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Daily Maximum Eight-Hour Ozone Averages for February 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in February 2018 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 2018POCMonitoring Site
12345678910111213141516171819202122
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2382429341716282227223422141823293317251921NA2Ft. Worth Northwest C13/AH302
Keller C1723428303419183127NVNANANV202023303317252222NA2Keller C17
Midlothian OFW C52/A1371392830391819303425233525191722313216252122NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571383032321919312730243528202024293117252224NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C611372829361718283124223424191525293319252021NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C6791373128341718283122243328191423282818242121NA1Dallas North No.2 C63/C679
Rockwall Heath C691444230341815273117253427241321312617232122NA1Rockwall Heath C69
Grapevine Fairway C70/A301/X1821393029342118312523243527191624303117242223NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711403530372015243721243227201725302621282822NA1Kaufman C71/A304/X071
Granbury C73/C6811422934392119313431263525172124323516281923NA1Granbury C73/C681
Eagle Mountain Lake C75 1402934372119332832263727202325303318272124NA1Eagle Mountain Lake C75
Parker County C761413133332220313533273528192225283318272225NA1Parker County C76
Cleburne Airport C77/C6821413230392017293526243526192025313419262122NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3383228361719292820253528181321293117232122NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40213829263515162629NANVNANV181523283119252222NA1Dallas Executive Airport C402
Greenville C1006/A1981393228291915273420253130221624282519272423NA1Greenville C1006/A198
Pilot Point C10321373131302120323026243428231724283018222325NA1Pilot Point C1032
Italy C1044/A32313935303617162637232132271912213122162319NVNA1Italy C1044/A323
Corsicana Airport C10511423830382213233922223225201826322424292721NA1Corsicana Airport C1051
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Tyler-Longview-Marshall
Longview C19/A127/C6442413527403013133123182428181625312123302726NA2Longview C19/A127/C644
Tyler Airport Relocated C821NV3531403215183624232729181825302425362919NA1Tyler Airport Relocated C82
Karnack C85/AFHP3031363425342615133018142229231528322018332832NA1Karnack C85/AFHP303
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
El Paso-Juarez
El Paso UTEP C12/A125/X1512333541394036394243413833282113232830333736NA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159127NVNANANV35424234353434231811162726323435NA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1333446444539454341443833272317173233384033NA1Chamizal C41/AH126
Socorro Hueco C49/F3121303937383936424339373234282214252727253534NA1Socorro Hueco C49/F312
Skyline Park C7213242454346444548474438393327212130NVNANV41NA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N444040423735384234373433363335353636314130NA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141323643404143434643413435302318192931333836NA1Ivanhoe C414
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Waco
Waco Mazanec C1037138352835NANANANANV203125171524332621262220NA1Waco Mazanec C1037
Temple Georgia C10451433326231816273123243224151323372523262221NA1Temple Georgia C1045
Killeen Skylark Field C1047146353029181730NV18222923131725412925282221NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2343422223017142427181517NV1823252424302422NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412363625233221152731181621161924NV2421NANVNVNA2West Orange C9/A141
Port Arthur West C28/A128/A2281363427233225162933201820122224242522302423NA1Port Arthur West C28/A128/A228
Hamshire C64/C6541353328263228152436212018172426272525312524NA1Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C16541403333273631162634211720172427282925302624NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C6431373427243427162735211821162226262623322523NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 137342723NV26152735211517142125242422312422NA1Nederland High School C1035
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Austin
Austin Northwest C3/A322244342234161526301620292781220372124272119NA2Austin Northwest C3/A322
Audubon C38142352333171326301919282571120382422261918NA1Audubon C38
St. Edwards University C16051 N3930203314122326151726246917321922231816NA1St. Edwards University C1605
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Houston-Galveston-Brazoria
Houston East C1/G316236252121181191619142014102528252425282315NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 23731202223149NANV142215121926261827302511NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 333301925221214211915115121926212420211613NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542383222242016142318182319132025241929282515NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239136312725301810162918191172327262527302622NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451323027193126111930201614111923232326272221NA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 13630202524191117NV14201581625272127302615NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A3211403427242820153028202520152428261834342516NA1Conroe Relocated C78/A321
Manvel Croix Park C841NANV2631302010213220211472127252728302721NA1Manvel Croix Park C84
Clinton C403/C304/AH113 328302123201313162091914121519161724241913NA3Clinton C403/C304/AH113
Houston North Wayside C405127271521199111715818141013191916242420NVNA1Houston North Wayside C405
Houston Monroe C40613527252625181116251917115212422252728242NA1Houston Monroe C406
Lang C408235301722161611162113201492025241727272512NA2Lang C408
Houston Croquet C409239282226251910182818181361924252226282516NA2Houston Croquet C409
Houston Westhollow C4101373220262220122027182116102024282027292616NA1Houston Westhollow C410
Park Place C41613227222224159152316171042023232226272317NA1Park Place C416
Baytown Wetlands Center C5521 N2328181623148142691611999101217171311NA1Baytown Wetlands Center C552
La Porte Sylvan Beach C5561 NNANANANANANV813157139681412111616129NA1La Porte Sylvan Beach C556
Tom Bass C5581 N2416181019162825612921622141223262315NA1Tom Bass C558
Katy Park C5591 N262611181513611141017147121617122120189NA1Katy Park C559
Atascocita C5601 N30312116261082221518129111818141923104NA1Atascocita C560
Meyer Park C5611 N26241816171312171210181511141819152222209NA1Meyer Park C561
HRM-3 Haden Road C603/A114 1 N323121252112131817NVNANV919232323232519NVNA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N363625283223162336142520172226272626NV2423NA1Wallisville Road C617
Texas City 34th St. C620 1 N343530223524NV2030202117132225242425302523NA1Texas City 34th St. C620
UH Moody Tower C6951 N35302223231810152517181372024NV22252825NVNA1UH Moody Tower C695
UH WG Jones Forest C6981 N4234242526151529241924191422NV2719NV3127NVNA1UH WG Jones Forest C698
UH West Liberty C6991 N3632232128171525321522161421262618232923NVNA1UH West Liberty C699
Lynchburg Ferry C1015/A165 13030221725NV141920111815121428171920191914NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 137343127292291432211915132426242529302825NA1Lake Jackson C1016
Baytown Garth C10171333626273221152236142317152223262426322722NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X18313532332032311422332218151524NV212428302424NA1Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N3735332330NV1016372018131322252424273027NVNA1Oyster Creek C1607
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
San Antonio
San Antonio Northwest C23241342547221026241617273261620302328262018NA2San Antonio Northwest C23
Camp Bullis C58 1423527442210272815172935101721332228252119NA1Camp Bullis C58
Calaveras Lake C591NV37NANANV1328NV181630NV917223324302823NVNA1Calaveras Lake C59
Heritage Middle School C6221 N40322148211124221713272861719292028252016NA1Heritage Middle School C622
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Corpus Christi-Victoria
Corpus Christi West C42413632402521191715252624142025232727282722NA2Corpus Christi West C4
Corpus Christi Tuloso C2114032313522181714172024251017232227252423NVNA1Corpus Christi Tuloso C21
Victoria C871382925321916161917192421NVNANANANANANANV15NA1Victoria C87
Holly Road C6601 N2523182413119951416154NV0NANANANANA0NA1Holly Road C660
Violet C6641 N23252023131012861418185915141918172118NA1Violet C664
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Lower Rio Grande Valley
Mission C43/AP1431403027321819172014302330191822232524222225NA1Mission C43/AP143
Harlingen Teege C1023141353036182016201628232792524252828242323NA1Harlingen Teege C1023
AreaMonitoring SitePOCFebruary 2018POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441343230291912102820241427221419242622222115NA1Laredo 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
  • 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.