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Daily Maximum Eight-Hour Ozone Averages for February 2016

The table below lists the peak daily maximum eight-hour ozone concentrations measured in February 2016 in each community where the TCEQ measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

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 with AQI colors
AreaMonitoring SitePOCFebruary 2016
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23237373639434238414230
Keller C1723837373844464338404230
Frisco C31/C68013636373541454238393625
Midlothian OFW C52/A13713939383443424239414232
Denton Airport South C56/A163/X1571NV39383944474438414523
Arlington Municipal Airport C6113737373341404137394121
Dallas North No.2 C63/C67914237373341444338393819
Rockwall Heath C6913635363342454138383920
Grapevine Fairway C70/A301/X18213838393641464439414226
Kaufman C71/A304/X07114137363240434137394129
Granbury C73/C68113840404046484341424540
Eagle Mountain Lake C75 13436383746464239414534
Parker County C7614340394148484442444840
Cleburne Airport C77/C68213940403946484441434439
Dallas Hinton St. C401/C60/AH161 33735362539444237383816
Dallas Executive Airport C40213832343139404036373830
Greenville C1006/A19813838383843464340414230
Pilot Point C103213336373739454238394230
Italy C1044/A32314140373845364338424121
Corsicana Airport C105114539363343354135384234
AreaMonitoring SitePOCFebruary 2016
Longview C19/A127/C64424044383945404341414243
Tyler Airport Relocated C8214142414145484542444843
Karnack C85/AFHP30313745384043444741414143
AreaMonitoring SitePOCFebruary 2016
El Paso-Juarez
El Paso UTEP C12/A125/X15123939373337343533303314
Ascarate Park SE C37/A332/A172/X1591353335363932273530329
Chamizal C41/AH126 14039392937393428303613
Socorro Hueco C49/F312139403639403433NV393613
Skyline Park C7214241403840383642403717
BRAVO Big Bend C67/C316/C656/C6913 NNVNA454545444043434142
Ivanhoe C41413938403836383437333415
AreaMonitoring SitePOCFebruary 2016
Waco Mazanec C103713840383946404539414328
Temple Georgia C104514043404146484741424429
Killeen Skylark Field C104714243404047464641424740
AreaMonitoring SitePOCFebruary 2016
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 22823363841304640404232
West Orange C9/A14122716333739324537373933
Port Arthur West C28/A128/A22813024384145374942424234
Hamshire C64/C65413327374245385142434739
SETRPC Port Arthur C6281 N2826373743405039414432
SETRPC 40 Sabine Pass C640/C165413426384345395343434543
SETRPC Mauriceville 42 C642/C311/C6651 N3124353939324539404132
SETRPC 43 Jefferson Co Airport C64312619323538314136363732
Nederland High School C1035 13323373945354941414538
AreaMonitoring SitePOCFebruary 2016
Austin Northwest C3/A32224346424350455145464547
Audubon C3814244404146424641424843
AreaMonitoring SitePOCFebruary 2016
Houston East C1/G31623730353545395138384836
Houston Aldine C8/AF108/X150 23941394044394942434437
Channelview C15/AH115 32437383738384437393430
Northwest Harris Co. C26/A110/X15423841363739354439404331
Hou.DeerPrk2 C35/235/1001/AFH139FP23913430333641364436354133
Seabrook Friendship Park C4512827353543374539404236
Houston Bayland Park C53/A146 13438363841364437NANANA
Conroe Relocated C78/A32114345414146395242444338
Manvel Croix Park C8413841384046424842434538
Clinton C403/C304/AH113 33131333738364334353623
Houston North Wayside C40513030303236314032333624
Houston Monroe C40613030293034343936363530
Lang C40823638353438384639404032
Houston Croquet C40923638343642374438394232
Houston Westhollow C41013740363844374638414432
Houston Texas Avenue C41113030293137334333323527
Park Place C41613029293237324033NANV27
Sheldon C5511 N3445434345435344454138
Baytown Wetlands Center C5521 N2126252729263026252922
Crosby Library C5531 N3746424245425345454536
West Houston C5541 N3538343542364537384531
La Porte Sylvan Beach C5561 N2330343440364035363534
Mercer Arboretum C5571 N2927272832273530313126
Tom Bass C5581 N3030313138334033333631
Katy Park C5591 N2733293137313733343625
Atascocita C5601 N3032303135314133323429
Meyer Park C5611 N3235323234323834343528
Bunker Hill Village C5621 N3639363741374538394331
Huffman Wolf Road C5631 N3744394044405343464436
HRM-3 Haden Road C603/A114 1 N3333363642384839394133
Wallisville Road C617 1 N3442383842404641424129
Danciger C618 1 N3540363843414439404635
Texas City 34th St. C620 1 N3127404145424741414335
UH Moody Tower C6951 N3637353641374639394232
U of H-Sugarland C6961 N3432313242364534344530
UH Coastal Center C6971 N32293638NA404639404336
UH WG Jones Forest C6981 N4046414045385142454736
UH West Liberty C6991 N3643394044415442444438
Lynchburg Ferry C1015/A165 12330333238344035343425
Lake Jackson C1016 13740414150485043434643
Baytown Garth C101713238373943394641NV4123
Galveston 99th St. C1034/A320/X18313528424449455144435243
AreaMonitoring SitePOCFebruary 2016
San Antonio
San Antonio Northwest C2324039373947434942414529
Camp Bullis C5814345414349445043444434
Calaveras Lake C5914243394047414841414926
Heritage Middle School C6221 N4443383946424741404929
CPS Pecan Valley C6781 N3434303239333732313719
AreaMonitoring SitePOCFebruary 2016
Corpus Christi-Victoria
Corpus Christi West C423944404245444542435031
Corpus Christi Tuloso C2113743384142424440434529
Victoria C8714147404245424742425434
Holly Road C6601 N3235333739353932374527
Odem C6861 N3642363944404240404731
Taft C6871 N3337323440374036374326
AreaMonitoring SitePOCFebruary 2016
Lower Rio Grande Valley
Mission C43/AP14313536343933353635353726
Brownsville C80/AGP18013842384344424342434529
Harlingen Teege C102313742394343434442NANV31
AreaMonitoring SitePOCFebruary 2016
Laredo Vidaurri C44/AFGP144/P24413838343741383937383628
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
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

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 beginning 1/1/2013, 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.