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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 2374355617062636073434950444242502Ft. Worth Northwest C13/AH302
Keller C172405255586554575573425657474543552Keller C17
Frisco C31/C6801486370484744565454658066605449591Frisco C31/C680
Midlothian OFW C52/A13713136404852NANANA44333744353434371Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571435868504744504957526758525151651Denton Airport South C56/A163/X157
Arlington Municipal Airport C611364247585948615853404247393637391Arlington Municipal Airport C61
Dallas North No.2 C63/C6791445058484842565462656168454544541Dallas North No.2 C63/C679
Rockwall Heath C691313643374135544944514650343131351Rockwall Heath C69
Grapevine Fairway C70/A301/X1821414964575648555470506975504745571Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711405042465040595246444348453636391Kaufman C71/A304/X071
Granbury C73/C6811384341675463686650404249403738371Granbury C73/C681
Eagle Mountain Lake C75 1444766616550595785445556494851581Eagle Mountain Lake C75
Parker County C761NANANANANANANANA48394854514341441Parker County C76
Cleburne Airport C77/C6821374543615953696653364950464241391Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3394350545347585659634958423937463Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021354146535545595553454651393637431Dallas Executive Airport C402
Greenville C1006/A1981313643424342555048545351433536391Greenville C1006/A198
Pilot Point C10321456778434443525350555954605552671Pilot Point C1032
Italy C1044/A3231303342474337514838NANA41313332411Italy C1044/A323
Corsicana Airport C10511364944505143565144NANA49473837411Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Longview C19/A127/C6442233557374947604851313642413631372Longview C19/A127/C644
Tyler Airport Relocated C821323846444639584744374146413834441Tyler Airport Relocated C82
Karnack C85/AFHP3031455741363827433944344540525356421Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X1512575357745454606357626269597560772El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591555255685352546153504967556757691Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1595555724849556152555664587260761Chamizal C41/AH126
Socorro Hueco C49/F3121555058644949455647414354554759541Socorro Hueco C49/F312
Skyline Park C721565659655657586260546473647462711Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N515241NANANANANANANANANANANANANA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141565755665251515954495070636363631Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Waco Mazanec C10371313349504241485038374242323533471Waco Mazanec C1037
Temple Georgia C10451343852404649485333394138373835481Temple Georgia C1045
Killeen Skylark Field C10471404860384751535634534849514541451Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2162961223240513635564737262422372Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412284663374155533535635456474837482West Orange C9/A141
Port Arthur West C28/A128/A2281182136335864443638523435262527291Port Arthur West C28/A128/A228
Hamshire C64/C6541212773315857533827324031312826411Hamshire C64/C654
SETRPC Port Arthur C6281 N1820393275624339401523539322827281SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541191636325948403624263035252626241SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N325343403141584333604151455035501SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431222446354857553942584040282829291SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1151837182849513334493636222323NA1Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Austin Northwest C3/A3222323550364153464725384038353433382Austin Northwest C3/A322
Audubon C381303654334055434721384242373532381Audubon C38
Fayette County C6012 N292632194643483723303028272824282Fayette County C601
Dripping Springs School C6141 N313643344151474828363944363433421Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N273131313747384726323432303126301CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N364666364053464826474747433935421CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N333648384557505328374041343531341Gorzycki Middle School C1603
Lockhart C16041 N293134323747404027343333292925291Lockhart C1604
St. Edwards University C16051 N272934383854434623333433303026311St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N363642504770464329353738363730361CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N272940413844424724323433323029351CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Houston East C1/G3162304655235148552627416240443623432Houston East C1/G316
Houston Aldine C8/AF108/X150 2396952236047544033917056624734552Houston Aldine C8/AF108/X150
Channelview C15/AH115 3334858195144453635797956604234563Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542394238215544483919593739393426382Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391253647255057463637444638343223351Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4512329412345584235343915NANANANA331Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1222836265063583529323728322624321Houston Bayland Park C53/A146
Conroe Relocated C78/A3211557644323536415031774962655131431Conroe Relocated C78/A321
Manvel Croix Park C841202336275171533629293028262620261Manvel Croix Park C84
Clinton C403/C304/AH113 3233238264554493332444128352923293Clinton C403/C304/AH113
Houston North Wayside C4051284345174642503025675437413125411Houston North Wayside C405
Houston Monroe C4061202937264155443527283727272520281Houston Monroe C406
Lang C4082324539325849624228564341473826362Lang C408
Houston Croquet C4092192432204479593327333627272423312Houston Croquet C409
Houston Westhollow C4101354436295659643832383631292621271Houston Westhollow C410
Park Place C4161233344304674543335444231312823311Park Place C416
Baytown Wetlands Center C5521 N121623112727201617142920221812181Baytown Wetlands Center C552
Crosby Library C5531 N497262193343513829558379635641701Crosby Library C553
La Porte Sylvan Beach C5561 NNA161819NANANANANANANANANANANANA1La Porte Sylvan Beach C556
Tom Bass C5581 N152328182553372318212425232119191Tom Bass C558
Katy Park C5591 N132028214644402416302423261917221Katy Park C559
Atascocita C5601 N396942123326352316688061574427551Atascocita C560
Meyer Park C5611 N253724133726282314342327252514221Meyer Park C561
Bunker Hill Village C5621 N243331224144462722333428312718251Bunker Hill Village C562
Clear Creek High School C5711 NNANANANANANANANANANANANANANANANA1Clear Creek High School C571
HRM-3 Haden Road C603/A114 1 N274251214650473035526036473526411HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N365466215850473739439968664430631Wallisville Road C617
Danciger C618 1 N161725153557452617202019171515161Danciger C618
Texas City 34th St. C620 1 N171943284054503527333629303124291Texas City 34th St. C620
UH Moody Tower C6951 N253646345462573736485138363028421UH Moody Tower C695
UH WG Jones Forest C6981 N557543324244434528834655665128421UH WG Jones Forest C698
UH West Liberty C6991 N426652213333423829506773625138641UH West Liberty C699
Lynchburg Ferry C1015/A165 1293754NANANANANA29456864643523441Lynchburg Ferry C1015/A165
Lake Jackson C1016 1181739243456413428272220231920211Lake Jackson C1016
Baytown Garth C10171365566215949483841429166664532681Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831191939412749473628252625222019201Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N171840323050403423232323342321211Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
San Antonio
San Antonio Northwest C232323543464255565229364342383431332San Antonio Northwest C23
Camp Bullis C58 1334050503750505437414946403934371Camp Bullis C58
Calaveras Lake C591333334354159544723293233313127301Calaveras Lake C59
Elm Creek Elementary C5011 N303137394553585035303637323229301Elm Creek Elementary C501
Fair Oaks Ranch C5021 N344454454054445239434950434136381Fair Oaks Ranch C502
Bulverde Elementary C5031 N343854474050414632424746434035381Bulverde Elementary C503
New Braunfels Airport C5041 N272936373758424023363434303025291New Braunfels Airport C504
City of Garden Ridge C5051 N293242484051464528303132283025301City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N272935363750444223343433303026301Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N303132343957504421273130282925281Heritage Middle School C622
CPS Pecan Valley C6781 N282934363955474223313633302925271CPS Pecan Valley C678
Government Canyon C16101 N313643414252475335294038353226291Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C42212220312945493518212121212221212Corpus Christi West C4
Corpus Christi Tuloso C211191918352934443117212018202019201Corpus Christi Tuloso C21
Victoria C871NA1824284050433622212927272622261Victoria C87
Ingleside C6851 N231917382940423117201918181920201Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP1431222323302722382622262821202320211Mission C43/AP143
Harlingen Teege C10231232422262024412225243026242421221Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P2441272931312254484027273230313327291Laredo 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.