Skip to content. | Skip to navigation

Personal tools


Peak Daily One-Hour Ozone Averages for January 2017

The table below lists the peak daily one-hour ozone concentrations measured in January 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 SitePOCJanuary 2017POCMonitoring Site
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23335272026333839394040301382227161826442Ft. Worth Northwest C13/AH302
Keller C1723830252229343640393842281482225151623442Keller C17
Frisco C31/C68013237272128333738403843301582626171823441Frisco C31/C680
Midlothian OFW C52/A13713238282430353643434144421162736161527441Midlothian OFW C52/A137
Denton Airport South C56/A163/X15713836272330353942413942301682324202126461Denton Airport South C56/A163/X157
Arlington Municipal Airport C6112933312127323338393941321052527131522401Arlington Municipal Airport C61
Dallas North No.2 C63/C67912337202228303538403943331262627151322451Dallas North No.2 C63/C679
Rockwall Heath C69126392322283336404034383514727281514NANA1Rockwall Heath C69
Grapevine Fairway C70/A301/X18213535282330333839NANA42301582627172023441Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711344226222735384142414237963031171624431Kaufman C71/A304/X071
Granbury C73/C68112838372627354042434344321381634182339451Granbury C73/C681
Eagle Mountain Lake C75 132322921252933333534392717112127212235471Eagle Mountain Lake C75
Parker County C7613634312527333839393739281581223202539441Parker County C76
Cleburne Airport C77/C682134443730334046484948514216112440172435481Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 32437242328333440393742331272327161121413Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021NANANA7253030373634372775222814921381Dallas Executive Airport C402
Greenville C1006/A19811340182028343641414041371553032161525431Greenville C1006/A198
Pilot Point C103213436242429343738393742281792222202223431Pilot Point C1032
Italy C1044/A3231383829212732354242394036732939161225421Italy C1044/A323
Corsicana Airport C105113739282024343742414343371062939181522431Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Longview C19/A127/C644210413415193136413737423930312632271323402Longview C19/A127/C644
Tyler Airport Relocated C82120432920243439413837413734102837221224421Tyler Airport Relocated C82
Karnack C85/AFHP303110403417193438403538443730342632251219401Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X151241454041373739402733313323344437253737402El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159140433739343539402930273125334334283535371Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 141474142373338412435362517304637273939421Chamizal C41/AH126
Socorro Hueco C49/F312136433536343337383631283228314234263637361Socorro Hueco C49/F312
Skyline Park C72139474443403439442940333326344638284143421Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N41464340333336363736343936355040323543443BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414138454042373537413535313323294034263637391Ivanhoe C414
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Waco Mazanec C103714236302023333641433941351342838191622441Waco Mazanec C1037
Temple Georgia C104514738392426374347484846403362838251625481Temple Georgia C1045
Killeen Skylark Field C104714338372326354244474547393162938181733471Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23038451292336403740383836363534313032352Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122434451192835383637363535343330322924382West Orange C9/A141
Port Arthur West C28/A128/A228129414914132938423942394039383535343128361Port Arthur West C28/A128/A228
Hamshire C64/C654137394713122437424042383937383433333029371Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C1654122323812112430322932252527262322201917221SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C643128394613112837403841383836353534343128351SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 127384613122937413942394038373636352930351Nederland High School C1035
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Austin Northwest C3/A32224337412129354045434342373442730301535372Austin Northwest C3/A322
Audubon C3814436382329354145434342373052428271530431Audubon C38
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Houston East C1/G316234394115142833413737383935373432252422402Houston East C1/G316
Houston Aldine C8/AF108/X150 233394313122834393536353836373230221721432Houston Aldine C8/AF108/X150
Channelview C15/AH115 338414416143038403436372934352829242520443Channelview C15/AH115
Northwest Harris Co. C26/A110/X154235364017143237423737373941433329221122372Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239133364315102634393737373831352929262425351Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45130475122172637463943404138393242NANANANA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 13336441292934383637353836383331221920411Houston Bayland Park C53/A146
Conroe Relocated C78/A321134414318143338454240414544433635271522401Conroe Relocated C78/A321
Manvel Croix Park C84136435116163037423940404138423634282628401Manvel Croix Park C84
Clinton C403/C304/AH113 334363316162735403434343435383027252518373Clinton C403/C304/AH113
Houston North Wayside C40513335361512283339363232NA29363227191416371Houston North Wayside C405
Houston Monroe C406129364214112532363336353533343026212222301Houston Monroe C406
Lang C4082323640139293237343535363336312722717402Lang C408
Houston Croquet C409233384713132934393837373937393331232221382Houston Croquet C409
Houston Westhollow C41013336431310273637373535363640322820818401Houston Westhollow C410
Park Place C4161323741121225334035NA323735363228242620371Park Place C416
Sheldon C5511 N30343624222933343332323230312929232224341Sheldon C551
Baytown Wetlands Center C5521 N20242815112430343026242321242221151814231Baytown Wetlands Center C552
West Houston C5541 N3237421611293740383737383842332919NANANA1West Houston C554
La Porte Sylvan Beach C5561 N22364413NANANANANANA161618191717131NANA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N32333527243135373636353635373432292527381Mercer Arboretum C557
Tom Bass C5581 N29354214142731373435343432343028242323341Tom Bass C558
Katy Park C5591 N283338166243135323130303135282419914301Katy Park C559
Atascocita C5601 N27333614132832383733343633363029171417351Atascocita C560
Meyer Park C5611 N2629321310272934282829313033263515813281Meyer Park C561
Bunker Hill Village C5621 N28344115102935363424NA2445NANANA3264581821Bunker Hill Village C562
Huffman Wolf Road C5631 N38494721173641464845464945433637242025501Huffman Wolf Road C563
Clear Brook High School C5701 N3243461812263440393737383234323131NANA351Clear Brook High School C570
Clear Creek High School C5711 N3043471410213234343534362932262927NANA311Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N36414216142636383437373930343331242622441HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N47465019152841454441404838423838263025531Wallisville Road C617
Danciger C618 1 N32405114142836433732343837413431312626121Danciger C618
Texas City 34th St. C620 1 N33445120172940444240404237413537353133411Texas City 34th St. C620
UH Moody Tower C6951 N35404613132835433736383835363230252521411UH Moody Tower C695
U of H-Sugarland C6961 N32394615122838414040403939443632261420411U of H-Sugarland C696
UH Coastal Center C6971 N32454620122435414139374133373334342933381UH Coastal Center C697
UH WG Jones Forest C6981 N353930161433374438404045434427NANANANA341UH WG Jones Forest C698
Lynchburg Ferry C1015/A165 13334311572129363130303031342726212120341Lynchburg Ferry C1015/A165
Lake Jackson C1016 135415121172737444242414240433835343131371Lake Jackson C1016
Baytown Garth C1017143364316132835434136354435403334192221491Baytown Garth C1017
Galveston 99th St. C1034/A320/X183134385015162739454544434539393538353437401Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 NNA445218182236434240394242443535332933391Oyster Creek C1607
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
San Antonio
San Antonio Northwest C23242404123353441424036423636272927232234312San Antonio Northwest C23
Camp Bullis C58 1424348273636434533NA423736242930252535291Camp Bullis C58
Calaveras Lake C59140464521313540444041413636343127221942401Calaveras Lake C59
Heritage Middle School C6221 N38444521283138423939383435233127221843361Heritage Middle School C622
CPS Pecan Valley C6781 N40414220252938423934383331232819211738301CPS Pecan Valley C678
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C4236464830283039434039383738393129312424222Corpus Christi West C4
Corpus Christi Tuloso C21136464827282941444138383739403127312127191Corpus Christi Tuloso C21
Victoria C87139484723243138434041403839403429271127251Victoria C87
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP143132364223362340363534343233333129262118311Mission C43/AP143
Brownsville C80/AGP180127364031312039413738373537373226281923361Brownsville C80/AGP180
Harlingen Teege C1023129383929342441403739363436363329282024341Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P244128313827261936343229312826252427151834321Laredo 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 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.