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Peak Daily One-Hour Ozone Averages for November 2019

The table below lists the peak daily one-hour ozone concentrations measured in November 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 SitePOCNovember 2019
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23940555016464726394734
Keller C1723938534924343826374834
Frisco C31/C68014140565528423230414936
Midlothian OFW C52/A13714045535222404222405033
Denton Airport South C56/A163/X15713737525017383230424838
Arlington Municipal Airport C6113438515222414119364732
Dallas North No.2 C63/C67913839545324393726414835
Rockwall Heath C6914237565027463530394936
Grapevine Fairway C70/A301/X18213838525120383329414535
Kaufman C71/A304/X07114144535425474032435237
Granbury C73/C68114142534521383629384427
Eagle Mountain Lake C75 14339565017312332404837
Parker County C7614140545040322732384429
Cleburne Airport C77/C68214346585921495021396036
Dallas Hinton St. C401/C60/AH161 33436514723353724424633
Dallas Executive Airport C40214144545321424225375137
Greenville C1006/A19813840525129423132424839
Pilot Point C103214137585726413633424936
Italy C1044/A32314250555122493825415233
Corsicana Airport C105114151535835503829445836
AreaMonitoring SitePOCNovember 2019
Longview C19/A127/C64423749404639423029445142
Tyler Airport Relocated C8213751474734383530425446
Karnack C85/AFHP30314047404941452130415430
AreaMonitoring SitePOCNovember 2019
El Paso-Juarez
El Paso UTEP C12/A125/X151/G12524246504441542916413425
Ascarate Park SE C37/A332/A172/X159136NANA4235512220NANANA
Chamizal C41/AH126 14544534434542418403725
Socorro Hueco C49/F31214147575440472527444325
Skyline Park C7213946504839512625413933
Ivanhoe C414/F51413842484145472127415226
AreaMonitoring SitePOCNovember 2019
Waco Mazanec C103714555625335544218435632
Temple Georgia C104513951585938433221465630
Killeen Skylark Field C104713750596238433720425228
AreaMonitoring SitePOCNovember 2019
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23443464943553218375527
West Orange C9/A14123840455144543420395029
Port Arthur West C28/A128/A22813540455144513520395338
Hamshire C64/C65413840485246573420425642
SETRPC 40 Sabine Pass C640/C165413641505347513522425543
SETRPC Mauriceville 42 C642/C311/C6651 N4243505144713822405631
SETRPC 43 Jefferson Co Airport C643141444754475538NANANANA
Nederland High School C1035 13640434943523020385134
AreaMonitoring SitePOCNovember 2019
Austin Northwest C3/A32223749535636403516385131
Audubon C3813650575640393715385026
Dripping Springs School C6141 N4162685841434315465634
CAPCOG Lake Georgetown C6901 N4054636442473319475631
Gorzycki Middle School C16031 N4157615842454418435534
Lockhart C16041 N4456555641453515475933
St. Edwards University C16051 N3445494631353314394527
CAPCOG Bastrop CAMS16121 N3746474935413913425331
CAPCOG Elgin C16131 N2938393827322612334422
CAPCOG San Marcos Staples Road C16751 N4759574340474014475133
CAPCOG Hutto College Street C66021 N4358575941453321496036
AreaMonitoring SitePOCNovember 2019
Houston East C1/G31623435493834492310364824
Houston Aldine C8/AF108/X150 23842714342603417405626
Channelview C15/AH115 33341464340503317NANANA
Northwest Harris Co. C26/A110/X15423645614453643419425332
Hou.DeerPrk2 C35/235/1001/AFH139FP23913841494449563418445430
Seabrook Friendship Park C4513638454341542717354822
Houston Bayland Park C53/A146 14146585049624218375234
Conroe Relocated C78/A32113944584841523022406026
Manvel Croix Park C8414145524344553213394937
Clinton C403/C304/AH113 33441474141503414374731
Houston North Wayside C40513037573536502812364721
Houston Monroe C40613637454325NA2712394634
Lang C40823439533841512411355029
Houston Croquet C40923642504040533214324933
Houston Westhollow C41013847554244583616385133
Park Place C41613840494442532612355032
Sheldon C5511 N3542473740493418394915
Baytown Wetlands Center C5521 N3840474544513220475427
Crosby Library C5531 N4043514644533218375323
West Houston C5541 N3647564244553215414932
La Porte Sylvan Beach C5561 N3637464441513217385220
Mercer Arboretum C5571 N1528423131391025154
Tom Bass C5581 N4042514345543115385135
Katy Park C5591 N3548563946613219454929
Atascocita C5601 N3737514143523416375522
Meyer Park C5611 N3542694344603NA2051NA
Bunker Hill Village C5621 N303NA4036403214374928
Huffman Wolf Road C5631 N4347564746553721395525
HRM-3 Haden Road C603/A114 1 N3639484041523014374728
Wallisville Road C617 1 N4042504949533823425728
Danciger C618 1 N4556514243544118424836
Texas City 34th St. C620 1 N4141514948633923465941
UH Moody Tower C6951 N3641494341542914385237
UH WG Jones Forest C6981 N3945674643593221465923
UH West Liberty C6991 N4343524440523018355128
Lynchburg Ferry C1015/A165 13435464242501912304717
Lake Jackson C1016 14053524243573515444836
Baytown Garth C101713840494848523621395628
Galveston 99th St. C1034/A320/X18313839505046604622315646
Oyster Creek C1607 1 N294040353347309314128
AreaMonitoring SitePOCNovember 2019
San Antonio
San Antonio Northwest C2325353654039394016434431
Camp Bullis C58 14844654638393817444432
Calaveras Lake C5915258604335402915444734
Elm Creek Elementary C5011 N4751623935393015423929
Fair Oaks Ranch C5021 N4145684639414116434332
Bulverde Elementary C5031 N3848675038383416424633
New Braunfels Airport C5041 N4254524435383414424729
City of Garden Ridge C5051 N4755564433363415394428
Seguin Outdoor Learning Center C5061 N4152504435413011454633
Heritage Middle School C6221 N4952564034392812404430
CPS Pecan Valley C6781 N5450584333362811434229
Government Canyon C16101 N4342613935353515393726
AreaMonitoring SitePOCNovember 2019
Corpus Christi-Victoria
Corpus Christi West C424553513934493712444639
Corpus Christi Tuloso C2114653524035503613475136
Victoria C8714651474538503813464838
AreaMonitoring SitePOCNovember 2019
Lower Rio Grande Valley
Mission C43/AP14314648503530403010423832
Harlingen Teege C102314148473733423011373833
AreaMonitoring SitePOCNovember 2019
Laredo Vidaurri C44/AFGP144/P24414356563933383213383530
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.