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Peak Daily One-Hour Ozone Averages for January 2019

The table below lists the peak daily one-hour ozone concentrations measured in January 2019 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 2019POCMonitoring Site
12345678910111213141516171819202122
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2161418375041393534242825262113272040293040362Ft. Worth Northwest C13/AH302
Keller C172181618385244403841262726262314272143303342352Keller C17
Frisco C31/C6801171617384448424141302928282614262343433544321Frisco C31/C680
Midlothian OFW C52/A1371181419374244454037283531272520292624313644371Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571171618393745423839232725262513282240303542351Denton Airport South C56/A163/X157
Arlington Municipal Airport C611161516354445443736273231272519272536323343361Arlington Municipal Airport C61
Dallas North No.2 C63/C6791191617334446433939252826272414252340383444331Dallas North No.2 C63/C679
Rockwall Heath C691161416334241414343303128282920232218323940301Rockwall Heath C69
Grapevine Fairway C70/A301/X1821171619374545413940212530262612272744323341341Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711171417314042384142303731292922302923304342351Kaufman C71/A304/X071
Granbury C73/C6811171621424441464130302928302822312538333946381Granbury C73/C681
Eagle Mountain Lake C75 1181720425046444141293227282619322143323845381Eagle Mountain Lake C75
Parker County C761201822414942454239342828313020312343354046371Parker County C76
Cleburne Airport C77/C6821171622434348484036333331312619292933343944371Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3171719333745414141212527292613232335383343333Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402117NA19354744454241273435292518272831323745381Dallas Executive Airport C402
Greenville C1006/A1981181315344844434239292726282821262622294239331Greenville C1006/A198
Pilot Point C10321191718444049414041282827272712252446343844341Pilot Point C1032
Italy C1044/A3231191621434340374442323532302623NA2521323945351Italy C1044/A323
Corsicana Airport C10511161320384242333940303528302822292624294445411Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C644230201835474234434131NANANA2325293523304640392Longview C19/A127/C644
Tyler Airport Relocated C821262018395345354543323635323128322925344242401Tyler Airport Relocated C82
Karnack C85/AFHP3031251824284343324241382425282728253321273740361Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
El Paso-Juarez
El Paso UTEP C12/A125/X151/G1252342439413433403436293941443941324145464336442El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X159132NA23353225333034273639393439313846414536431Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1332539392834422634324139424038334150474337451Chamizal C41/AH126
Socorro Hueco C49/F3121302637394228413336343741413443334344465135421Socorro Hueco C49/F312
Skyline Park C721353345333540433339374443423940404146454141471Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N421937394043424336332743363123263641434345463BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414/F5141292237344534373133364041393442363843444835451Ivanhoe C414/F514
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Waco
Waco Mazanec C10371181222374137373840333629312322262722373843361Waco Mazanec C1037
Temple Georgia C10451221325364142353637373827302523243621313842371Temple Georgia C1045
Killeen Skylark Field C10471231426464644393841423829342223283828404247381Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2312225345147385136374944333020363930293641NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412302832325546434738394842333024393630343742422West Orange C9/A141
Port Arthur West C28/A128/A2281302531344745404037434542342923413330283541421Port Arthur West C28/A128/A228
Hamshire C64/C6541312931364747424838445343323227383633283640411Hamshire C64/C654
SETRPC Port Arthur C6281 N312533344851424148424642353124383532273741441SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541322236365148444140434542343226413531283740431SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N302431355350424836424840332928403931333642441SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431322934375250444538454946373224403731333844451SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1282327324845404336384741342919363629283440411Nederland High School C1035
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Austin
Austin Northwest C3/A3222191128414241343937353230302622153718293844372Austin Northwest C3/A322
Audubon C381191128404541324138363331332523173619293846361Audubon C38
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Houston-Galveston-Brazoria
Houston East C1/G3162282728305641303828324836282514252924253841412Houston East C1/G316
Houston Aldine C8/AF108/X150 2332929365846384637385338343321273727313941422Houston Aldine C8/AF108/X150
Channelview C15/AH115 3312830334638374034334838332919293225293833383Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542NA2421375546363438374932333320253226323942412Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391342932315443394235405140312723353229293640401Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451322631304537363734425139292922323028273439391Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1282023314934283532364031312619273019253532341Houston Bayland Park C53/A146
Conroe Relocated C78/A3211352928385552374138435439343327323526324044431Conroe Relocated C78/A321
Manvel Croix Park C841372019355842373935404940342822333228303640421Manvel Croix Park C84
Clinton C403/C304/AH113 3312326295140312836364637322418282824283733363Clinton C403/C304/AH113
Houston North Wayside C40512722252744362728313043NANANANA232619263434331Houston North Wayside C405
Houston Monroe C4061272427274334323527324133272018262822262932341Houston Monroe C406
Lang C4082292425304940323730334336302719253124283638372Lang C408
Houston Croquet C4092302428345042343833374737322719303225273538392Houston Croquet C409
Houston Westhollow C4101332524345240343836405039333120303426293841391Houston Westhollow C410
Park Place C41612718272952393435313746373024142928NANANANANA1Park Place C416
Baytown Wetlands Center C5521 N272124263529232531344427272717282214233134311Baytown Wetlands Center C552
Crosby Library C5531 N262324314536314031354532272923263218263335331Crosby Library C553
Katy Park C5591 N251515253731242428323925222213172417212827301Katy Park C559
Atascocita C5601 N232324244034253127303928232319242317243029321Atascocita C560
Meyer Park C5611 N201612203127212022233018192110141814192425251Meyer Park C561
Huffman Wolf Road C5631 N16151618252320231922281916171415NA14172124241Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N312330325337374334345135332916283628403535371HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N363237384645374539365344343429363328344043391Wallisville Road C617
Danciger C618 1 N452932365341393947485040383024333428323942421Danciger C618
Texas City 34th St. C620 1 N343337344946404540475541373530373529314043401Texas City 34th St. C620
UH Moody Tower C6951 N352229365745393437435240343017323629313843431UH Moody Tower C695
UH WG Jones Forest C6981 N332726375548353838395434323419283426323942421UH WG Jones Forest C698
UH West Liberty C6991 N302730355346404635425136303026363323293641401UH West Liberty C699
Lynchburg Ferry C1015/A165 1302430293137383632374937283021292826293435291Lynchburg Ferry C1015/A165
Lake Jackson C1016 1373133375139383744464943362727343329323941431Lake Jackson C1016
Baytown Garth C10171333033364545344238405443323227373226303943411Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831333134344845403538435343343531373633303742431Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N423539476553463843495343373432383732344044441Oyster Creek C1607
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
San Antonio
San Antonio Northwest C232211632415245433437453434311915202816343748352San Antonio Northwest C23
Camp Bullis C58 1212134455046433638433434322115212820353748371Camp Bullis C58
Calaveras Lake C59122133445554338304049353834233519299354052411Calaveras Lake C59
Heritage Middle School C6221 N1472738473630243241293125152713206273244341Heritage Middle School C622
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Corpus Christi-Victoria
Corpus Christi West C42291130465039373646524440372331332727344144452Corpus Christi West C4
Corpus Christi Tuloso C21122122843443532NA42454136332124292522313740401Corpus Christi Tuloso C21
Victoria C871231727394839353738464436322424312427303743431Victoria C87
Violet C6641 N251433454739353646494441212327312626344244431Violet C664
Ingleside C6851 N301431475240363747504642372532362829364244431Ingleside C685
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Lower Rio Grande Valley
Mission C43/AP1431301333414037353138413440353215202229334037381Mission C43/AP143
Harlingen Teege C102313723334553423935424445393731NANA2632344242451Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441211337454539333331454139383021252123404046421Laredo 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
  • 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.