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Daily Maximum Eight-Hour Ozone Averages for August 2015

The table below lists the peak daily maximum eight-hour ozone concentrations measured in August 2015 in each community where the TCEQ measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

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 with AQI colors
AreaMonitoring SitePOCAugust 2015
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 27063NA
Keller C1726860NA
Frisco C31/C68015861NA
Midlothian OFW C52/A13715452NA
Denton Airport South C56/A163/X15717772NA
Arlington Municipal Airport C6115653NA
Dallas North No.2 C63/C67916660NA
Rockwall Heath C6915956NA
Grapevine Fairway C70/A301/X18216967NA
Kaufman C71/A304/X07116054NA
Granbury C73/C68116962NA
Eagle Mountain Lake C75 17561NA
Parker County C7617261NA
Cleburne Airport C77/C68216156NA
Dallas Hinton St. C401/C60/AH161 37261NA
Dallas Executive Airport C40215853NA
Greenville C1006/A19815552NA
Pilot Point C103215964NA
Italy C1044/A32315753NA
Corsicana Airport C105116155NA
AreaMonitoring SitePOCAugust 2015
Longview C19/A127/C64426361NA
Tyler Airport Relocated C8216465NA
Karnack C85/AFHP30315053NA
AreaMonitoring SitePOCAugust 2015
El Paso-Juarez
El Paso UTEP C12/A125/X15126066NA
Ascarate Park SE C37/A332/A172/X15914862NA
Chamizal C41/AH126 15270NA
Socorro Hueco C49/F31215162NA
Skyline Park C7215570NA
BRAVO Big Bend C67/C316/C656/C6913 N6060NA
Ivanhoe C41415162NA
AreaMonitoring SitePOCAugust 2015
Waco Mazanec C103716058NA
Temple Georgia C104516262NA
Killeen Skylark Field C104715655NA
AreaMonitoring SitePOCAugust 2015
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 24764NA
West Orange C9/A14125266NA
Port Arthur West C28/A128/A22816176NA
Hamshire C64/C65416275NA
SETRPC Port Arthur C6281 N5564NA
SETRPC 40 Sabine Pass C640/C165415360NA
SETRPC Mauriceville 42 C642/C311/C6651 N4851NA
SETRPC 43 Jefferson Co Airport C64315570NA
Nederland High School C1035 16077NA
AreaMonitoring SitePOCAugust 2015
Austin Northwest C3/A32226270NA
Audubon C3815966NA
Fayette County C6012 N5159NA
Dripping Springs School C6141 N6467NA
CAPCOG McKinney Roughs C6841 N5461NA
CAPCOG Lake Georgetown C6901 N5456NA
Gorzycki Middle School C16031 N6064NA
Lockhart C16041 N6163NA
CAPCOG San Marcos Staples Road C16751 N5962NA
CAPCOG Hutto College Street C66021 N5660NA
AreaMonitoring SitePOCAugust 2015
Houston East C1/G31625366NA
Houston Aldine C8/AF108/X150 25260NA
Channelview C15/AH115 34959NA
Northwest Harris Co. C26/A110/X15424955NA
Hou.DeerPrk2 C35/235/1001/AFH139FP23915471NA
Seabrook Friendship Park C4516268NA
Houston Bayland Park C53/A146 16469NA
Conroe Relocated C78/A32114955NA
Manvel Croix Park C8417187NA
Clinton C403/C304/AH113 35765NA
Houston North Wayside C40514452NA
Houston Monroe C40615573NA
Lang C40825566NA
Houston Croquet C40926276NA
Houston Westhollow C41016472NA
Houston Texas Avenue C41115159NA
Park Place C41615874NA
Sheldon C5511 N4556NA
Baytown Wetlands Center C5521 N4351NA
Crosby Library C5531 N4453NA
West Houston C5541 N5564NA
La Porte Sylvan Beach C5561 N6171NA
Mercer Arboretum C5571 N4247NA
Tom Bass C5581 N5269NA
Katy Park C5591 N4856NA
Atascocita C5601 N3745NA
Meyer Park C5611 N3946NA
Bunker Hill Village C5621 N5260NA
Huffman Wolf Road C5631 N3746NA
HRM-3 Haden Road C603/A114 1 N5465NA
Wallisville Road C617 1 N4759NA
Danciger C618 1 N6066NA
Texas City 34th St. C620 1 N6373NA
UH Moody Tower C6951 N6069NA
U of H-Sugarland C6961 N6371NA
UH Coastal Center C6971 N5159NA
UH WG Jones Forest C6981 N4855NA
UH West Liberty C6991 N49NVNA
Lynchburg Ferry C1015/A165 14464NA
Lake Jackson C1016 15867NA
Baytown Garth C101715366NA
Galveston 99th St. C1034/A320/X18316278NA
AreaMonitoring SitePOCAugust 2015
San Antonio
San Antonio Northwest C2327573NA
Camp Bullis C5817074NA
Calaveras Lake C5916361NA
Elm Creek Elementary C5011 N7065NA
Fair Oaks Ranch C5021 N6166NA
New Braunfels Airport C5041 N5759NA
City of Garden Ridge C5051 N6464NA
Seguin Outdoor Learning Center C5061 N5762NA
Heritage Middle School C6221 N6463NA
CPS Pecan Valley C6781 N6261NA
AreaMonitoring SitePOCAugust 2015
Corpus Christi-Victoria
Corpus Christi West C427258NA
Corpus Christi Tuloso C2116958NA
Victoria C8717064NA
Inez C6091 N6355NA
Coleto C6241 N6055NA
Holly Road C6601 N6453NA
Ingleside C6851 N5647NA
Odem C6861 N5950NA
Cuero C16021 N5958NA
AreaMonitoring SitePOCAugust 2015
Lower Rio Grande Valley
Mission C43/AP14314245NA
Brownsville C80/AGP18013329NA
Harlingen Teege C102313737NA
AreaMonitoring SitePOCAugust 2015
Laredo Vidaurri C44/AFGP144/P24415846NA
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
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 - 0.059
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.