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Peak Daily One-Hour Ozone Averages for August 2015

The table below lists the peak daily one-hour ozone concentrations measured in August 2015 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 SitePOCAugust 2015
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 279
Keller C17275
Frisco C31/C680161
Midlothian OFW C52/A137157
Denton Airport South C56/A163/X157186
Arlington Municipal Airport C61161
Dallas North No.2 C63/C679174
Rockwall Heath C69162
Grapevine Fairway C70/A301/X182177
Kaufman C71/A304/X071162
Granbury C73/C681173
Eagle Mountain Lake C75 179
Parker County C76177
Cleburne Airport C77/C682164
Dallas Hinton St. C401/C60/AH161 380
Dallas Executive Airport C402164
Greenville C1006/A198158
Pilot Point C1032163
Italy C1044/A323162
Corsicana Airport C1051167
AreaMonitoring SitePOCAugust 2015
Longview C19/A127/C644273
Tyler Airport Relocated C82172
Karnack C85/AFHP303154
AreaMonitoring SitePOCAugust 2015
El Paso-Juarez
El Paso UTEP C12/A125/X151264
Ascarate Park SE C37/A332/A172/X159151
Chamizal C41/AH126 157
Socorro Hueco C49/F312154
Skyline Park C72162
BRAVO Big Bend C67/C316/C656/C6913 N59
Ivanhoe C414157
AreaMonitoring SitePOCAugust 2015
Waco Mazanec C1037167
Temple Georgia C1045168
Killeen Skylark Field C1047160
AreaMonitoring SitePOCAugust 2015
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 254
West Orange C9/A141264
Port Arthur West C28/A128/A228173
Hamshire C64/C654172
SETRPC Port Arthur C6281 N70
SETRPC 40 Sabine Pass C640/C1654163
SETRPC Mauriceville 42 C642/C311/C6651 N51
SETRPC 43 Jefferson Co Airport C643167
Nederland High School C1035 172
AreaMonitoring SitePOCAugust 2015
Austin Northwest C3/A322266
Audubon C38161
Fayette County C6012 N54
Dripping Springs School C6141 N67
CAPCOG McKinney Roughs C6841 N57
CAPCOG Lake Georgetown C6901 N59
Gorzycki Middle School C16031 N65
Lockhart C16041 N65
CAPCOG San Marcos Staples Road C16751 N63
CAPCOG Hutto College Street C66021 N58
AreaMonitoring SitePOCAugust 2015
Houston East C1/G316262
Houston Aldine C8/AF108/X150 256
Channelview C15/AH115 356
Northwest Harris Co. C26/A110/X154251
Hou.DeerPrk2 C35/235/1001/AFH139FP239166
Seabrook Friendship Park C45168
Houston Bayland Park C53/A146 187
Conroe Relocated C78/A321151
Manvel Croix Park C84182
Clinton C403/C304/AH113 365
Houston North Wayside C405149
Houston Monroe C406165
Lang C408259
Houston Croquet C409276
Houston Westhollow C410174
Houston Texas Avenue C411162
Park Place C416169
Sheldon C5511 N48
Baytown Wetlands Center C5521 N48
Crosby Library C5531 N46
West Houston C5541 N60
La Porte Sylvan Beach C5561 N67
Mercer Arboretum C5571 N44
Tom Bass C5581 N61
Katy Park C5591 N54
Atascocita C5601 N40
Meyer Park C5611 N41
Bunker Hill Village C5621 N61
Huffman Wolf Road C5631 N39
HRM-3 Haden Road C603/A114 1 N64
Wallisville Road C617 1 N55
Danciger C618 1 N70
Texas City 34th St. C620 1 N70
UH Moody Tower C6951 N75
U of H-Sugarland C6961 N80
UH Coastal Center C6971 N59
UH WG Jones Forest C6981 N50
UH West Liberty C6991 N50
Lynchburg Ferry C1015/A165 156
Lake Jackson C1016 160
Baytown Garth C1017161
Galveston 99th St. C1034/A320/X183167
AreaMonitoring SitePOCAugust 2015
San Antonio
San Antonio Northwest C23281
Camp Bullis C58175
Calaveras Lake C59166
Elm Creek Elementary C5011 N76
Fair Oaks Ranch C5021 N65
New Braunfels Airport C5041 N61
City of Garden Ridge C5051 N71
Seguin Outdoor Learning Center C5061 N61
Heritage Middle School C6221 N69
CPS Pecan Valley C6781 N69
AreaMonitoring SitePOCAugust 2015
Corpus Christi-Victoria
Corpus Christi West C4278
Corpus Christi Tuloso C21175
Victoria C87178
Inez C6091 N72
Coleto C6241 N69
Holly Road C6601 N68
Ingleside C6851 N61
Odem C6861 N67
Cuero C16021 N62
AreaMonitoring SitePOCAugust 2015
Lower Rio Grande Valley
Mission C43/AP143147
Brownsville C80/AGP180142
Harlingen Teege C1023142
AreaMonitoring SitePOCAugust 2015
Laredo Vidaurri C44/AFGP144/P244162
 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 - 0.059
51 - 100 Not Defined 0.06 - 0.075
101 - 150 0.125 - 0.164 0.076 - 0.095
151 - 200 0.165 - 0.204 0.096 - 0.115
201 - 300 0.205 - 0.404 0.116 - 0.374
301 - 400 0.405 - 0.504 Not Defined
401 - 500 0.505 - 0.604 Not Defined
500+ Not Defined Not Defined

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 beginning 1/1/2013, 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.