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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
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 252313630323143332847404337284447474830392Ft. Worth Northwest C13/AH302
Keller C17256334031353043333149404438314448535126372Keller C17
Frisco C31/C680153333931403243333852444437344347505728401Frisco C31/C680
Midlothian OFW C52/A137153353731343344384951484440294547534934421Midlothian OFW C52/A137
Denton Airport South C56/A163/X157155333830393445333451474737324754485827391Denton Airport South C56/A163/X157
Arlington Municipal Airport C61149323231312840323348413836284144494325351Arlington Municipal Airport C61
Dallas North No.2 C63/C67915433353115NA39313652464237334350515329391Dallas North No.2 C63/C679
Rockwall Heath C69153343630353140343748514237344247515427361Rockwall Heath C69
Grapevine Fairway C70/A301/X182155343931353041332951424337304348485328381Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071153323632322746404247444040344450525227391Kaufman C71/A304/X071
Granbury C73/C681150323631353144353650434439324548514733381Granbury C73/C681
Eagle Mountain Lake C75 153314133363445353253454638324649525335401Eagle Mountain Lake C75
Parker County C76144323830343341333547434337304347474534381Parker County C76
Cleburne Airport C77/C6821533536343533494440554448423349506035NANA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 353353632373140333252464339334446484928353Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40215342383334324033NA504542383040455044NANA1Dallas Executive Airport C402
Greenville C1006/A198151353832353147364151454237344652514727401Greenville C1006/A198
Pilot Point C1032150333730363144323753494435344347455124391Pilot Point C1032
Italy C1044/A323155364032342746424349504540304551535127391Italy C1044/A323
Corsicana Airport C1051151313831322646454847384242324351565532371Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Longview C19/A127/C644245284235213348494645373639314651524332412Longview C19/A127/C644
Tyler Airport Relocated C82148334033263047494648364141364656505034421Tyler Airport Relocated C82
Karnack C85/AFHP303145283833143045483944323740314052554336351Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X151240473540413837384243503836384443435553442El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159138473740423835404442483834414642405350431Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 141433743444140404246543836384646455554441Chamizal C41/AH126
Socorro Hueco C49/F312141434151423737394046473834414341415349431Socorro Hueco C49/F312
Skyline Park C72142494044434443444744544437414647465854461Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N46454742464346474350454839404947464754483BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41414042333535NANA373838483532374041455148NA1Ivanhoe C414
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Waco Mazanec C1037158323731352841494350474840294452535428381Waco Mazanec C1037
Temple Georgia C1045160443633343143494457535541364856605630431Temple Georgia C1045
Killeen Skylark Field C1047159413334313345444355475137344653565430421Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 239443437373351586143322930314159394327362Beaumont-Downtown C2/A112/C2002
West Orange C9/A141238373334353234405340293033333952424626352West Orange C9/A141
Port Arthur West C28/A128/A228141383538343534465944342937344258444228391Port Arthur West C28/A128/A228
Hamshire C64/C654140443838373448535543323234334064414328401Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C1654127242629282520375347372938404661514838421SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C643142413540373638535543353134344358444431411SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 141413339363441545942343032344158424329381Nederland High School C1035
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Austin Northwest C3/A322256393132242846433949404633344748546029392Austin Northwest C3/A322
Audubon C38159392833252744433853404735334651545331381Audubon C38
St. Edwards University C16051 NNANANANANANANANANANANANANANANANANA4823NA1St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Houston East C1/G316244382725333043485339233632284049344528272Houston East C1/G316
Houston Aldine C8/AF108/X150 245403629343145534939253836294446305330372Houston Aldine C8/AF108/X150
Channelview C15/AH115 342493328312843505330253531294446354321323Channelview C15/AH115
Northwest Harris Co. C26/A110/X154242353331312838474741223138304452324425352Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239137423133302941455637262932284351374326311Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45144483735343042456240303032354359434725371Seabrook Friendship Park C45
Houston Bayland Park C53/A146 137353228282639485539223129284251294223291Houston Bayland Park C53/A146
Conroe Relocated C78/A321149413732373445544747304036314857475430401Conroe Relocated C78/A321
Manvel Croix Park C84144443433333142496342223131324858364524381Manvel Croix Park C84
Clinton C403/C304/AH113 336423728322833465335243332284447394227NA3Clinton C403/C304/AH113
Houston North Wayside C405139373527292736445537213630263944304328331Houston North Wayside C405
Houston Monroe C406135362326272433394533212426263646303621NA1Houston Monroe C406
Lang C408241343028282636474538233431274045314323NA2Lang C408
Houston Croquet C409241393230312840485840223131284453324625NA2Houston Croquet C409
Houston Westhollow C410140333326282641505339213129273850314224NA1Houston Westhollow C410
Park Place C416140403029312838445238233132284152344024NA1Park Place C416
Sheldon C5511 N35373329292936394131263331293737313725301Sheldon C551
Baytown Wetlands Center C5521 N22312826202029364430152023213343292717NA1Baytown Wetlands Center C552
La Porte Sylvan Beach C5561 NNA262221201925263222161819192631262316201La Porte Sylvan Beach C556
Mercer Arboretum C5571 N37353534333237403736293533333738334132331Mercer Arboretum C557
Tom Bass C5581 N37383030282635425531NANANANANANANANANANA1Tom Bass C558
Katy Park C5591 N35313127272325404333182827263945323520321Katy Park C559
Atascocita C5601 NNANANANANANANANANA5565589610361Atascocita C560
Meyer Park C5611 N34293025242332403633202833233539243723261Meyer Park C561
Huffman Wolf Road C5631 N53484138353649586049335139355054466432401Huffman Wolf Road C563
Clear Brook High School C5701 N41433332312939446040262832313157344124341Clear Brook High School C570
Clear Creek High School C5711 N40443128272639315135243026303743313620291Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N43453628333145535939263934304650344628341HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N42503634353346565642263737334455405026391Wallisville Road C617
Danciger C618 1 N42383331332940455442242830364657354327371Danciger C618
Texas City 34th St. C620 1 N44474040363536466647343036374760464330411Texas City 34th St. C620
UH Moody Tower C6951 N42433627NA2942495241111431294454504324351UH Moody Tower C695
U of H-Sugarland C6961 N45353433343041526243253231324455494826351U of H-Sugarland C696
UH Coastal Center C6971 N40383637333135425743NANANANANANANANANANA1UH Coastal Center C697
UH WG Jones Forest C6981 N46423831363344514645283837314754405334391UH WG Jones Forest C698
UH West Liberty C6991 N45403631313241515142264136294353405924341UH West Liberty C699
Lynchburg Ferry C1015/A165 135402428232436404928222828273145403220251Lynchburg Ferry C1015/A165
Lake Jackson C1016 14441353633333136NA40292532364561344029351Lake Jackson C1016
Baytown Garth C1017142503734343548516449323736324356394926371Baytown Garth C1017
Galveston 99th St. C1034/A320/X183143463741394131465246373133404660564631401Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N38383032302827355145282632353551333423301Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
San Antonio
San Antonio Northwest C23252382930232540394549424440324250505432432San Antonio Northwest C23
Camp Bullis C58 154393132212643424451484440344655535635441Camp Bullis C58
Calaveras Lake C59154353023283047424946334136354555475431471Calaveras Lake C59
Heritage Middle School C6221 N54332922262847414847334134344555525432381Heritage Middle School C622
CPS Pecan Valley C6781 N47302318232639344243353632284051464828421CPS Pecan Valley C678
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C4244403131NANANANANA19232537415156544430432Corpus Christi West C4
Corpus Christi Tuloso C21148392927322737435240222432384751484227371Corpus Christi Tuloso C21
Victoria C87151423527332946495642242730374857435125401Victoria C87
Violet C6641 N45362423262337405236171926354449453820391Violet C664
Ingleside C6851 N47423334332738445241212435424555444227391Ingleside C685
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP143142403122282845585138252631384451443935391Mission C43/AP143
Brownsville C80/AGP180142343429292730464731222534435850473731341Brownsville C80/AGP180
Harlingen Teege C1023143383535322746484837232633425258534035351Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2017POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P244148332319162638394536302524263543394331391Laredo 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.