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Daily Maximum Eight-Hour Ozone Averages for October 2016

The table below lists the peak daily maximum eight-hour ozone concentrations measured in October 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 SitePOCOctober 2016
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 24
Keller C17217
Frisco C31/C680125
Midlothian OFW C52/A137121
Denton Airport South C56/A163/X15718
Arlington Municipal Airport C6117
Dallas North No.2 C63/C67919
Rockwall Heath C69124
Grapevine Fairway C70/A301/X182114
Kaufman C71/A304/X071116
Granbury C73/C68119
Eagle Mountain Lake C75 114
Parker County C76128
Cleburne Airport C77/C682113
Dallas Hinton St. C401/C60/AH161 35
Dallas Executive Airport C402113
Greenville C1006/A198110
Pilot Point C1032118
Italy C1044/A323112
Corsicana Airport C1051120
AreaMonitoring SitePOCOctober 2016
Longview C19/A127/C64426
Tyler Airport Relocated C82117
Karnack C85/AFHP30314
AreaMonitoring SitePOCOctober 2016
El Paso-Juarez
El Paso UTEP C12/A125/X151217
Ascarate Park SE C37/A332/A172/X15915
Chamizal C41/AH126 16
Socorro Hueco C49/F31213
Skyline Park C7216
BRAVO Big Bend C67/C316/C656/C6913 N33
Ivanhoe C414111
AreaMonitoring SitePOCOctober 2016
Waco Mazanec C103716
Temple Georgia C104519
Killeen Skylark Field C104718
AreaMonitoring SitePOCOctober 2016
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 219
West Orange C9/A141212
Port Arthur West C28/A128/A228117
Hamshire C64/C654119
SETRPC 40 Sabine Pass C640/C1654126
SETRPC 43 Jefferson Co Airport C643121
Nederland High School C1035 118
AreaMonitoring SitePOCOctober 2016
Austin Northwest C3/A322213
Audubon C38117
Fayette County C6012 N17
Dripping Springs School C6141 N19
CAPCOG McKinney Roughs C6841 N14
CAPCOG Lake Georgetown C6901 N7
Gorzycki Middle School C16031 N39
Lockhart C16041 N11
St. Edwards University C16051 N10
CAPCOG San Marcos Staples Road C16751 N9
CAPCOG Hutto College Street C66021 N7
AreaMonitoring SitePOCOctober 2016
Houston East C1/G31628
Houston Aldine C8/AF108/X150 26
Channelview C15/AH115 314
Northwest Harris Co. C26/A110/X15428
Hou.DeerPrk2 C35/235/1001/AFH139FP239113
Seabrook Friendship Park C45120
Houston Bayland Park C53/A146 15
Conroe Relocated C78/A321116
Manvel Croix Park C8419
Clinton C403/C304/AH113 39
Houston North Wayside C40516
Houston Monroe C40618
Lang C40825
Houston Croquet C40926
Houston Westhollow C41017
Houston Texas Avenue C41117
Park Place C41611
Sheldon C5511 N20
Baytown Wetlands Center C5521 N13
La Porte Sylvan Beach C5561 N26
Mercer Arboretum C5571 N9
Tom Bass C5581 N6
Katy Park C5591 N7
Atascocita C5601 N11
Meyer Park C5611 N9
Bunker Hill Village C5621 N9
Huffman Wolf Road C5631 N11
HRM-3 Haden Road C603/A114 1 N7
Wallisville Road C617 1 N11
Danciger C618 1 N1
Texas City 34th St. C620 1 N26
UH Moody Tower C6951 N16
U of H-Sugarland C6961 N10
UH Coastal Center C6971 N14
UH WG Jones Forest C6981 N30
UH West Liberty C6991 N13
Lynchburg Ferry C1015/A165 120
Lake Jackson C1016 120
Baytown Garth C1017114
Galveston 99th St. C1034/A320/X183135
AreaMonitoring SitePOCOctober 2016
San Antonio
San Antonio Northwest C2329
Camp Bullis C58 18
Calaveras Lake C59116
Elm Creek Elementary C5011 N1
Fair Oaks Ranch C5021 N11
Bulverde Elementary C5031 N6
New Braunfels Airport C5041 N9
City of Garden Ridge C5051 N29
Seguin Outdoor Learning Center C5061 N5
Heritage Middle School C6221 N13
AreaMonitoring SitePOCOctober 2016
Corpus Christi-Victoria
Corpus Christi West C4224
Corpus Christi Tuloso C21118
Victoria C87126
Inez C6091 N14
Holly Road C6601 N29
Violet C6641 N20
Ingleside C6851 N19
AreaMonitoring SitePOCOctober 2016
Lower Rio Grande Valley
Mission C43/AP143126
Brownsville C80/AGP180122
Harlingen Teege C1023117
AreaMonitoring SitePOCOctober 2016
Laredo Vidaurri C44/AFGP144/P244121
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
 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.