Skip to main content

Peak Daily One-Hour Ozone Averages for June 2023

The table below lists the peak daily one-hour ozone concentrations measured in June 2023 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 2023
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 260627566
Keller C17258617558
Frisco C31/C680167647956
Denton Airport South C56/A163/X157174798659
Arlington Municipal Airport C61156566470
Dallas North No.2 C63/C679160597262
Rockwall Heath C69150505947
Grapevine Fairway C70/A301/X182162668059
Kaufman C71/A304/X071160566863
Granbury C73/C681157636966
Eagle Mountain Lake C75 163597959
Parker County C76154596958
Cleburne Airport C77/C682160616273
Dallas Hinton St. C401/C60/AH161 365617267
Dallas Executive Airport C402163606474
Greenville C1006/A198157556145
Pilot Point C1032167637254
Italy C1044/A323160616062
Corsicana Airport C1051164655859
AreaMonitoring SitePOCJune 2023
Longview C19/A127/C644271647056
Tyler Airport Relocated C82166626558
Karnack C85/AFHP303162596348
AreaMonitoring SitePOCJune 2023
El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159141466763
Chamizal C41/AH126 150536469
Socorro Hueco C49/F312149537265
Ivanhoe C414/F514145496662
Ojo De Agua C1021/FG121/FG22114839NANA
AreaMonitoring SitePOCJune 2023
Waco Mazanec C1037162625858
Temple Georgia C1045156605951
Killeen Skylark Field C1047156615853
AreaMonitoring SitePOCJune 2023
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 283716665
West Orange C9/A141275677548
Port Arthur West C28/A128/A228166706555
Hamshire C64/C654165726361
SETRPC Port Arthur C6281 N73758163
SETRPC 40 Sabine Pass C640/C1654164716456
SETRPC Mauriceville 42 C642/C311/C6651 N78586857
SETRPC 43 Jefferson Co Airport C643166716251
Nederland 17th Street C1035175776758
AreaMonitoring SitePOCJune 2023
Austin North Hills Drive C3/A322254586354
Audubon C38151546047
Dripping Springs School C6141 N52585944
CAPCOG Lake Georgetown C6901 N5336NANA
Lockhart C16041 N51575757
St. Edwards University C16051 N23293532
CAPCOG Bastrop CAMS16121 N50585853
CAPCOG Elgin C16131 N51616753
CAPCOG East Austin C16191 N51565854
CAPCOG Round Rock Brushy Creek W C16201 N49556750
CAPCOG Taylor Murphy Park C16291 N56585960
CAPCOG Lake Kyle Park C16301 N52585636
CAPCOG San Marcos Staples Road C16751 N50565755
AreaMonitoring SitePOCJune 2023
Houston East C1/G3162731147767
Houston Aldine C8/AF108/X150 270997158
Channelview C15/AH115 361937563
Northwest Harris Co. C26/A110/X1542771035750
Hou.DeerPrk2 C35/235/1001/AFH139FP239164796377
Seabrook Friendship Park C45155485481
Houston Bayland Park C53/A146 156696363
Conroe Relocated C78/A321171816352
Manvel Croix Park C84153585271
Clinton C403/C304/AH113 359836067
Houston North Wayside C405/C10331651026562
Houston Monroe C406156715564
Lang C408267876964
Houston Croquet C409255645665
Houston Westhollow C410/C3003151675252
Park Place C416164776170
Houston Harvard Street C417167837068
Sheldon C5511 N62807353
Baytown Wetlands Center C5521 N52636463
Crosby Library C5531 N57817946
West Houston C5541 N60785554
La Porte Sylvan Beach C5561 NNA655683
Mercer Arboretum C5571 N83877450
Tom Bass C5581 N52685471
Katy Park C5591 N55665153
Atascocita C5601 N68797049
Meyer Park C5611 N7711658NA
Bunker Hill Village C5621 N56686053
Huffman Wolf Road C5631 N63728351
UH Moody Tower C6951 N6377NANA
UH WG Jones Forest C6981 N9288NANA
Lynchburg Ferry C1015/A165 162777254
Lake Jackson C1016 155615262
Baytown Garth C1017166939262
Galveston 99th St. C1034/A320/X183163625386
UH Smith Point C16061 N5665NANA
Oyster Creek C1607 1 N55585566
UH Launch Trailer C16111 N6579NANA
Liberty Sam Houston Library C16261 N5965NANA
AreaMonitoring SitePOCJune 2023
San Antonio
San Antonio Northwest C23247536056
Camp Bullis C58 148546656
Calaveras Lake C59143505453
Elm Creek Elementary C5011 N44495851
Fair Oaks Ranch C5021 N43476045
Bulverde Elementary C5031 N36425140
New Braunfels Airport C5041 N41465145
AACOG City of Garden Ridge C505 1 N44495449
Seguin Outdoor Learning Center C5061 N41434539
Heritage Middle School C6221 N41495250
CPS Pecan Valley C6781 N24303332
Government Canyon C16101 N36435046
AreaMonitoring SitePOCJune 2023
Corpus Christi-Victoria
Corpus Christi West C4244504354
Corpus Christi Tuloso C21140524558
Victoria C87144484854
AreaMonitoring SitePOCJune 2023
Lower Rio Grande Valley
Harlingen Teege C1023136485456
AreaMonitoring SitePOCJune 2023
Laredo College C441 N4246NANA
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.