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Peak Daily One-Hour Ozone Averages for February 2020

The table below lists the peak daily one-hour ozone concentrations measured in February 2020 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 SitePOCFebruary 2020POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 24545423029444040372124252725434736332737333830412Ft. Worth Northwest C13/AH302
Keller C1724142392726413541352223232929444534353137384034392Keller C17
Frisco C31/C68014147413025423544382226293435474937363138414035381Frisco C31/C680
Midlothian OFW C52/A13714545403028454043332124252733444435292941374238451Midlothian OFW C52/A137
Denton Airport South C56/A163/X15714446402827443644362328253328485043363238404335381Denton Airport South C56/A163/X157
Arlington Municipal Airport C6114042382626413740332020242531433929282637333833401Arlington Municipal Airport C61
Dallas North No.2 C63/C67914045422925413443362126262931464632292937373934391Dallas North No.2 C63/C679
Rockwall Heath C6914244422826413543362129283136434531303440444236401Rockwall Heath C69
Grapevine Fairway C70/A301/X18214242382626433641342225253327474335333238403932401Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07113846423125413943352030293137424532363438414136431Kaufman C71/A304/X071
Granbury C73/C68114140412528403841362425302834434639352938424234411Granbury C73/C681
Eagle Mountain Lake C75 14444422829454043382430273329475041393140424335431Eagle Mountain Lake C75
Parker County C7614244412431433944372430323032464743393139424238411Parker County C76
Cleburne Airport C77/C68214545392729444243392424292835465038343040384936441Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 33943392525403238352225272830444128293038353527403Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40214346443028413641362123213238484632302838363832411Dallas Executive Airport C402
Greenville C1006/A19814445422925423643382029303135424631313237414034371Greenville C1006/A198
Pilot Point C103214448392927433644372429273633515444383536404235361Pilot Point C1032
Italy C1044/A32314345392924414040351827272634414835343540364032431Italy C1044/A323
Corsicana Airport C10511454642342241374237NA28253037434632353539414033451Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64424546453820374543383027263337373728333336414332472Longview C19/A127/C644
Tyler Airport Relocated C8214547473624404445402828253339414334353337434336491Tyler Airport Relocated C82
Karnack C85/AFHP30314452453817324845403631293539383732353237434532461Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X151/G12524240393935383741403827384642444542433831304945402El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X1591NANANANANANANANANA2726344437414339323633315445381Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14543434037404044464027434940525348413730325853461Chamizal C41/AH126
Socorro Hueco C49/F31214949414040394043464027375042464644404035335347421Socorro Hueco C49/F312
Skyline Park C7214444434238404042424128414945484948474533354848431Skyline Park C72
Ivanhoe C414/F51414347424135403948443927414841474845413833305449431Ivanhoe C414/F514
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Waco
Waco Mazanec C103714549403127424944361725262937414542343442414635461Waco Mazanec C1037
Temple Georgia C104514549393230424745361819273036413941293241424936421Temple Georgia C1045
Killeen Skylark Field C104714445383029414545381919322938414438293340405137431Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 24456464127394755423216143135454929272335394945402Beaumont-Downtown C2/A112/C2002
West Orange C9/A14124055453925334462423017223133393531252334375044422West Orange C9/A141
Port Arthur West C28/A128/A22814355443929384454413115NA3335384526151535414441351Port Arthur West C28/A128/A228
Hamshire C64/C65414556464027384753413213193336435328272035395045391Hamshire C64/C654
SETRPC Port Arthur C6281 N45584640314047524235NANANANANANANANANANANANANANA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165414355443929394548423417213236445432232234394743401SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N4866514333435365473924233841454032322839446049461SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64314558494232404664433518223435455934282438404745431SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 14256464028334550413315213334434029252335384643421Nederland High School C1035
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Austin
Austin Northwest C3/A3222435139332842434338191724333441423517NANANANANANA2Austin Northwest C3/A322
Audubon C3814250403228414145381415233133393537272837405135431Audubon C38
St. Edwards University C16051 N3845353424373937321514202832383826242434374633381St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G316244534340123747513523662735343730251033324640342Houston East C1/G316
Houston Aldine C8/AF108/X150 2445441371540495337228133538374023251837395440342Houston Aldine C8/AF108/X150
Channelview C15/AH115 3445241381240444927238133234344424241335384536333Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542445643391740515538229153840444830291737415442382Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391445343391539465537255103336376429281334385042371Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451435039362138444730237123139336422181930344937331Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1475445421642485341257124036396229251435425644371Houston Bayland Park C53/A146
Conroe Relocated C78/A3211NANA40381740525038251116NA34394028282235375442401Conroe Relocated C78/A321
Manvel Croix Park C841475542381439464839235113440385623261535385343341Manvel Croix Park C84
Clinton C403/C304/AH113 341473836123335543620763336353828201434384438323Clinton C403/C304/AH113
Houston North Wayside C405135433531113337453319792932323321201532334334281Houston North Wayside C405
Houston Monroe C406141494036223742493723382833344629221032334341441Houston Monroe C406
Lang C408244514139154047503721593234354426221133355240342Lang C408
Houston Croquet C4092444940371337434737224103434345529241032375241342Houston Croquet C409
Houston Westhollow C4101455041381539485237227123536375430251334405241351Houston Westhollow C410
Park Place C4161NANA383718374250372358303535422924931344441341Park Place C416
Sheldon C5511 N465242371441464930219143537333923231837415343341Sheldon C551
Baytown Wetlands Center C5521 N4552373420374552382410143536376525241837405246311Baytown Wetlands Center C552
Crosby Library C5531 N414837311137424933185102931323819171433354038311Crosby Library C553
West Houston C5541 N2134323110232745301232162430392310827264135251West Houston C554
La Porte Sylvan Beach C5561 N445342361439444934257153339356724191834375043321La Porte Sylvan Beach C556
Mercer Arboretum C5571 N435040341339525134197113337363521231835375538331Mercer Arboretum C557
Tom Bass C5581 N45524137183844523822493137346228261134364944341Tom Bass C558
Katy Park C5591 N455041381841485435208133437425327231336405139351Katy Park C559
Atascocita C5601 N415039351438455032219133135343621232035385641311Atascocita C560
Meyer Park C5611 N4754443917425356402410133641403928271836415142381Meyer Park C561
Bunker Hill Village C5621 N435039351438454936206103636355023211333395240301Bunker Hill Village C562
Huffman Wolf Road C5631 N4656443816434953392311163637374329282438436045371Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N43504036123741513021793137353925231334384438311HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N4855433924414857422911153639394629272137415347381Wallisville Road C617
Danciger C618 1 N15214543184349524225NANANANANANANANANANANANANANA1Danciger C618
Texas City 34th St. C620 1 N5057484531445256432610203945458539312340425349441Texas City 34th St. C620
UH Moody Tower C6951 N455444391340465440235122425173229271334394944371UH Moody Tower C695
UH WG Jones Forest C6981 N465544391641535138231116373741392829213730NANANA1UH WG Jones Forest C698
UH West Liberty C6991 N435142351439455036239143434324132241935365541341UH West Liberty C699
Lynchburg Ferry C1015/A165 137534238835435128227112835344324231532344536331Lynchburg Ferry C1015/A165
Lake Jackson C1016 14751464322424848422651637444760322920374453NA321Lake Jackson C1016
Baytown Garth C101714452403824394554402810143336374528261935385245361Baytown Garth C1017
Galveston 99th St. C1034/A320/X18314951464135424552403121223642416038262136425248421Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N4247433927384552392610213242436530302334454845411Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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San Antonio
San Antonio Northwest C2324251364327414441342219303736413836292732395237412San Antonio Northwest C23
Camp Bullis C58 14654343427454736311617343840393332282532385537441Camp Bullis C58
Calaveras Lake C5914753404628425049352317273946464135312836435340451Calaveras Lake C59
Fair Oaks Ranch C5021 NNANANANANANANANANANANANANANANANANANANANA345034401Fair Oaks Ranch C502
Bulverde Elementary C5031 NNANANANANANANANANANANANANANANANANANANANA334834391Bulverde Elementary C503
New Braunfels Airport C5041 NNANANANANANANANANANANANANANA323731282330354936391New Braunfels Airport C504
City of Garden Ridge C5051 NNANANANANANANANANANANANANANANANANANANA31384836411City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 NNANANANANANANANANANANANANANANANANANANA30364837371Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N4248343622344139291713262112151212191824222727211Heritage Middle School C622
CPS Pecan Valley C6781 NNANANANANANANANANANANANANANANA4033262225364836381CPS Pecan Valley C678
Government Canyon C16101 NNANANANANANANANANANANANANANANANANANANANANA4533401Government Canyon C1610
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42464942383139464138212193838403223221424404135342Corpus Christi West C4
Corpus Christi Tuloso C2114546403624394139362017114035443725261729444741391Corpus Christi Tuloso C21
Victoria C8714852434219394844392010143937473726241734405140361Victoria C87
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14314140373325393538312418124739393127281827394135431Mission C43/AP143
Harlingen Teege C102314142383629403738332221113736392823262123374035371Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2020POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24414146323426404641374011324242385035392225404238431Laredo 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.