Skip to main content

Peak Daily One-Hour Ozone Averages for June 2025

The table below lists the peak daily one-hour ozone concentrations measured in June 2025 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 SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 265554252594748457155397152395859543832363233374349454040412Ft. Worth Northwest C13/AH302
Keller C17263533742564745456047406955416363513634373133394544444041392Keller C17
Frisco C31/C680167655541685656545954396473495999514145423236425351514953461Frisco C31/C680
Denton Airport South C56/A163/X157174524239774749465555457057445365503838373232415646514844441Denton Airport South C56/A163/X157
Arlington Municipal Airport C611554844534646354275NA215744335455473235342832364143403538361Arlington Municipal Airport C61
Dallas North No.2 C63/C679154555045544648505939335557355985453237NANA30354342373541361Dallas North No.2 C63/C679
Rockwall Heath C69147464636373138425140334242265282352831292933353939352834331Rockwall Heath C69
Grapevine Fairway C70/A301/X182165514040604652476146346455396081483335363033364838444142421Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071155525362383733527346394141304954413228342934353838403742381Kaufman C71/A304/X071
Granbury C73/C681155545245474632495258415744355439474130393332374544373836381Granbury C73/C681
Eagle Mountain Lake C75 168523944544143435850446948415444533830363333384748453838381Eagle Mountain Lake C75
Parker County C76165514841433934435452435342325438453829343031374143393637371Parker County C76
Cleburne Airport C77/C6821494941463446354656NA355144334938523335343032383641373537341Cleburne Airport C77/C682
Dallas Executive Airport C402152544641383536427444314943315358382632302629334238342935331Dallas Executive Airport C402
Greenville C1006/A1981524549383432NANA48453241432446813830283230293242NA373039361Greenville C1006/A198
Pilot Point C1032166645441805760565358386363535475524447433637456160555255511Pilot Point C1032
Italy C1044/A323154513961383736467145355037334944402931282935374142373536341Italy C1044/A323
Corsicana Airport C1051157615664433933476749464740355247453438363140444346464142451Corsicana Airport C1051
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Tyler-Longview-Marshall
Longview C19/A127/C644264505545372729485354284039353042322926293336345140323842342Longview C19/A127/C644
Tyler Airport Relocated C82150445047342932455057284340272641352726303832294037342933321Tyler Airport Relocated C82
Karnack C85/AFHP303155515143453638284458272741312340292427332532354537333641311Karnack C85/AFHP303
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159157515268504952555461677352576183446355394037583156566760501Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 151555157464549555151576448465171445752384641523349515752471Chamizal C41/AH126
Socorro Hueco C49/F312153515462567455685458616555595565475159444845504042505553471Socorro Hueco C49/F312
Skyline Park C72159555670505550565555758351525873475565514943674060585665531Skyline Park C72
Ivanhoe C414/F514145454756464745495049627448545568434953404437553137445046411Ivanhoe C414/F514
Ojo De Agua C1021/FG121/FG221162545568535050515355726850495064466568524943494765707064611Ojo De Agua C1021/FG121/FG221
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Waco
Waco Mazanec C1037164523946354037405548405342415153443330343037504345413642351Waco Mazanec C1037
Temple Georgia C1045162423137304034375147394648365053462731312729353938393539311Temple Georgia C1045
Killeen Skylark Field C1047169544240375142495454515458405351544046443536384343484347351Killeen Skylark Field C1047
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 257685456432728284631294930282638262122232739444539414755212Beaumont-Downtown C2/A112/C2002
West Orange C9/A141263544942342627253827253426232224221722231626323837253038202West Orange C9/A141
Port Arthur West C28/A128/A228151564743322426233730274844271929242120202132333737293744211Port Arthur West C28/A128/A228
Hamshire C64/C654157594642303124223829264525232330211717181528384131293137181Hamshire C64/C654
SETRPC Port Arthur C6281 N616556534131323347383951462937NANANANANANANANANANANANANANA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541NANANANANANANANANANA224136NANA29183816181621242123182732171SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N585847485131302554321939282921NANANANANANANANANANANANANANA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643152554744352428243830284142262234232019202134344337293940211SETRPC 43 Jefferson Co Airport C643
Nederland 17th Street C1035153584848392530263932274329272337241918192134334337314040201Nederland 17th Street C1035
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Austin
Austin North Hills Drive C3/A322264453454374035375661574045384640412830322629333739403940332Austin North Hills Drive C3/A322
Audubon C38160443338394033374762493942343842412930322627333941393940331Audubon C38
Dripping Springs School C6141 N63453648344336425862574542384745443334342930374040NA4040341Dripping Springs School C614
CAPCOG Lake Georgetown C6901 NNANANANANANANANANANANANANANANANANANA32322425NA3635413537281CAPCOG Lake Georgetown C690
Lockhart C16041 N61373035334339384755523739354440422730312728333434363638271Lockhart C1604
St. Edwards University C16051 NNANANANA263530304750443133293931342324262122252828283030231St. Edwards University C1605
CAPCOG Bastrop CAMS16121 N60402936293534344852443139364138372529292628293838323235261CAPCOG Bastrop CAMS1612
CAPCOG Elgin C16131 N63433040324037375555463841354943412731322832323941363842311CAPCOG Elgin C1613
CAPCOG East Austin C16191 N57403052303631335255523438323935372425292123273330NA33NANA1CAPCOG East Austin C1619
CAPCOG Round Rock Brushy Creek W C16201 NNA473544353837414953544551404348433033332931333739383739251CAPCOG Round Rock Brushy Creek W C1620
CAPCOG Taylor Murphy Park C16291 N60433240293634355247414342354745392630302531324336333435281CAPCOG Taylor Murphy Park C1629
CAPCOG Lake Kyle Park C16301 N57393249293932355254513640354137372628302428293833353333291CAPCOG Lake Kyle Park C1630
CAPCOG San Marcos Staples Road C16751 N54414793NANANANA54NANANANANANANANANANANANANANANANANANANANA1CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Houston-Galveston-Brazoria
Houston East C1/G316270665343453333285348425929362735292426292433465238444047232Houston East C1/G316
Houston Aldine C8/AF108/X150 270755962634334375847346529453036322932362941535451615357262Houston Aldine C8/AF108/X150
Channelview C15/AH115 3NA634848483235315552396624393334302325312831443939363948253Channelview C15/AH115
Northwest Harris Co. C26/A110/X154257625746563832315735385333343336263236403037545653515756292Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139/FP239157614846353131284646495938313132292224272330433740414244241Hou.DeerPrk2 C35/235/1001/AFH139/FP239
Seabrook Friendship Park C45158614644322826233337395141282527231823252227353538333239221Seabrook Friendship Park C45
Houston Bayland Park C53/A146 164575341443429325167435930303434252829322528405144353844251Houston Bayland Park C53/A146
Conroe Relocated C78/A321158936262595750358532345730432942444151544345634356565468381Conroe Relocated C78/A321
Manvel Croix Park C84150514435252925224148325324252929232221212024293732273033201Manvel Croix Park C84
Clinton C403/C304/AH113 361584637432832294260466133322823211921222131354039373643223Clinton C403/C304/AH113
Houston North Wayside C405/C10331585846405228NANA4338265416302224222025251831384638453949191Houston North Wayside C405/C1033
Houston Monroe C40615252453927272622NA53405126262827231921211925NA3336333037201Houston Monroe C406
Lang C408262554940463433335347315427362829242430312326426740374348212Lang C408
Houston Croquet C409255544839363227274662375328263035222529282226364340323640232Houston Croquet C409
Houston Westhollow C410/C3003152514437363029243948314826272929232126272525375037303539221Houston Westhollow C410/C3003
Park Place C416158554942NANANANANA60455728303131262326252227354341413741231Park Place C416
Houston Harvard Street C417160575041463730335351345837363234262730312629415743434146281Houston Harvard Street C417
Sheldon C5511 N6458434643302925553324631533272622192328242539342836NANANA1Sheldon C551
Baytown Wetlands Center C5521 N54534643342725254337435023302632201924242325293034273637251Baytown Wetlands Center C552
Crosby Library C5531 N776047484437363369382715NANANA3030273332262736393637354561Crosby Library C553
West Houston C5541 N55575144463327274849345628303132242532322628477842354644231West Houston C554
La Porte Sylvan Beach C5561 NNANANA4035292423443519NANANANANANANANANANANANANANANANANANA1La Porte Sylvan Beach C556
Mercer Arboretum C5571 N7284646266524041713530542843293430334243303957424953NANANA1Mercer Arboretum C557
Tom Bass C5581 N52554638263126254161415533273130242023232022293436273137221Tom Bass C558
Katy Park C5591 N52504432332926254140344530283133191822222025336835283543211Katy Park C559
Atascocita C5601 N76705259564135336536286124442530302636403332504442494055221Atascocita C560
Meyer Park C5611 N59705950654442295937275625312533322633352627545649515757231Meyer Park C561
Bunker Hill Village C5621 N58555037383029254549274824302628222224282125426237313640191Bunker Hill Village C562
Huffman Wolf Road C5631 N726751545046453881392922NANANA393NANANANANA42374038405451Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N716451434032333054604083273629NANANANANANANANANANANANANANA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N725846453734303155583552253433NANANANANANANANANANANANANANA1Wallisville Road C617
Texas City 34th St. C620 1 N575648432527242141304051392732NANANANANANANANANANANANANANA1Texas City 34th St. C620
Lynchburg Ferry C1015/A165 167604745363031284945415431292734272223282528353638333744241Lynchburg Ferry C1015/A165
Lake Jackson C1016 146514239212926233925314932272527252223262325273235253028221Lake Jackson C1016
Baytown Garth C1017179655149413733336264365627383439292631322731384040344045271Baytown Garth C1017
Galveston 99th St. C1034/A320/X183162605549283227254628405944313332252324252328334349314241251Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N57534739212926234125335334262325262022292328NANANANANANANA1Oyster Creek C1607
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
San Antonio
San Antonio Northwest C23248372940323527344656634440343344362625332726324237383533372San Antonio Northwest C23
Camp Bullis C58 156463646354333414756724343363544392834322627344443423735341Camp Bullis C58
Calaveras Lake C59154343034323731333951554234313437362429302525303333323433271Calaveras Lake C59
Elm Creek Elementary C5011 N564232493241303643565645383331423425283533213013841423630301Elm Creek Elementary C501
Fair Oaks Ranch C5021 N57503746374835455262754646393446403037362627354747484237361Fair Oaks Ranch C502
Bulverde Elementary C5031 N46352930243325324043603135302636322333322727333841443937291Bulverde Elementary C503
New Braunfels Airport C5041 N51323027182422243135411719172020251723242222263434363534251New Braunfels Airport C504
AACOG City of Garden Ridge C505 1 N593526820352728394553323427293330222322242726178353634281AACOG City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N61383233293935364254524436343542402723312627303635383635281Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N58403438364335384450644838343944382531322527313635343735291Heritage Middle School C622
CPS Pecan Valley C6781 N48302530263225293245492829252532301821231919223028272724241CPS Pecan Valley C678
Government Canyon C16101 N504133483542313743556NA39323546372528282222273533333330331Government Canyon C1610
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Corpus Christi-Victoria
Corpus Christi West C4249252521233128252728413431204438292423282422252523252626262Corpus Christi West C4
Corpus Christi Tuloso C21148212320222927222727403028194528272222252121242623222625251Corpus Christi Tuloso C21
Victoria C87155252824253129263728454229243132362225262424313833243130241Victoria C87
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Lower Rio Grande Valley
Mission C43/AP143130242826273026262926324230242130322929272222222826272629241Mission C43/AP143
Harlingen Teege C1023134262627253228252727302927252532312930272524252226272526221Harlingen Teege C1023
AreaMonitoring SitePOCJune 2025POCMonitoring Site
1234567891011121314151617181920212223242526272829
Laredo
Laredo College C441 N43363637394233354141464436283140423635392825303231343228271Laredo College C44
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.