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Daily Maximum Eight-Hour Ozone Averages for January 2017

The table below lists the peak daily maximum eight-hour ozone concentrations measured in January 2017 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 2017POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2243121182530343537333822104923121522393738NA2Ft. Worth Northwest C13/AH302
Keller C1723028202028323337373338191251120131419383636NA2Keller C17
Frisco C31/C68012133211928323335373038261372322151520373339NA1Frisco C31/C680
Midlothian OFW C52/A13712334222131333441403541NV952528111223383939NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X15713033212129333639393539211471820171723413539NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C61120301918283029363632362684192281119343635NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C6791213220192728313536323826942321111019373338NA1Dallas North No.2 C63/C679
Rockwall Heath C691193220202832323636303729126242313NANANANANANA1Rockwall Heath C69
Grapevine Fairway C70/A301/X18212432222130323435NANANV2313620211416NV383637NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711263720202934353838383935842727141221383439NA1Kaufman C71/A304/X071
Granbury C73/C68112335292228343639393540281261327151933414240NA1Granbury C73/C681
Eagle Mountain Lake C75 12730221922NV303134253722149723191928433640NA1Eagle Mountain Lake C75
Parker County C7613032252227323537363436231481120192235413838NA1Parker County C76
Cleburne Airport C77/C6821283928273338434546414638138NV33142127444445NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3183221NV293130373730382494191911817323538NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021NANANANV26282734342935NVNV3192086NV333636NA1Dallas Executive Airport C402
Greenville C1006/A19811035191928323337373539321242628141222363638NA1Greenville C1006/A198
Pilot Point C103212333212229323536373238221582019171918383138NA1Pilot Point C1032
Italy C1044/A3231293424182731333938353732422434111020383738NA1Italy C1044/A323
Corsicana Airport C10511303523192633343938394035852635151320383635NA1Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442735251420303338343440362526272917921353838NA2Longview C19/A127/C644
Tyler Airport Relocated C821163921192533363937NV3935305283216NV22383840NA1Tyler Airport Relocated C82
Karnack C85/AFHP30319332715183135363336403526282427171019342834NA1Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X1512374235373433353217292723222941332232343645NVNA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159138392931293034321623202022293929262529334340NA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 138433638332932291327291417254233213234384644NA1Chamizal C41/AH126
Socorro Hueco C49/F312136392932302734322425232325273930232932NV4339NA1Socorro Hueco C49/F312
Skyline Park C721414539413732373528NV312220294234253841414744NA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 NNV444034303135343535333530314738313142454747NA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141384233373331333321292721NV263729232835364540NA1Ivanhoe C414
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Waco
Waco Mazanec C10371363223182630333938363833722534131319NV3737NA1Waco Mazanec C1037
Temple Georgia C104514034342228353943424143361642635151423404544NA1Temple Georgia C1045
Killeen Skylark Field C104713835332227333841423942362052535141526424443NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
1234567891011121314151617181920212223
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 22133387122633353238363628313232252825303438NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A14121929367112832353235323332313027272622303235NA2West Orange C9/A141
Port Arthur West C28/A128/A228123364310133035383439373733353229312926313538NA1Port Arthur West C28/A128/A228
Hamshire C64/C654127364010142733383639373735343231282826333638NA1Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C165411927329102527302829232424242120181714191925NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C64312334409122934363440363633323230302925313539NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 12233399133035363640373836333332302624313537NA1Nederland High School C1035
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Austin
Austin Northwest C3/A3222353338192433374038363834303242722NV26264542NA2Austin Northwest C3/A322
Audubon C3813631352125333742403739352342222161227354442NA1Audubon C38
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
1234567891011121314151617181920212223
Houston-Galveston-Brazoria
Houston East C1/G316227343111122929353136363628322830222018303737NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 22635361113283135283332353032282816513303737NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 325363713143135353134322029292527211817263837NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X15422734361615323438333535363337302820918303638NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239125NV3611122730363336353628312727202222303536NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45124344318142935433941363036363040NANANANANANANA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 12733361012293135323534353232302818713333538NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A32112938391616323541373738413940333123920323940NA1Conroe Relocated C78/A321
Manvel Croix Park C84129404411143134383638373834373332192225343941NA1Manvel Croix Park C84
Clinton C403/C304/AH113 327332613132831362932313231332726191811283336NA3Clinton C403/C304/AH113
Houston North Wayside C40512532281213282935272929NANV2828251367242934NA1Houston North Wayside C405
Houston Monroe C406124313410112728332935333229302724181818263034NA1Houston Monroe C406
Lang C40822433341011283034283332332729272514211303236NA2Lang C408
Houston Croquet C409228353910122931363436353733353129201313323637NA2Houston Croquet C409
Houston Westhollow C41012634371111283235333333343333292716416323436NA1Houston Westhollow C410
Park Place C416126333491127293632NANV3430322827192015313435NA1Park Place C416
Sheldon C5511 N25313222222931322930302827282828222020273132NA1Sheldon C551
Baytown Wetlands Center C5521 N16202413132528322823202121212018161713202228NA1Baytown Wetlands Center C552
West Houston C5541 N27343713143033373435353534363028NVNANANANANANA1West Houston C554
La Porte Sylvan Beach C5561 N142435NVNANANANANANANV1416171515NVNVNANANANANA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N28313225253134353234333333343230262425303337NA1Mercer Arboretum C557
Tom Bass C5581 N25313410122728343134323230312826171918293234NA1Tom Bass C558
Katy Park C5591 N243134135232832283028282830262316715253034NA1Katy Park C559
Atascocita C5601 N2030311213282934313132322930282715710253134NA1Atascocita C560
Meyer Park C5611 N1926281112252730192627292527232312611232630NA1Meyer Park C561
Bunker Hill Village C5621 N2131341212283133301102328NANANANV30113134NANANA1Bunker Hill Village C562
Huffman Wolf Road C5631 N30394117183438424343424338393434221719394245NA1Huffman Wolf Road C563
Clear Brook High School C5701 N243538151220NV363636353730322929NVNANANV3637NA1Clear Brook High School C570
Clear Creek High School C5711 N233541111023293132NV323328292227NVNANANV3539NA1Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N273634131431333531323435262830292218183138NVNA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N35414216173438413838364236383634252622394141NA1Wallisville Road C617
Danciger C618 1 N27354112NV293338353131373539312925232200NVNA1Danciger C618
Texas City 34th St. C620 1 N29384417173238413939374035402834332931344042NA1Texas City 34th St. C620
UH Moody Tower C6951 N293740101229323834NV363630312829211818343840NA1UH Moody Tower C695
U of H-Sugarland C6961 N2837391213NV3338383838373740333024820353839NA1U of H-Sugarland C696
UH Coastal Center C6971 N27384116132633383838363931353232312830333638NA1UH Coastal Center C697
UH WG Jones Forest C6981 N2837NV1516323540333738403740NVNANANANANV4041NA1UH WG Jones Forest C698
UH West Liberty C6991 N28NVNANANANANANANANANANANANANANANANANANANANANA1UH West Liberty C699
Lynchburg Ferry C1015/A165 11526251042025342829292028302324201616212925NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 129374417123135404041404138403533NV2827313942NA1Lake Jackson C1016
Baytown Garth C1017132313513142933393634323933363030151817353637NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X183131364513153137444342414136363235333131313842NA1Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N313945161129333939383739384033313226283534NVNA1Oyster Creek C1607
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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San Antonio
San Antonio Northwest C23236373820283238393631373433222724201828214644NA2San Antonio Northwest C23
Camp Bullis C58 13338432430334041NVNANV3533162526202026214745NA1Camp Bullis C58
Calaveras Lake C591334041192731374038353734332729231915NV274442NA1Calaveras Lake C59
Heritage Middle School C6221 N30404018252735383735353132182923181434264442NA1Heritage Middle School C622
CPS Pecan Valley C6781 N30363617212834373529353130162617121226194240NA1CPS Pecan Valley C678
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4232414324243036403837353636373028291520183943NA2Corpus Christi West C4
Corpus Christi Tuloso C211324142242429384139363636363830262911181737NVNA1Corpus Christi Tuloso C21
Victoria C87132424320213035403839373636383126NV1121203841NA1Victoria C87
Ingleside C6851 N3433NANANANANANANANANANANANANANANANANANANANANA1Ingleside C685
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143128323422252338323232333031302924251016233244NA1Mission C43/AP143
Brownsville C80/AGP180124323229242736363537353335342924251118293647NA1Brownsville C80/AGP180
Harlingen Teege C1023127343125272638373536343233333126251220293746NA1Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P244122253115171733312825282524232120101127182832NA1Laredo 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

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.