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Daily Maximum Eight-Hour Ozone Averages for July 2019

The table below lists the peak daily maximum eight-hour ozone concentrations measured in July 2019 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 SitePOCJuly 2019POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 236343532313135324145515350334237NVNANANANANANA2Ft. Worth Northwest C13/AH302
Keller C1723935343032NV3330414846454932474235NANANANANVNA2Keller C17
Frisco C31/C680151434136374343484556504542295249413938404545NA1Frisco C31/C680
Midlothian OFW C52/A137132323227292730293337545449334336323230333147NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X157151454235353238354657494549314146404040404243NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C61132323228292724293337485945294835313230303045NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C679143373732324045423849474644306044NV3434343745NA1Dallas North No.2 C63/C679
Rockwall Heath C69124NV2117172330242327383622144721191922242636NA1Rockwall Heath C69
Grapevine Fairway C70/A301/X182142353430313733353751444543274939333332333540NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071129302924272429273337424034235128292931333248NA1Kaufman C71/A304/X071
Granbury C73/C681132333333302732263940606153353537333535343146NA1Granbury C73/C681
Eagle Mountain Lake C75 14039393534NVNANANV52545252353941363738383747NA1Eagle Mountain Lake C75
Parker County C76135343534292832NV3946535352363438343635353346NA1Parker County C76
Cleburne Airport C77/C682133373834372832274345728360404139373836383341NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 334323328283538343342474844295638313030273344NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402137343631313237363745555648346337343433323753NA1Dallas Executive Airport C402
Greenville C1006/A19813630292826293934NV35434034234432303130322944NA1Greenville C1006/A198
Pilot Point C103215551484142NV43375057494448304353454444445043NA1Pilot Point C1032
Italy C1044/A323136323327283131333142535245353835NVNANV30NVNANA1Italy C1044/A323
Corsicana Airport C1051129322925292731313539404536273831343232343544NA1Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C644223312623212531332251384431243626253025222335NA2Longview C19/A127/C644
Tyler Airport Relocated C82128282422212430272540454234224029262631242437NA1Tyler Airport Relocated C82
Karnack C85/AFHP303127383223273623423134314230232935283028283429NA1Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X151/G1252564438384948565050575258656179605663NVNANANVNA2El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X1591584135354746504650614849555267525460NVNANANVNA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 159463940494955515256475462597557596458586547NA1Chamizal C41/AH126
Socorro Hueco C49/F312154483938545353515260525455536349606858596250NA1Socorro Hueco C49/F312
Skyline Park C72159444040484957525154515560557156607263585953NA1Skyline Park C72
Ivanhoe C414/F514162464140525354545258515357536951626961616350NA1Ivanhoe C414/F514
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Waco
Waco Mazanec C1037139313125292834313644544845414435333532323152NA1Waco Mazanec C1037
Temple Georgia C1045143333225293133333740575254394634313633333340NA1Temple Georgia C1045
Killeen Skylark Field C1047145373530343332355144565453384741384338393436NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 243262219192937292942364541342022212120192624NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A141242262222304644343235323232342923NV2222222728NA2West Orange C9/A141
Port Arthur West C28/A128/A228139NV1918162733212241323329312620191818172123NA1Port Arthur West C28/A128/A228
Hamshire C64/C654138252118213037262940334330413024212120192428NA1Hamshire C64/C654
SETRPC Port Arthur C6281 N402321181731362324NV353430352821202019182427NA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165414126221916242992027443631342821191820182727NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N4017912152627373625282930322115171816201223NA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643143272220NANANANV2747353733382823212121202727NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 139201817152531212240283228322419171817162221NA1Nederland High School C1035
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Austin
Austin Northwest C3/A322239332622272933363646535551395432313534323245NA2Austin Northwest C3/A322
Audubon C38140342824272829343646535347354532303633323143NA1Audubon C38
Dripping Springs School C6141 N41332827283033373644525447364232313735333335NA1Dripping Springs School C614
CAPCOG Lake Georgetown C6901 N45393327323334374749565551375638354138373638NA1CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N42332724272833363740555751384832303635333238NA1Gorzycki Middle School C1603
Lockhart C16041 N35292521252531343335455052404029273131293031NA1Lockhart C1604
St. Edwards University C16051 N3226212022NVNV272933464944343626242928262634NA1St. Edwards University C1605
CAPCOG Bastrop CAMS16121 N18131384433328424538353526242726272728NA1CAPCOG Bastrop CAMS1612
CAPCOG Elgin C16131 N32272421242628293034484945374028262828292930NA1CAPCOG Elgin C1613
CAPCOG San Marcos Staples Road C16751 N40322623272632353535505646394530293333313136NA1CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N37302723252634333437515452395330283330303042NA1CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G316243282518244238293157394333392626252422242623NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 25233302433474238456639NV37402730303230293336NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 345282321256145303156394833412627232323253024NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X154243312922273628303236404735362927283029302626NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239143282519213732232744504936402726222423232625NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45141242318173533222333464434342320201920192421NA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 14429NV212334352933495959424027242827252728NVNA1Houston Bayland Park C53/A146
Conroe Relocated C78/A321156354331475134394842334735333035NV4344432832NA1Conroe Relocated C78/A321
Manvel Croix Park C84136191614162530252742NANV42362419232420222223NA1Manvel Croix Park C84
Clinton C403/C304/AH113 333222317193130222553474937392222212118222420NA3Clinton C403/C304/AH113
Houston North Wayside C405141252218243735263054394332332023232322232524NA1Houston North Wayside C405
Houston Monroe C4061372223182031292325395249403724242321192122NVNA1Houston Monroe C406
Lang C408242302620254035313953454736392924282726272826NA2Lang C408
Houston Croquet C409239232217192829222443545337362321252321242424NA2Houston Croquet C409
Houston Westhollow C410139282621233731252840535236372525262423262723NA1Houston Westhollow C410
Park Place C41614024252024343326294854514040272627NV23242523NA1Park Place C416
Baytown Wetlands Center C5521 N2415109102419131431223222281211131820232722NA1Baytown Wetlands Center C552
Crosby Library C5531 N41262017275437293241344531402627272626273229NA1Crosby Library C553
West Houston C5541 NNANV28302137262924NVNV44243317NV27242325NV19NA1West Houston C554
La Porte Sylvan Beach C5561 N38222217163230212132384231342118191819192422NA1La Porte Sylvan Beach C556
Tom Bass C5581 N41272822243230272741594843402426232524242827NA1Tom Bass C558
Katy Park C5591 N36262518182628242432404335362622232323252625NA1Katy Park C559
Atascocita C5601 N41232015264331293143253323271922212028292825NA1Atascocita C560
Meyer Park C5611 N45272521294131323746384432332627273230312627NA1Meyer Park C561
Huffman Wolf Road C5631 N291918152537262426272128181916201920NVNANANVNA1Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N422622NVNV41NV2729523643323625192525222326NVNA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N40242524285250323456384833392925282627283328NA1Wallisville Road C617
Danciger C618 1 N34232016152525192025485637352019191917182221NA1Danciger C618
Texas City 34th St. C620 1 NNV292823203535232433615846382925252424232729NA1Texas City 34th St. C620
UH Moody Tower C6951 N42272821263638283255535442412829282725252729NA1UH Moody Tower C695
UH WG Jones Forest C6981 N5740NVNANANANANANA42394937353235384143403131NA1UH WG Jones Forest C698
UH West Liberty C6991 N42292322355342374042324527322629273028293027NA1UH West Liberty C699
Lynchburg Ferry C1015/A165 142292220205038242552303827362625222123232523NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 137231917152426171819596038352221191917182021NA1Lake Jackson C1016
Baytown Garth C1017144292523275352343457374733382824272626263229NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X183140272521203232201925665245342922222122202526NA1Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N3926241715262917182055624030242019NV17172121NA1Oyster Creek C1607
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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San Antonio
San Antonio Northwest C23244352830293032373750465448395031293334333244NA2San Antonio Northwest C23
Camp Bullis C58 147383131323535454156465349395935323737363650NA1Camp Bullis C58
Calaveras Lake C591393025252727303233365255514935NV263031292829NA1Calaveras Lake C59
Elm Creek Elementary C5011 N36292326252626292734476352413826252830282728NA1Elm Creek Elementary C501
Fair Oaks Ranch C5021 N43362830303331403751404443335332293434333342NA1Fair Oaks Ranch C502
Bulverde Elementary C5031 N40332625273031393948414742305232283333323143NA1Bulverde Elementary C503
New Braunfels Airport C5041 N35292222242529323232485243344027262928272830NA1New Braunfels Airport C504
City of Garden Ridge C5051 N36292423242630303335465444344427253029272838NA1City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N35272020242428293230444942343726252929282826NA1Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N34242221232426272930465249453225222728262521NA1Heritage Middle School C622
CPS Pecan Valley C6781 N34262020232226302933465448413526232829272631NA1CPS Pecan Valley C678
Government Canyon C16101 N39312428272626312445394347354527262930282739NA1Government Canyon C1610
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4232273022222522182422455157232120191821222123NA2Corpus Christi West C4
Corpus Christi Tuloso C21133253121232721NV2624494957302322211723242327NA1Corpus Christi Tuloso C21
Victoria C87136272018222828242527544944402522192224222426NA1Victoria C87
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143129303021212019253125345255312321232425242324NA1Mission C43/AP143
Harlingen Teege C1023130313323262423253129255152292625NV2728302925NA1Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2019POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P24413728323530262333NVNV385759633931283132353029NA1Laredo 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
  • 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.