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Peak Daily One-Hour Ozone Averages for February 2018

The table below lists the peak daily one-hour ozone concentrations measured in February 2018 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 2018POCMonitoring Site
12345678910111213141516171819202122
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2452933422117322832233725232225323817262123212Ft. Worth Northwest C13/AH302
Keller C172393135422419353233NANA29252325323718272324212Keller C17
Midlothian OFW C52/A1371433433462317333928223832242126344419272524211Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571423237432419373135243832262526313619272725221Denton Airport South C56/A163/X157
Arlington Municipal Airport C611423233432317313728223827262028334317272523201Arlington Municipal Airport C61
Dallas North No.2 C63/C6791413632432216313626223631251628323719252423201Dallas North No.2 C63/C679
Rockwall Heath C691484834422114313822213638271426343716252523181Rockwall Heath C69
Grapevine Fairway C70/A301/X1821423335432418362931233831252427323817272124201Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711444032422215264124203629241529333021293623191Kaufman C71/A304/X071
Granbury C73/C6811483339472220354033283826222426353916292426221Granbury C73/C681
Eagle Mountain Lake C75 1433137452420383336274029252527353820282426221Eagle Mountain Lake C75
Parker County C761443534432421343836283831242427293523292827221Parker County C76
Cleburne Airport C77/C6821473633472218323930243730232327344019282725201Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3433632442416333426223832261526334022252324203Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40214335294221143036NA21NA30231627323715272424221Dallas Executive Airport C402
Greenville C1006/A1981413730402117314022223433251528313215302924191Greenville C1006/A198
Pilot Point C10321403535402420363430243633262426303418242826211Pilot Point C1032
Italy C1044/A3231454034422014334226213730231726362916252423191Italy C1044/A323
Corsicana Airport C10511484231422415264324173629231828362923313122171Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442483831473217173527202531231728343121312936202Longview C19/A127/C644
Tyler Airport Relocated C821473733453919193827192931241627333124393121191Tyler Airport Relocated C82
Karnack C85/AFHP3031413628403115163422142231271530342722373034221Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
El Paso-Juarez
El Paso UTEP C12/A125/X1512413946454338465456434039332719283232373840452El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15913240NANA4134445249393637302616183030303638401Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1414050504842495559464140363021243536394238491Chamizal C41/AH126
Socorro Hueco C49/F3121384443434337455055413538332718293130283737421Socorro Hueco C49/F312
Skyline Park C721434847484848475555464043383225233235NA4044511Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N474542444239404636413636373537373940394738333BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141364047454645465353433538362920213235353939461Ivanhoe C414
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
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Waco
Waco Mazanec C1037144393140NANANANA26213627211927383123282422201Waco Mazanec C1037
Temple Georgia C10451473728311914313725233528181426442924282423191Temple Georgia C1045
Killeen Skylark Field C10471493735372115342521213224152228463227322524201Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2373726263331163034231820182125292727312624262Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412393928263433183337232022212326282724NA2321232West Orange C9/A141
Port Arthur West C28/A128/A2281393634253731203436272121162426282826312724271Port Arthur West C28/A128/A228
Hamshire C64/C6541373630333534202839252319192627323129332726271Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C16541423637323937202939262322212629313128332928271SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C6431413735283836213441262223192427312927342725281SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1403632273634203239261918182326292727322623261Nederland High School C1035
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Austin
Austin Northwest C3/A3222473729472213323423213431141323412625282421182Austin Northwest C3/A322
Audubon C381453727462011283523203129111322412724282320161Audubon C38
St. Edwards University C16051 N413225472215273119192926121419352627242118151St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Houston-Galveston-Brazoria
Houston East C1/G316240302528231692431162220163130303132322622162Houston East C1/G316
Houston Aldine C8/AF108/X150 243332627261811NA23202322172629292937332719112Houston Aldine C8/AF108/X150
Channelview C15/AH115 338332632241713332618116172629303327272020143Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542413428312322132927232626152427272734312821142Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391393331303223162135202118132730293130322825261Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451353229253329192236221715152224282421312523251Seabrook Friendship Park C45
Houston Bayland Park C53/A146 139332630272291833172121142227312830322820101Houston Bayland Park C53/A146
Conroe Relocated C78/A3211433830273228143632242726192831292243383024161Conroe Relocated C78/A321
Manvel Croix Park C841NA343237322292536242321112328273330322825241Manvel Croix Park C84
Clinton C403/C304/AH113 3293225322615102125132118152020202429282220163Clinton C403/C304/AH113
Houston North Wayside C405131302328201610232512191915192222233227211591Houston North Wayside C405
Houston Monroe C40613829303229211221312019181026262631263326331Houston Monroe C406
Lang C4082393226262021112228202122162529262730303119122Lang C408
Houston Croquet C409276312732282292032202019122225272828312621112Houston Croquet C409
Houston Westhollow C4101403426302622122132222223152226312931312821131Houston Westhollow C410
Park Place C416136292828291972130171817102425262928302521141Park Place C416
Baytown Wetlands Center C5521 N29302525261681731111817131212161516231516131Baytown Wetlands Center C552
La Porte Sylvan Beach C5561 NNANANANANA1410162010151111111615161618141261La Porte Sylvan Beach C556
Tom Bass C5581 N281824222219311301013134192421182528251891Tom Bass C558
Katy Park C5591 N322818211717713191520209151820182422221281Katy Park C559
Atascocita C5601 N383326203015626311020161218222123342717841Atascocita C560
Meyer Park C5611 N302621201916102114141919141820212126252213101Meyer Park C561
HRM-3 Haden Road C603/A114 1 N3633293326189262816NA15142526282931272168161HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N413830343525173941202624202629343132362830271Wallisville Road C617
Texas City 34th St. C620 1 N403735263730212535222322172527272829332726281Texas City 34th St. C620
UH Moody Tower C6951 N3833283229219193219201913232526282830272291UH Moody Tower C695
UH WG Jones Forest C6981 N443629302921133627222525182829292440353024141UH WG Jones Forest C698
UH West Liberty C6991 N403427223020112937192320172631282828332525131UH West Liberty C699
Lynchburg Ferry C1015/A165 1343226202723132931181919152630262326302223201Lynchburg Ferry C1015/A165
Lake Jackson C1016 1393635303124201636232220152528262728322926281Lake Jackson C1016
Baytown Garth C10171393830353523163740192422182527332830372828271Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831393435283335212534252020172625232626362526241Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N403635283324201740232118152426262629312826291Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
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San Antonio
San Antonio Northwest C232443928542916303020233038102223352836282423182San Antonio Northwest C23
Camp Bullis C58 1454030492815313519223241152424363137272522661Camp Bullis C58
Calaveras Lake C5914639NANA2617312424183332162526363233312423191Calaveras Lake C59
Heritage Middle School C6221 N463624572417272722163030152122313032272221161Heritage Middle School C622
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Corpus Christi-Victoria
Corpus Christi West C42473835482723211919292728192426252729292924152Corpus Christi West C4
Corpus Christi Tuloso C211473434462520191925252432132225263726262520101Corpus Christi Tuloso C21
Victoria C87143333038221817232323252612NANANANANANA1724121Victoria C87
Holly Road C6601 N30242232151310101119171873NA-3NA-1-2NANA-31Holly Road C660
Violet C6641 N23272537161213131119182471516152920182723171Violet C664
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Lower Rio Grande Valley
Mission C43/AP1431513434372222182219372233302524252726242530131Mission C43/AP143
Harlingen Teege C10231473836452022182218312429204025263030252626121Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441413634382521113223311529302023323125252624121Laredo 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.