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Peak Daily One-Hour Ozone Averages for February 2017

The table below lists the peak daily one-hour ozone concentrations measured in February 2017 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 2017POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2523136303231433328474043372844474748303945542Ft. Worth Northwest C13/AH302
Keller C172563340313530433331494044383144485351263742552Keller C17
Frisco C31/C6801533339314032433338524444373443475057284045611Frisco C31/C680
Midlothian OFW C52/A1371533537313433443849514844402945475349344248601Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571553338303934453334514747373247544858273945661Denton Airport South C56/A163/X157
Arlington Municipal Airport C611493232313128403233484138362841444943253540521Arlington Municipal Airport C61
Dallas North No.2 C63/C67915433353115NA393136524642373343505153293941611Dallas North No.2 C63/C679
Rockwall Heath C691533436303531403437485142373442475154273638551Rockwall Heath C69
Grapevine Fairway C70/A301/X1821553439313530413329514243373043484853283840571Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711533236323227464042474440403444505252273946571Kaufman C71/A304/X071
Granbury C73/C6811503236313531443536504344393245485147333847531Granbury C73/C681
Eagle Mountain Lake C75 1533141333634453532534546383246495253354048561Eagle Mountain Lake C75
Parker County C761443238303433413335474343373043474745343847541Parker County C76
Cleburne Airport C77/C6821533536343533494440554448423349506049344153601Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3533536323731403332524643393344464849283541573Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40215342383334324033NA504542383040455048253542521Dallas Executive Airport C402
Greenville C1006/A1981513538323531473641514542373446525147274044561Greenville C1006/A198
Pilot Point C10321503337303631443237534944353443474551243946601Pilot Point C1032
Italy C1044/A3231553640323427464243495045403045515351273948571Italy C1044/A323
Corsicana Airport C10511513138313226464548473842423243515655323749561Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442452842352133484946453736393146515243324145512Longview C19/A127/C644
Tyler Airport Relocated C821483340332630474946483641413646565050344245541Tyler Airport Relocated C82
Karnack C85/AFHP3031452838331430454839443237403140525543363539401Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X1512404735404138373842435038363844434355534435262El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591384737404238354044424838344146424053504333241Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1414337434441404042465438363846464555544437261Chamizal C41/AH126
Socorro Hueco C49/F3121414341514237373940464738344143414153494337281Socorro Hueco C49/F312
Skyline Park C721424940444344434447445444374146474658544635291Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N464547424643464743504548394049474647544850403BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414042333535NANA3738384835323740414551484436221Ivanhoe C414
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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Waco
Waco Mazanec C10371583237313528414943504748402944525354283846561Waco Mazanec C1037
Temple Georgia C10451604436333431434944575355413648566056304351671Temple Georgia C1045
Killeen Skylark Field C10471594133343133454443554751373446535654304251641Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23944343737335158614332293031415939432736NA592Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412383733343532344053402930333339524246263547562West Orange C9/A141
Port Arthur West C28/A128/A2281413835383435344659443429373442584442283955681Port Arthur West C28/A128/A228
Hamshire C64/C6541404438383734485355433232343340644143284050601Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C16541272426292825203753473729384046615148384259771SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C6431424135403736385355433531343443584444314123661SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1414133393634415459423430323441584243293852621Nederland High School C1035
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Austin
Austin Northwest C3/A3222563931322428464339494046333447485460293948702Austin Northwest C3/A322
Audubon C381593928332527444338534047353346515453313847651Audubon C38
St. Edwards University C16051 NNANANANANANANANANANANANANANANANANA48233540631St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Houston-Galveston-Brazoria
Houston East C1/G3162443827253330434853392336322840493445282738692Houston East C1/G316
Houston Aldine C8/AF108/X150 2454036293431455349392538362944463053303746702Houston Aldine C8/AF108/X150
Channelview C15/AH115 3424933283128435053302535312944463543213240663Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542423533313128384747412231383044523244253546562Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391374231333029414556372629322843513743263143711Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451444837353430424562403030323543594347253745751Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1373532282826394855392231292842512942232944661Houston Bayland Park C53/A146
Conroe Relocated C78/A3211494137323734455447473040363148574754304050581Conroe Relocated C78/A321
Manvel Croix Park C841444434333331424963422231313248583645243850721Manvel Croix Park C84
Clinton C403/C304/AH113 3364237283228334653352433322844473942273541613Clinton C403/C304/AH113
Houston North Wayside C4051393735272927364455372136302639443043283337461Houston North Wayside C405
Houston Monroe C4061353623262724333945332124262636463036212938651Houston Monroe C406
Lang C4082413430282826364745382334312740453143232741592Lang C408
Houston Croquet C4092413932303128404858402231312844533246253146662Houston Croquet C409
Houston Westhollow C4101403333262826415053392131292738503142243243601Houston Westhollow C410
Park Place C4161404030293128384452382331322841523440242938661Park Place C416
Sheldon C5511 N353733292929363941312633312937373137253036481Sheldon C551
Baytown Wetlands Center C5521 N223128262020293644301520232133432927172228461Baytown Wetlands Center C552
La Porte Sylvan Beach C5561 NNA2622212019252632221618191926312623162024371La Porte Sylvan Beach C556
Mercer Arboretum C5571 N373535343332374037362935333337383341323338421Mercer Arboretum C557
Tom Bass C5581 N37383030282635425531NANANANANANANANANANANANA1Tom Bass C558
Katy Park C5591 N353131272723254043331828272639453235203240491Katy Park C559
Atascocita C5601 NNANANANANANANANANA5565589610369101Atascocita C560
Meyer Park C5611 N342930252423324036332028332335392437232637421Meyer Park C561
Huffman Wolf Road C5631 N534841383536495860493351393550544664324053741Huffman Wolf Road C563
Clear Brook High School C5701 N414333323129394460402628323131573641243443731Clear Brook High School C570
Clear Creek High School C5711 N404431282726393151352430263038473236202944661Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N434536283331455359392639343046503446283444731HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N425036343533465656422637373344554050263945711Wallisville Road C617
Danciger C618 1 N423833313329404554422428303646573543273746611Danciger C618
Texas City 34th St. C620 1 N444740403635364666473430363747604643304152781Texas City 34th St. C620
UH Moody Tower C6951 N42433627NA29424952411114312944545043243546711UH Moody Tower C695
U of H-Sugarland C6961 N453534333430415262432532313244554948263547611U of H-Sugarland C696
UH Coastal Center C6971 N40383637333135425743NANANANANANANANANANANANA1UH Coastal Center C697
UH WG Jones Forest C6981 N464238313633445146452838373147544053343949581UH WG Jones Forest C698
UH West Liberty C6991 N454036313132415151422641362943534059243442571UH West Liberty C699
Lynchburg Ferry C1015/A165 1354024282324364049282228282731454032202535551Lynchburg Ferry C1015/A165
Lake Jackson C1016 14441353633333136NA402925323645613440293547591Lake Jackson C1016
Baytown Garth C10171425037343435485164493237363243563949263745701Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831434637413941314652463731334046605646314055811Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N383830323028273551452826323535513334233043551Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
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San Antonio
San Antonio Northwest C232523829302325403945494244403242505054324347532San Antonio Northwest C23
Camp Bullis C58 1543931322126434244514844403446555356354453551Camp Bullis C58
Calaveras Lake C591543530232830474249463341363545554754314752571Calaveras Lake C59
Heritage Middle School C6221 N543329222628474148473341343445555254323853571Heritage Middle School C622
CPS Pecan Valley C6781 N473023182326393442433536322840514648284246521CPS Pecan Valley C678
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Corpus Christi-Victoria
Corpus Christi West C4244403131NANANANANA192325374151565444304364782Corpus Christi West C4
Corpus Christi Tuloso C211483929273227374352402224323847514842273758701Corpus Christi Tuloso C21
Victoria C871514235273329464956422427303748574351254047591Victoria C87
Violet C6641 N453624232623374052361719263544494538203948691Violet C664
Ingleside C6851 N474233343327384452412124354245554442273948551Ingleside C685
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Lower Rio Grande Valley
Mission C43/AP1431424031222828455851382526313844514439353946521Mission C43/AP143
Brownsville C80/AGP1801423434292927304647312225344358504737313453621Brownsville C80/AGP180
Harlingen Teege C10231433835353227464848372326334252585340353551671Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441483323191626383945363025242635433943313939361Laredo 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

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.