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Daily Maximum Eight-Hour Ozone Averages for February 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in February 2017 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 2017POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 24725302627273729314636412926404343412834394757313738202Ft. Worth Northwest C13/AH302
Keller C1724628342830273929304838433226404447473033375259304139212Keller C17
Frisco C31/C68014628332832293730344842423630394246473335395260344138211Frisco C31/C680
Midlothian OFW C52/A13714628303032293933NV4743413626404549443138415660334139301Midlothian OFW C52/A137
Denton Airport South C56/A163/X15714828302831304028304942443229424946493135405463344242191Denton Airport South C56/A163/X157
Arlington Municipal Airport C6114226292828243529304537373325374143382732354755323635221Arlington Municipal Airport C61
Dallas North No.2 C63/C679147282827NVNANV28314843403529394446463134375260333937231Dallas North No.2 C63/C679
Rockwall Heath C6914427312929263431314342403331394145453034334753334036231Rockwall Heath C69
Grapevine Fairway C70/A301/X18214729322829283729264939413428394243453033364656344038161Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07114730313128254134364338383831404646463035425054324139291Kaufman C71/A304/X071
Granbury C73/C68114527332930293932324837433229414546422934424751314341221Granbury C73/C681
Eagle Mountain Lake C75 14727342931314130335140443328424548472937435256334243241Eagle Mountain Lake C75
Parker County C7614227352931313829334539413228404343423133434950334142241Parker County C76
Cleburne Airport C77/C68214929323131304437355241463930444852453438475566334344301Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 34429302831273530294843413529393944442830365058333935183Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021NV37333030283028NANV4141362733434542273136NVNVNV3533191Dallas Executive Airport C402
Greenville C1006/A19814529323028273934364741403432414446423137405157364039261Greenville C1006/A198
Pilot Point C103214528312629283929324942413329404243423132404858343938211Pilot Point C1032
Italy C1044/A32314827353031254131384441403727394748462934405157304239211Italy C1044/A323
Corsicana Airport C105114630353027234236434434393927394849512935415155304244281Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64424226373311304242434334373732414847413036394662364343252Longview C19/A127/C644
Tyler Airport Relocated C8214526373224264440424432383933NV5147443139414967364445361Tyler Airport Relocated C82
Karnack C85/AFHP30314027353112273942374230373730364449383229333760354243241Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15123531243336373533323349373233373839474841322245494840262El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15912735283435333233342743373038393436474839272041454538161Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 13330253539373734313250373133344042495042322245515041231Chamizal C41/AH126
Socorro Hueco C49/F312132363239353234343033413630393934384447393123NVNANANANA1Socorro Hueco C49/F312
Skyline Park C7213038344038423936413653373238434444515044302750NV4840191Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N4544423843394541NVNV42433841474345454547NVNV47525147363BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414130322632NVNANANV343046342835343740444541311942474336161Ivanhoe C414
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Waco
Waco Mazanec C103714928342930253737394541423727404748463034415056314437291Waco Mazanec C1037
Temple Georgia C104515137342928264042375045483534455053493438465861354738311Temple Georgia C1045
Killeen Skylark Field C104715136312928274039374841483332444851483538465662364639291Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23736293531313541444021262828375133392332NANV53504251292Beaumont-Downtown C2/A112/C2002
West Orange C9/A14123632293129282633423923253029344937402430414448403948262West Orange C9/A141
Port Arthur West C28/A128/A22813935323632332836463926253232385242402435465353474250291Port Arthur West C28/A128/A228
Hamshire C64/C65413938333530323438454022262930365539382435444953494452291Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C1654126222427242318NV454431263538415748463437555958534755281SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C64314037323733343138454028273032385241412836NVNV52474152311SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 13936293632323138453926262931375140402736465151464051281Nederland High School C1035
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Austin
Austin Northwest C3/A322246362927212439393145334229334544495124NV455556434639272Austin Northwest C3/A322
Audubon C3815036292721233939334735433130434549482832455961424538261Audubon C38
St. Edwards University C16051 NNANANANANANANANANANANANANANANANANANV2531374846384033181St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31624131252530283741403423302526334427402223315252453951272Houston East C1/G316
Houston Aldine C8/AF108/X150 24033312630273944403322322829394026452333395654494152232Houston Aldine C8/AF108/X150
Channelview C15/AH115 33738312327263444402420272529394228341829364934494247183Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423932312529263344393720272930394526402333384752463949242Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23913035282728263439443421262627374734392129375649484049251Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4514033333130293537523524272930375142382233386253464351241Seabrook Friendship Park C45
Houston Bayland Park C53/A146 13329272426253141423520282528384527382027385552474449231Houston Bayland Park C53/A146
Conroe Relocated C78/A32114638332833303949404026343430445039492638445165494455281Conroe Relocated C78/A321
Manvel Croix Park C8414134293131293644533824282632445234402234456152514751221Manvel Croix Park C84
Clinton C403/C304/AH113 33332332829252836463122292627374231382229364843424448223Clinton C403/C304/AH113
Houston North Wayside C4051343032232624273641311829252734392437222833NV47414049181Houston North Wayside C405
Houston Monroe C4061322821242321283336291922222631402731182434NV41413541181Houston Monroe C406
Lang C40823728272426243240373420292327363925381924364949443946192Lang C408
Houston Croquet C40923831272829263442453721292630404830412129395551474349252Houston Croquet C409
Houston Westhollow C41013831302427253341423619282426334426382130375349444247221Houston Westhollow C410
Park Place C416137302627272631374334NV272527364430372126345246444046241Park Place C416
Sheldon C5511 N3232312728273236362724292829343528312329334135373538221Sheldon C551
Baytown Wetlands Center C5521 N1626272317172330352714182022303924221420253936303238161Baytown Wetlands Center C552
La Porte Sylvan Beach C5561 NNANV201917182122281915161818242822201518222728232328141La Porte Sylvan Beach C556
Mercer Arboretum C5571 N3534343232313338353227323133353531372931343840373641271Mercer Arboretum C557
Tom Bass C5581 N353026272624303745NVNANANANANANANANANANANANANANANANANA1Tom Bass C558
Katy Park C5591 N3128282025211935363016252326353925321930344342403943181Katy Park C559
Atascocita C5601 NNANANANANANANANANANV24446757246810871031Atascocita C560
Meyer Park C5611 N3126262123212736312918252423323419331924303542363338181Meyer Park C561
Huffman Wolf Road C5631 N4543383431334354514429413033475140522738466253564957281Huffman Wolf Road C563
Clear Brook High School C5701 NNV33282927283335483722252629NV5234NV20NV395449464248261Clear Brook High School C570
Clear Creek High School C5711 NNV352726262432NVNV3220262228NV3928NVNVNV385241403741181Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N3835322430283743463422302830394526402230385549494450231HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3841343129303747433823313131404838422437415756524252251Wallisville Road C617
Danciger C618 1 N4035302931283336504024262732425432382335415549495150291Danciger C618
Texas City 34th St. C620 1 N413936373233313853442727323242NVNV3825394465NV474554311Texas City 34th St. C620
UH Moody Tower C6951 N403232NVNANV3643453810122531405038392031405851484450271UH Moody Tower C695
U of H-Sugarland C6961 N4231303032293543534023302830405234412433405751475050281U of H-Sugarland C696
UH Coastal Center C6971 N373432352930293348NVNANANANANANANANANANA415950454551NA1UH Coastal Center C697
UH WG Jones Forest C6981 N4339332733294049403625353331455134492636455463504455271UH WG Jones Forest C698
UH West Liberty C6991 N3936322828293746433722333029394734452133NV4953463947191UH West Liberty C699
Lynchburg Ferry C1015/A165 13129222321222834332218222324264128261723294642393142141Lynchburg Ferry C1015/A165
Lake Jackson C1016 14137333432312933NANV24242832435433372334425451495151291Lake Jackson C1016
Baytown Garth C101713740343130323946514525313128384736402436405757524454281Baytown Garth C1017
Galveston 99th St. C1034/A320/X18314040343936372736494325273135415846422644456958545057331Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N3233283028NV2128444319242731NV4931312228384947414249241Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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San Antonio
San Antonio Northwest C2324435282418233237394334403033404544492937444454444342272San Antonio Northwest C23
Camp Bullis C58 14637292717233540404638403133434650493037494953474543261Camp Bullis C58
Calaveras Lake C5914433282221NV3639434330362930414943482839485254474444281Calaveras Lake C59
Heritage Middle School C6221 N4631262020263938414329352931415046482833485155484441281Heritage Middle School C622
CPS Pecan Valley C6781 N39292017172331323539293126283745404325344246NVNANANANA1CPS Pecan Valley C678
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42413626NVNANANANANANV22243438485347402738546453566152312Corpus Christi West C4
Corpus Christi Tuloso C2114334262229253037483721213035444843382532496050515146291Corpus Christi Tuloso C21
Victoria C8714336312430273544464023252733445039432737435348514347251Victoria C87
Violet C6641 N3932211624212633463315172432414641331933435644454640181Violet C664
Ingleside C6851 N4436272931252733463720243440434941392536415149435449301Ingleside C685
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14313936271825263345463322242935404439372934434343444835271Mission C43/AP143
Brownsville C80/AGP180138322927272628364527202331384647423527264554NVNANANANA1Brownsville C80/AGP180
Harlingen Teege C102314034272729253542463221243138444946393029475649514940281Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24413626211411202630413326222225334035392834353141343832231Laredo Vidaurri C44/AFGP144/P244
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, 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.