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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 239405550164647263947343330
Keller C17239385349243438263748343129
Frisco C31/C680141405655284232304149363530
Midlothian OFW C52/A137140455352224042224050333135
Denton Airport South C56/A163/X157137375250173832304248383433
Arlington Municipal Airport C61134385152224141193647322830
Dallas North No.2 C63/C679138395453243937264148353229
Rockwall Heath C69142375650274635303949363534
Grapevine Fairway C70/A301/X182138385251203833294145353330
Kaufman C71/A304/X071141445354254740324352373535
Granbury C73/C681141425345213836293844273533
Eagle Mountain Lake C75 143395650173123324048373534
Parker County C76141405450403227323844293634
Cleburne Airport C77/C682143465859214950213960363130
Dallas Hinton St. C401/C60/AH161 334365147233537244246332825
Dallas Executive Airport C402141445453214242253751373433
Greenville C1006/A198138405251294231324248393334
Pilot Point C1032141375857264136334249363532
Italy C1044/A323142505551224938254152333234
Corsicana Airport C1051141515358355038294458363535
AreaMonitoring SitePOCNovember 2019
Longview C19/A127/C644237494046394230294451423634
Tyler Airport Relocated C82137514747343835304254463642
Karnack C85/AFHP303140474049414521304154303633
AreaMonitoring SitePOCNovember 2019
El Paso-Juarez
El Paso UTEP C12/A125/X151/G125242465044415429164134252234
Ascarate Park SE C37/A332/A172/X159136NANA4235512220NANANA2129
Chamizal C41/AH126 145445344345424184037252234
Socorro Hueco C49/F312141475754404725274443252633
Skyline Park C72139465048395126254139332634
Ivanhoe C414/F514138424841454721274152262636
AreaMonitoring SitePOCNovember 2019
Waco Mazanec C1037145556253355442184356323434
Temple Georgia C1045139515859384332214656303731
Killeen Skylark Field C1047137505962384337204252283629
AreaMonitoring SitePOCNovember 2019
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 234434649435532183755273128
West Orange C9/A141238404551445434203950293328
Port Arthur West C28/A128/A228135404551445135203953383331
Hamshire C64/C654138404852465734204256423431
SETRPC 40 Sabine Pass C640/C1654136415053475135224255433430
SETRPC Mauriceville 42 C642/C311/C6651 N42435051447138224056313736
SETRPC 43 Jefferson Co Airport C643141444754475538214156373632
Nederland High School C1035 136404349435230203851343426
AreaMonitoring SitePOCNovember 2019
Austin Northwest C3/A322237495356364035163851313523
Audubon C38136505756403937153850263426
Dripping Springs School C6141 N41626858414343154656344130
CAPCOG Lake Georgetown C6901 N40546364424733194756313730
Gorzycki Middle School C16031 N41576158424544184355344029
Lockhart C16041 N44565556414535154759333631
St. Edwards University C16051 N34454946313533143945273221
CAPCOG Bastrop CAMS16121 N37464749354139134253313128
CAPCOG Elgin C16131 N29383938273226123344222621
CAPCOG San Marcos Staples Road C16751 N47595743404740144751333630
CAPCOG Hutto College Street C66021 N43585759414533214960363931
AreaMonitoring SitePOCNovember 2019
Houston East C1/G316234354938344923103648242422
Houston Aldine C8/AF108/X150 238427143426034174056263125
Channelview C15/AH115 33341464340503317NANANA3026
Northwest Harris Co. C26/A110/X154236456144536434194253323426
Hou.DeerPrk2 C35/235/1001/AFH139FP239138414944495634184454303127
Seabrook Friendship Park C45136384543415427173548222828
Houston Bayland Park C53/A146 141465850496242183752342927
Conroe Relocated C78/A321139445848415230224060263530
Manvel Croix Park C84141455243445532133949373028
Clinton C403/C304/AH113 334414741415034143747313026
Houston North Wayside C405130375735365028123647212721
Houston Monroe C40613637454325NA27123946342629
Lang C408234395338415124113550292722
Houston Croquet C409236425040405332143249332827
Houston Westhollow C410138475542445836163851333022
Park Place C416138404944425326123550322926
Sheldon C5511 N35424737404934183949153327
Baytown Wetlands Center C5521 N38404745445132204754273228
Crosby Library C5531 N40435146445332183753233435
West Houston C5541 N36475642445532154149323223
La Porte Sylvan Beach C5561 N36374644415132173852203328
Mercer Arboretum C5571 N15284231313910251546NA
Tom Bass C5581 N40425143455431153851353029
Katy Park C5591 N35485639466132194549293220
Atascocita C5601 N37375141435234163755223126
Meyer Park C5611 N3542694344603NA2051NANA23
Bunker Hill Village C5621 N303NA40364032143749282920
Huffman Wolf Road C5631 N43475647465537213955253529
HRM-3 Haden Road C603/A114 1 N36394840415230143747282823
Wallisville Road C617 1 N40425049495338234257283427
Danciger C618 1 N45565142435441184248363331
Texas City 34th St. C620 1 N41415149486339234659413534
UH Moody Tower C6951 N36414943415429143852373023
UH WG Jones Forest C6981 N39456746435932214659233430
UH West Liberty C6991 N43435244405230183551283230
Lynchburg Ferry C1015/A165 134354642425019123047172726
Lake Jackson C1016 140535242435735154448362927
Baytown Garth C1017138404948485236213956283125
Galveston 99th St. C1034/A320/X183138395050466046223156463337
Oyster Creek C1607 1 N2940403533473093141282023
AreaMonitoring SitePOCNovember 2019
San Antonio
San Antonio Northwest C23253536540393940164344313526
Camp Bullis C58 148446546383938174444323423
Calaveras Lake C59152586043354029154447343630
Elm Creek Elementary C5011 N47516239353930154239293329
Fair Oaks Ranch C5021 N41456846394141164343323526
Bulverde Elementary C5031 N38486750383834164246333523
New Braunfels Airport C5041 N42545244353834144247293226
City of Garden Ridge C5051 N47555644333634153944283425
Seguin Outdoor Learning Center C5061 N41525044354130114546333127
Heritage Middle School C6221 N49525640343928124044303225
CPS Pecan Valley C6781 N54505843333628114342293025
Government Canyon C16101 N43426139353535153937263123
AreaMonitoring SitePOCNovember 2019
Corpus Christi-Victoria
Corpus Christi West C4245535139344937124446392726
Corpus Christi Tuloso C21146535240355036134751362628
Victoria C87146514745385038134648383227
AreaMonitoring SitePOCNovember 2019
Lower Rio Grande Valley
Mission C43/AP143146485035304030104238322327
Harlingen Teege C1023141484737334230113738332427
AreaMonitoring SitePOCNovember 2019
Laredo Vidaurri C44/AFGP144/P244143565639333832133835302327
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.