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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
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2333527202633383939404030138222716182644442Ft. Worth Northwest C13/AH302
Keller C172383025222934364039384228148222515162344412Keller C17
Frisco C31/C6801323727212833373840384330158262617182344341Frisco C31/C680
Midlothian OFW C52/A1371323828243035364343414442116273616152744461Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571383627233035394241394230168232420212646411Denton Airport South C56/A163/X157
Arlington Municipal Airport C611293331212732333839394132105252713152240421Arlington Municipal Airport C61
Dallas North No.2 C63/C6791233720222830353840394333126262715132245361Dallas North No.2 C63/C679
Rockwall Heath C69126392322283336404034383514727281514NANANA1Rockwall Heath C69
Grapevine Fairway C70/A301/X18213535282330333839NANA4230158262717202344371Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071134422622273538414241423796303117162443381Kaufman C71/A304/X071
Granbury C73/C6811283837262735404243434432138163418233945461Granbury C73/C681
Eagle Mountain Lake C75 13232292125293333353439271711212721223547431Eagle Mountain Lake C75
Parker County C761363431252733383939373928158122320253944421Parker County C76
Cleburne Airport C77/C68213444373033404648494851421611244017243548491Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3243724232833344039374233127232716112141413Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021NANANA725303037363437277522281492139431Dallas Executive Airport C402
Greenville C1006/A1981134018202834364141404137155303216152543431Greenville C1006/A198
Pilot Point C10321343624242934373839374228179222220222343311Pilot Point C1032
Italy C1044/A323138382921273235424239403673293916122542441Italy C1044/A323
Corsicana Airport C10511373928202434374241434337106293918152243411Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64421041341519313641373742393031263227132340412Longview C19/A127/C644
Tyler Airport Relocated C8212043292024343941383741373410283722122442411Tyler Airport Relocated C82
Karnack C85/AFHP30311040341719343840353844373034263225121940321Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124145404137373940273331332334443725373740482El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15914043373934353940293027312533433428353537451Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14147414237333841243536251730463727393942491Chamizal C41/AH126
Socorro Hueco C49/F31213643353634333738363128322831423426363736441Socorro Hueco C49/F312
Skyline Park C7213947444340343944294033332634463828414342491Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N4146434033333636373634393635504032354344493BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41413845404237353741353531332329403426363739471Ivanhoe C414
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Waco
Waco Mazanec C10371423630202333364143394135134283819162244401Waco Mazanec C1037
Temple Georgia C10451473839242637434748484640336283825162548471Temple Georgia C1045
Killeen Skylark Field C10471433837232635424447454739316293818173347461Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2303845129233640374038383636353431303235372Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412243445119283538363736353534333032292438362West Orange C9/A141
Port Arthur West C28/A128/A22812941491413293842394239403938353534312836371Port Arthur West C28/A128/A228
Hamshire C64/C65413739471312243742404238393738343333302937391Hamshire C64/C654
SETRPC 40 Sabine Pass C640/C165412232381211243032293225252726232220191722211SETRPC 40 Sabine Pass C640/C1654
SETRPC 43 Jefferson Co Airport C64312839461311283740384138383635353434312835371SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 12738461312293741394239403837363635293035371Nederland High School C1035
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Austin
Austin Northwest C3/A3222433741212935404543434237344273030153537452Austin Northwest C3/A322
Audubon C381443638232935414543434237305242827153043451Audubon C38
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G31623439411514283341373738393537343225242240432Houston East C1/G316
Houston Aldine C8/AF108/X150 23339431312283439353635383637323022172143442Houston Aldine C8/AF108/X150
Channelview C15/AH115 33841441614303840343637293435282924252044443Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423536401714323742373737394143332922112237392Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23913336431510263439373737383135292926242535401Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45130475122172637463943404138393242NANANANANA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1333644129293438363735383638333122192041411Houston Bayland Park C53/A146
Conroe Relocated C78/A32113441431814333845424041454443363527152240431Conroe Relocated C78/A321
Manvel Croix Park C8413643511616303742394040413842363428262840431Manvel Croix Park C84
Clinton C403/C304/AH113 33436331616273540343434343538302725251837383Clinton C403/C304/AH113
Houston North Wayside C40513335361512283339363232NA2936322719141637371Houston North Wayside C405
Houston Monroe C40612936421411253236333635353334302621222230341Houston Monroe C406
Lang C408232364013929323734353536333631272271740382Lang C408
Houston Croquet C40923338471313293439383737393739333123222138422Houston Croquet C409
Houston Westhollow C4101333643131027363737353536364032282081840391Houston Westhollow C410
Park Place C4161323741121225334035NA32373536322824262037391Park Place C416
Sheldon C5511 N3034362422293334333232323031292923222434351Sheldon C551
Baytown Wetlands Center C5521 N2024281511243034302624232124222115181423271Baytown Wetlands Center C552
West Houston C5541 N3237421611293740383737383842332919NANANANA1West Houston C554
La Porte Sylvan Beach C5561 N22364413NANANANANANA161618191717131NANANA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N3233352724313537363635363537343229252738381Mercer Arboretum C557
Tom Bass C5581 N2935421414273137343534343234302824232334351Tom Bass C558
Katy Park C5591 N28333816624313532313030313528241991430331Katy Park C559
Atascocita C5601 N2733361413283238373334363336302917141735371Atascocita C560
Meyer Park C5611 N262932131027293428282931303326351581328311Meyer Park C561
Bunker Hill Village C5621 N28344115102935363424NA2445NANANA326458182NA1Bunker Hill Village C562
Huffman Wolf Road C5631 N3849472117364146484546494543363724202550511Huffman Wolf Road C563
Clear Brook High School C5701 N3243461812263440393737383234323131NANA35401Clear Brook High School C570
Clear Creek High School C5711 N3043471410213234343534362932262927NANA31401Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N3641421614263638343737393034333124262244451HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N4746501915284145444140483842383826302553471Wallisville Road C617
Danciger C618 1 N3240511414283643373234383741343131262612NA1Danciger C618
Texas City 34th St. C620 1 N3344512017294044424040423741353735313341421Texas City 34th St. C620
UH Moody Tower C6951 N3540461313283543373638383536323025252141431UH Moody Tower C695
U of H-Sugarland C6961 N3239461512283841404040393944363226142041431U of H-Sugarland C696
UH Coastal Center C6971 N3245462012243541413937413337333434293338391UH Coastal Center C697
UH WG Jones Forest C6981 N353930161433374438404045434427NANANANA34421UH WG Jones Forest C698
UH West Liberty C6991 N3633NANANANANANANANANANANANANANANANANANANA1UH West Liberty C699
Lynchburg Ferry C1015/A165 1333431157212936313030303134272621212034351Lynchburg Ferry C1015/A165
Lake Jackson C1016 13541512117273744424241424043383534313137421Lake Jackson C1016
Baytown Garth C101714336431613283543413635443540333419222149441Baytown Garth C1017
Galveston 99th St. C1034/A320/X18313438501516273945454443453939353835343740401Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 NNA44521818223643424039424244353533293339401Oyster Creek C1607
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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San Antonio
San Antonio Northwest C2324240412335344142403642363627292723223431482San Antonio Northwest C23
Camp Bullis C58 1424348273636434533NA42373624293025253529491Camp Bullis C58
Calaveras Lake C5914046452131354044404141363634312722194240451Calaveras Lake C59
Heritage Middle School C6221 N3844452128313842393938343523312722184336461Heritage Middle School C622
CPS Pecan Valley C6781 N4041422025293842393438333123281921173830431CPS Pecan Valley C678
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C423646483028303943403938373839312931242422462Corpus Christi West C4
Corpus Christi Tuloso C2113646482728294144413838373940312731212719441Corpus Christi Tuloso C21
Victoria C8713948472324313843404140383940342927112725431Victoria C87
Ingleside C6851 N3638NANANANANANANANANANANANANANANANANANANA1Ingleside C685
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14313236422336234036353434323333312926211831371Mission C43/AP143
Brownsville C80/AGP18012736403131203941373837353737322628192336411Brownsville C80/AGP180
Harlingen Teege C102312938392934244140373936343636332928202434451Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2017POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24412831382726193634322931282625242715183432321Laredo 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.