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Peak Daily One-Hour Ozone Averages for July 2018

The table below lists the peak daily one-hour ozone concentrations measured in July 2018 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 SitePOCJuly 2018POCMonitoring Site
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 23743556170626360734349504442425042492Ft. Worth Northwest C13/AH302
Keller C1724052555865545755734256574745435548572Keller C17
Frisco C31/C68014863704847445654546580666054495973861Frisco C31/C680
Midlothian OFW C52/A13713136404852NANANA443337443534343733461Midlothian OFW C52/A137
Denton Airport South C56/A163/X15714358685047445049575267585251516553661Denton Airport South C56/A163/X157
Arlington Municipal Airport C6113642475859486158534042473936373941461Arlington Municipal Airport C61
Dallas North No.2 C63/C67914450584848425654626561684545445463781Dallas North No.2 C63/C679
Rockwall Heath C6913136433741355449445146503431313563621Rockwall Heath C69
Grapevine Fairway C70/A301/X18214149645756485554705069755047455753681Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07114050424650405952464443484536363938501Kaufman C71/A304/X071
Granbury C73/C68113843416754636866504042494037383735441Granbury C73/C681
Eagle Mountain Lake C75 14447666165505957854455564948515845521Eagle Mountain Lake C75
Parker County C761NANANANANANANANA483948545143414441451Parker County C76
Cleburne Airport C77/C68213745436159536966533649504642413936481Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 33943505453475856596349584239374656633Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40213541465355455955534546513936374342471Dallas Executive Airport C402
Greenville C1006/A19813136434243425550485453514335363968701Greenville C1006/A198
Pilot Point C103214567784344435253505559546055526761711Pilot Point C1032
Italy C1044/A3231303342474337514838NANA413133324137471Italy C1044/A323
Corsicana Airport C10511364944505143565144NANA494738374139541Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Longview C19/A127/C64422335573749476048513136424136313741472Longview C19/A127/C644
Tyler Airport Relocated C8213238464446395847443741464138344438481Tyler Airport Relocated C82
Karnack C85/AFHP30314557413638274339443445405253564264581Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X15125753577454546063576262695975607765542El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15915552556853525461535049675567576958551Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 15955557248495561525556645872607660561Chamizal C41/AH126
Socorro Hueco C49/F31215550586449494556474143545547595448611Socorro Hueco C49/F312
Skyline Park C7215656596556575862605464736474627167601Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N515241NANANANANANANANANANANANANA40463BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41415657556652515159544950706363636361601Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Waco Mazanec C103713133495042414850383742423235334741461Waco Mazanec C1037
Temple Georgia C104513438524046494853333941383738354846531Temple Georgia C1045
Killeen Skylark Field C104714048603847515356345348495145414557721Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 21629612232405136355647372624223754612Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122846633741555335356354564748374876652West Orange C9/A141
Port Arthur West C28/A128/A22811821363358644436385234352625272954341Port Arthur West C28/A128/A228
Hamshire C64/C65412127733158575338273240313128264175491Hamshire C64/C654
SETRPC Port Arthur C6281 N18203932756243394015235393228272853321SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165411916363259484036242630352526262436321SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N3253434031415843336041514550355063631SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64312224463548575539425840402828292970451SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1151837182849513334493636222323NA65451Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Austin Northwest C3/A32223235503641534647253840383534333851642Austin Northwest C3/A322
Audubon C3813036543340554347213842423735323847581Audubon C38
Fayette County C6012 N2926321946434837233030282728242830332Fayette County C601
Dripping Springs School C6141 N3136433441514748283639443634334245461Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N2731313137473847263234323031263031381CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N3646663640534648264747474339354253621CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N3336483845575053283740413435313445451Gorzycki Middle School C1603
Lockhart C16041 N2931343237474040273433332929252934391Lockhart C1604
St. Edwards University C16051 N2729343838544346233334333030263138491St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N3636425047704643293537383637303639411CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N2729404138444247243234333230293536531CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Houston East C1/G31623046552351485526274162404436234348522Houston East C1/G316
Houston Aldine C8/AF108/X150 23969522360475440339170566247345555622Houston Aldine C8/AF108/X150
Channelview C15/AH115 33348581951444536357979566042345663663Channelview C15/AH115
Northwest Harris Co. C26/A110/X15423942382155444839195937393934263833402Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23912536472550574636374446383432233540441Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4512329412345584235343915NANANANA3334341Seabrook Friendship Park C45
Houston Bayland Park C53/A146 12228362650635835293237283226243236381Houston Bayland Park C53/A146
Conroe Relocated C78/A32115576443235364150317749626551314337461Conroe Relocated C78/A321
Manvel Croix Park C8412023362751715336292930282626202629281Manvel Croix Park C84
Clinton C403/C304/AH113 323323826455449333244412835292329NA423Clinton C403/C304/AH113
Houston North Wayside C40512843451746425030256754374131254145491Houston North Wayside C405
Houston Monroe C40612029372641554435272837272725202834381Houston Monroe C406
Lang C40823245393258496242285643414738263639442Lang C408
Houston Croquet C40921924322044795933273336272724233132362Houston Croquet C409
Houston Westhollow C41013544362956596438323836312926212732341Houston Westhollow C410
Park Place C41612333443046745433354442313128233141461Park Place C416
Baytown Wetlands Center C5521 N1216231127272016171429202218121824231Baytown Wetlands Center C552
Crosby Library C5531 N4972621933435138295583796356417071741Crosby Library C553
La Porte Sylvan Beach C5561 NNA161819NANANANANANANANANANANANANANA1La Porte Sylvan Beach C556
Tom Bass C5581 N1523281825533723182124252321191923271Tom Bass C558
Katy Park C5591 N1320282146444024163024232619172221241Katy Park C559
Atascocita C5601 N3969421233263523166880615744275552651Atascocita C560
Meyer Park C5611 N2537241337262823143423272525142221261Meyer Park C561
Bunker Hill Village C5621 N2433312241444627223334283127182532331Bunker Hill Village C562
Clear Creek High School C5711 NNANANANANANANANANANANANANANANANANANA1Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N2742512146504730355260364735264147541HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N3654662158504737394399686644306381731Wallisville Road C617
Danciger C618 1 N1617251535574526172020191715151619191Danciger C618
Texas City 34th St. C620 1 N1719432840545035273336293031242925251Texas City 34th St. C620
UH Moody Tower C6951 N2536463454625737364851383630284247501UH Moody Tower C695
UH WG Jones Forest C6981 N5575433242444345288346556651284237481UH WG Jones Forest C698
UH West Liberty C6991 N4266522133334238295067736251386457571UH West Liberty C699
Lynchburg Ferry C1015/A165 1293754NANANANANA294568646435234463641Lynchburg Ferry C1015/A165
Lake Jackson C1016 11817392434564134282722202319202119211Lake Jackson C1016
Baytown Garth C101713655662159494838414291666645326882791Baytown Garth C1017
Galveston 99th St. C1034/A320/X18311919394127494736282526252220192025211Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N1718403230504034232323233423212120221Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
San Antonio
San Antonio Northwest C2323235434642555652293643423834313343422San Antonio Northwest C23
Camp Bullis C58 13340505037505054374149464039343756551Camp Bullis C58
Calaveras Lake C5913333343541595447232932333131273031421Calaveras Lake C59
Elm Creek Elementary C5011 N3031373945535850353036373232293039381Elm Creek Elementary C501
Fair Oaks Ranch C5021 N3444544540544452394349504341363861561Fair Oaks Ranch C502
Bulverde Elementary C5031 N3438544740504146324247464340353852591Bulverde Elementary C503
New Braunfels Airport C5041 N2729363737584240233634343030252935391New Braunfels Airport C504
City of Garden Ridge C5051 N2932424840514645283031322830253039541City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N2729353637504442233434333030263035401Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N3031323439575044212731302829252830391Heritage Middle School C622
CPS Pecan Valley C6781 N2829343639554742233136333029252738441CPS Pecan Valley C678
Government Canyon C16101 N3136434142524753352940383532262941371Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C422122203129454935182121212122212119212Corpus Christi West C4
Corpus Christi Tuloso C2111919183529344431172120182020192017201Corpus Christi Tuloso C21
Victoria C871NA18242840504336222129272726222628341Victoria C87
Ingleside C6851 N2319173829404231172019181819202016201Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP14312223233027223826222628212023202123271Mission C43/AP143
Harlingen Teege C102312324222620244122252430262424212222211Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P24412729313122544840272732303133272935411Laredo 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.