuloso C211514243264152504543413758474643414130413834425142353527261Corpus Christi Tuloso C21
Victoria C871464340244146534644414362395145444334373937445043333531251Victoria C87
AreaMonitoring SitePOCNovember 2021POCMonitoring Site
12345678910111213141516171819202122232425262728
Lower Rio Grande Valley
Mission C43/AP1431454042324251564643404959504644444326344834465540383032411Mission C43/AP143
Harlingen Teege C10231444142404546464546404143504941413934384934484839352931371Harlingen Teege C1023
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.