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Daily Maximum Eight-Hour Ozone Averages for January 2015

The table below lists the peak daily maximum eight-hour ozone concentrations measured in January 2015 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 SitePOCJanuary 2015POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 29727302320322730271717201928303637384331303029392622363023NA2Ft. Worth Northwest C13/AH302
Keller C17291029282421322530291818192024293336364833312726352929382825NA2Keller C17
Frisco C31/C6801111419312625332633282020202026263538325239352929382726493032NA1Frisco C31/C680
Midlothian OFW C52/A137110825292918332930282218181924353438414032312726373429493031NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571111130332722322834292022222329313741355136353133403531422928NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C6117622292714312829282117171924333237383331322725363326442827NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C67918820292419292529271917171823263237334935332626372422492830NA1Dallas North No.2 C63/C679
Rockwall Heath C691121819323127363035312220222126293540425741373127402627513333NA1Rockwall Heath C69
Grapevine Fairway C70/A301/X1821121326312222352734301921212127263638315136333129383023442927NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07111415203031243429322921NV202125343840443437343125373630513332NA1Kaufman C71/A304/X071
Granbury C73/C681197332928263330292617151922253336374144303229263734324030NVNA1Granbury C73/C681
Eagle Mountain Lake C75 1101131292622332931271620211827323438405031312727333327372824NA1Eagle Mountain Lake C75
Parker County C761111039333330383535322122242529404143465937363334414141433329NA1Parker County C76
Cleburne Airport C77/C68218630303123323028282016191828353739435035343127383637453032NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 387203124193227322919NANV1722233036NANV37342725392422493032NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40216618272414302628271915NV1321303136372933312724353126472827NA1Dallas Executive Airport C402
Greenville C1006/A1981131915312925343033282118232428283537435439343030382833523132NA1Greenville C1006/A198
Pilot Point C10321131521302623332533272023242228273538294636332931383230432929NA1Pilot Point C1032
Italy C1044/A3231111322272923312828282116151424323437422633322627363335NANV34NA1Italy C1044/A323
Corsicana Airport C10511131220292926332931292219182324353939482934NANV29353537523433NA1Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64421413112827NV313430311816212631394442484340342936413944613930NA2Longview C19/A127/C644
Tyler Airport Relocated C82116121330343233343331211918303137444251NANV353329393940683734NA1Tyler Airport Relocated C82
Karnack C85/AFHP3031161412273226353431332317242530324340494041342636373437583832NA1Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X1512213142302118232222232222131818303333302839353527291824283028NA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591192537272716252424201923152019162328202335262631292826213027NA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1202943272614232220222418131618253235332534283432292822282924NA1Chamizal C41/AH126
Socorro Hueco C49/F31212121423426182726262526261621202728383131393432333122322833NVNA1Socorro Hueco C49/F312
Skyline Park C721223545363224272827252527182125303338362944343537383531333330NA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N16NVNANANANV362925232525NV1825264141364144303335403629304830NA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141172538302722242423212123141724262935252634252931322728252925NA1Ivanhoe C414
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Waco
Waco Mazanec C10371111322293030312928282217151629343840493330342630383540503431NA1Waco Mazanec C1037
Temple Georgia C104518615232016262326262116171729333841504627352833414042483830NA1Temple Georgia C1045
Killeen Skylark Field C10471131028323238363027282218192031364245525430373137424444533930NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2172011252634323121271816191823374943434741292539413350474526NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A141218158192427312920251818191819334338424441302635393247434226NA2West Orange C9/A141
Port Arthur West C28/A128/A2281151910222332313021272320191924344538434546302939413550494526NA1Port Arthur West C28/A128/A228
Hamshire C64/C6541152110252637333220252020181723375043454742343038413652614827NA1Hamshire C64/C654
SETRPC Port Arthur C6281 N23292028NVNV202010262622212130364841474747353039454051514832NA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541172012232332313023272320201922364234394237322836393440464127NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N182013252636333222302220NV1824374640464940302737423647484827NA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431NANANANANANV292819231918161622324236424439302636403347464524NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1172111232635323021242020191925NVNV41454443322939413550494626NA1Nederland High School C1035
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Austin
Austin Northwest C3/A322286243022283126202117131415NV2836395242253128313934NV433524NA2Austin Northwest C3/A322
Audubon C3819729312734332724231814151528NV3742504926332930383845483927NA1Audubon C38
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31621484232015302517181311141320234144414132312236352435463321NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 216148262218312719241716152028274343454534352739393147454026NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 31510526229292718221416151627263937343730322635383035403424NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542201410262427302620231819152328374140494730292733383241483426NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23911242242122282717211314131224293936384234372334342432443524NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451166224232732312123141517NV23364237334439402340392828483929NA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 114106261723292717191214NV1926204040464336402536363339483422NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A3211241711283031333223271919192630374244525135322835403544593626NA1Conroe Relocated C78/A321
Manvel Croix Park C8411267282123302917211414131724274241474938432640373345503827NA1Manvel Croix Park C84
Clinton C403/C304/AH113 313104231910292718201113151523223039333330332227282029392222NA3Clinton C403/C304/AH113
Houston North Wayside C405113114222210282518221312141521162839363631322123282228362522NA1Houston North Wayside C405
Houston Monroe C40611144211620252316181111121220223733414133372133332530403122NA1Houston Monroe C406
Lang C408214117252021262215201512121822213938444329272234373136453222NA2Lang C408
Houston Croquet C40921287261727272716181213121826204042484937412640363241503624NA2Houston Croquet C409
Houston Westhollow C410114129241925272417191315131924284038444132362435343039433422NA1Houston Westhollow C410
Houston Texas Avenue C4111117423161426241418911111519173341393429332132322330383020NA1Houston Texas Avenue C411
Park Place C4161105422131925251517810NV1221183740454534392034352431453222NA1Park Place C416
Sheldon C5511 N141272425103028212416171618242637373539293025323629373932NANA1Sheldon C551
Baytown Wetlands Center C5521 N127220201825251719130121118222423263225261825242025332418NA1Baytown Wetlands Center C552
Crosby Library C5531 N13115232415282719231416151724313837414634322533363038533224NA1Crosby Library C553
West Houston C5541 N1613824NVNV292418211616142126324241484634382636373239503524NA1West Houston C554
La Porte Sylvan Beach C5561 N1564262328313121251716161423253534294335362639372729393028NA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N17157232419292719231515151924263535414133302230332737353024NA1Mercer Arboretum C557
Tom Bass C5581 N1054221523252414171111111420233536414133362134312332442923NA1Tom Bass C558
Katy Park C5591 N16128232023262118201515122022283533403629332332322835382921NA1Katy Park C559
Atascocita C5601 N13115222214262417221313141622273333363731292029312536392721NA1Atascocita C560
Meyer Park C5611 N201510262523302720241617162026293939444533312634373242473426NA1Meyer Park C561
Bunker Hill Village C5621 N13117231823262516181213121724213837433932372233333037443222NA1Bunker Hill Village C562
Huffman Wolf Road C5631 NNVNA7222216NVNANA251718171928343837444739292633373242593426NA1Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N14104262113302716221514151526274143414734372638362839473627NA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N17136303025363324271922202032374743475539383237433648623930NA1Wallisville Road C617
Danciger C618 1 N151215302941323423241820152228434545514745442942413849474233NA1Danciger C618
Mustang Bayou C619 1 N1567262838313221251716151426384341454441482638383541493927NA1Mustang Bayou C619
Texas City 34th St. C620 1 N171332727283432272719191818263650404548444228404129NV534330NA1Texas City 34th St. C620
UH Moody Tower C6951 N15NVNV27NV30NV28NV20NVNVNVNV252341474948344023NV37NV39543822NA1UH Moody Tower C695
U of H-Sugarland C6961 N1397251629262715NV1114111723294042474537422438333140463227NA1U of H-Sugarland C696
UH Coastal Center C6971 N1493222227282719221514141222283525263134392331312433403021NA1UH Coastal Center C697
UH WG Jones Forest C6981 N221514282934333122271818182531384347525535302738413850533828NA1UH WG Jones Forest C698
UH West Liberty C6991 N16151028302534NV243020201921313946424953NV332839413748654230NA1UH West Liberty C699
Lynchburg Ferry C1015/A165 11373242018262616201414121321202928273232352629312427372521NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 11677292838303222231616131727374444504547492941413850484231NA1Lake Jackson C1016
Baytown Garth C1017115115252522NV3223271921201929374542475640383035423444613829NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X183112215272538313521NVNANANANANANV494344NV44493040413447NV4231NA1Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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San Antonio
San Antonio Northwest C23210725342431343223222114151428344043564130333033363341473830NA2San Antonio Northwest C23
Camp Bullis C581NANV27322630353323231915171430334042513829333238383342463629NA1Camp Bullis C58
Calaveras Lake C5919722322737322918221915141225314143525128292836333439433429NA1Calaveras Lake C59
Heritage Middle School C6221 N9623302737312818202114141124324242555329302936353441413627NA1Heritage Middle School C622
CPS Pecan Valley C6781 N6217262228NV261619181010624293941534426282532342937453626NA1CPS Pecan Valley C678
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4214412332833242721151815141223373641424235312536393543353531NA2Corpus Christi West C4
Corpus Christi Tuloso C21115512333129302921182117131323354344484330302638403744383836NA1Corpus Christi Tuloso C21
Victoria C871161014302136312821192018131826384144483939372639383542433524NA1Victoria C87
Aransas Pass C6591 NNANANANANANANANANANANANANANANANANANANANANANANANANANV47383834NA1Aransas Pass C659
Holly Road C6601 N1105292531272722141514121118373542413833292334353643353531NA1Holly Road C660
Violet C6641 N12411332732282519172017121122333942464232272836NVNVNVNANANANA1Violet C664
Odem C6861 N13613322831282820182118141325363940454132272837383743353635NA1Odem C686
Taft C6871 N168173533343133252124211917294242453531383533322427212103NA1Taft C687
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP1431106828222223221615202610816NV2735293225192326252833272529NA1Mission C43/AP143
Brownsville C80/AGP18018432926313021175152611917293339383727202536283738343436NA1Brownsville C80/AGP180
Harlingen Teege C102311591035313835282019243216112336394742433428NV36324044373640NA1Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2015POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P244175193023212524161418246619261838424121242631312532353133NA1Laredo 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 - 0.059
51 - 100 Not Defined 0.06 - 0.075
101 - 150 0.125 - 0.164 0.076 - 0.095
151 - 200 0.165 - 0.204 0.096 - 0.115
201 - 300 0.205 - 0.404 0.116 - 0.374
301 - 400 0.405 - 0.504 Not Defined
401 - 500 0.505 - 0.604 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 beginning 1/1/2013, 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.