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Daily Maximum Eight-Hour Ozone Averages for May 2016

The table below lists the peak daily maximum eight-hour ozone concentrations measured in May 2016 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 SitePOCMay 2016
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 241NA
Keller C17238NA
Frisco C31/C680137NA
Midlothian OFW C52/A137142NA
Denton Airport South C56/A163/X157139NA
Arlington Municipal Airport C61138NA
Dallas North No.2 C63/C679138NA
Rockwall Heath C69137NA
Grapevine Fairway C70/A301/X182138NA
Kaufman C71/A304/X071134NA
Granbury C73/C681142NA
Eagle Mountain Lake C75 140NA
Parker County C76145NA
Cleburne Airport C77/C682146NA
Dallas Hinton St. C401/C60/AH161 341NA
Dallas Executive Airport C402141NA
Greenville C1006/A198133NA
Pilot Point C1032137NA
Italy C1044/A323142NA
Corsicana Airport C1051136NA
AreaMonitoring SitePOCMay 2016
Longview C19/A127/C644238NA
Tyler Airport Relocated C82138NA
Karnack C85/AFHP303135NA
AreaMonitoring SitePOCMay 2016
El Paso-Juarez
El Paso UTEP C12/A125/X1512NVNA
Ascarate Park SE C37/A332/A172/X1591NVNA
Chamizal C41/AH126 1NVNA
Socorro Hueco C49/F3121NVNA
Skyline Park C721NVNA
Ivanhoe C4141NVNA
AreaMonitoring SitePOCMay 2016
Waco Mazanec C1037140NA
Temple Georgia C1045145NA
Killeen Skylark Field C1047145NA
AreaMonitoring SitePOCMay 2016
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 233NA
West Orange C9/A141237NA
Port Arthur West C28/A128/A228142NA
Hamshire C64/C654138NA
SETRPC Port Arthur C6281 N38NA
SETRPC 40 Sabine Pass C640/C1654147NA
SETRPC Mauriceville 42 C642/C311/C6651 N36NA
SETRPC 43 Jefferson Co Airport C643133NA
Nederland High School C1035 138NA
AreaMonitoring SitePOCMay 2016
Austin Northwest C3/A322243NA
Audubon C38144NA
Fayette County C6012 N40NA
Dripping Springs School C6141 N45NA
CAPCOG McKinney Roughs C6841 N34NA
CAPCOG Lake Georgetown C6901 N42NA
Gorzycki Middle School C16031 N44NA
St. Edwards University C16051 N35NA
CAPCOG San Marcos Staples Road C16751 N39NA
CAPCOG Hutto College Street C66021 N39NA
AreaMonitoring SitePOCMay 2016
Houston East C1/G316238NA
Houston Aldine C8/AF108/X150 237NA
Northwest Harris Co. C26/A110/X154233NA
Hou.DeerPrk2 C35/235/1001/AFH139FP239135NA
Seabrook Friendship Park C45138NA
Houston Bayland Park C53/A146 144NA
Conroe Relocated C78/A321133NA
Manvel Croix Park C84143NA
Clinton C403/C304/AH113 338NA
Houston North Wayside C405132NA
Houston Monroe C406134NA
Lang C408233NA
Houston Croquet C409243NA
Houston Westhollow C410140NA
Houston Texas Avenue C411136NA
Park Place C416140NA
Baytown Wetlands Center C5521 N33NA
Crosby Library C5531 N37NA
La Porte Sylvan Beach C5561 N36NA
Mercer Arboretum C5571 N0NA
Tom Bass C5581 N34NA
Katy Park C5591 N32NA
Atascocita C5601 N33NA
Meyer Park C5611 N26NA
Bunker Hill Village C5621 N33NA
Huffman Wolf Road C5631 N35NA
HRM-3 Haden Road C603/A114 1 NNVNA
Wallisville Road C617 1 NNVNA
Danciger C618 1 NNVNA
Texas City 34th St. C620 1 NNVNA
UH Moody Tower C6951 N36NA
U of H-Sugarland C6961 N45NA
UH Coastal Center C6971 N37NA
UH WG Jones Forest C6981 N35NA
UH West Liberty C6991 N33NA
Lynchburg Ferry C1015/A165 135NA
Lake Jackson C1016 139NA
Baytown Garth C1017137NA
Galveston 99th St. C1034/A320/X183147NA
AreaMonitoring SitePOCMay 2016
San Antonio
San Antonio Northwest C23244NA
Camp Bullis C58 143NA
Calaveras Lake C59140NA
Elm Creek Elementary C5011 N44NA
Fair Oaks Ranch C5021 N39NA
Bulverde Elementary C5031 N41NA
New Braunfels Airport C5041 N38NA
City of Garden Ridge C5051 N42NA
Seguin Outdoor Learning Center C5061 N33NA
Heritage Middle School C6221 N36NA
CPS Pecan Valley C6781 N41NA
AreaMonitoring SitePOCMay 2016
Corpus Christi-Victoria
Corpus Christi West C4229NA
Corpus Christi Tuloso C21131NA
Victoria C87137NA
Inez C6091 N36NA
Holly Road C6601 N23NA
Odem C6861 N24NA
Taft C6871 N24NA
AreaMonitoring SitePOCMay 2016
Lower Rio Grande Valley
Mission C43/AP143136NA
Brownsville C80/AGP180128NA
Harlingen Teege C1023131NA
AreaMonitoring SitePOCMay 2016
Laredo Vidaurri C44/AFGP144/P244136NA
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 - 0.054
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

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.