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Peak Daily One-Hour Ozone Averages for September 2014

The table below lists the peak daily one-hour ozone concentrations measured in September 2014 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 SitePOCSeptember 2014
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 236
Keller C17235
Frisco C31/C680140
Midlothian OFW C52/A137134
Denton Airport South C56/A163/X157142
Arlington Municipal Airport C61132
Dallas North No.2 C63/C679138
Rockwall Heath C69144
Grapevine Fairway C70/A301/X182136
Kaufman C71/A304/X071138
Granbury C73/C681137
Eagle Mountain Lake C75 132
Parker County C76131
Cleburne Airport C77/C682136
Dallas Hinton St. C401/C60/AH161 336
Dallas Executive Airport C402136
Greenville C1006/A198139
Pilot Point C1032143
Italy C1044/A323134
Corsicana Airport C1051140
AreaMonitoring SitePOCSeptember 2014
Longview C19/A127/C644229
Tyler Airport Relocated C82133
Karnack C85/AFHP303128
AreaMonitoring SitePOCSeptember 2014
El Paso-Juarez
El Paso UTEP C12/A125/X151247
Ascarate Park SE C37/A332/A172/X159144
Chamizal C41/AH126 148
Socorro Hueco C49/F312153
Skyline Park C72144
BRAVO Big Bend C67/C316/C656/C6913 N28
Ivanhoe C414144
Cd Juarez Delphi C6631 N33
AreaMonitoring SitePOCSeptember 2014
Waco Mazanec C1037137
Temple Georgia C1045139
Killeen Skylark Field C1047141
AreaMonitoring SitePOCSeptember 2014
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 233
West Orange C9/A141228
Port Arthur West C28/A128/A228129
Hamshire C64/C654127
SETRPC Port Arthur C6281 N30
SETRPC 40 Sabine Pass C640/C1654131
SETRPC Mauriceville 42 C642/C311/C6651 N27
SETRPC 43 Jefferson Co Airport C643131
Nederland High School C1035 130
AreaMonitoring SitePOCSeptember 2014
Austin Northwest C3/A322237
Audubon C38139
Fayette County C6012 N31
Dripping Springs School C6141 N36
CAPCOG McKinney Roughs C6841 N28
CAPCOG Lake Georgetown C6901 N38
Gorzycki Middle School C16031 N29
Lockhart C16041 N35
CAPCOG San Marcos Staples Road C16751 N32
CAPCOG Hutto College Street C66021 N26
AreaMonitoring SitePOCSeptember 2014
Houston East C1/G316232
Houston Aldine C8/AF108/X150 233
Channelview C15/AH115 325
Northwest Harris Co. C26/A110/X154237
Hou.DeerPrk2 C35/235/1001/AFH139FP239129
Seabrook Friendship Park C45127
Houston Bayland Park C53/A146 125
Conroe Relocated C78/A321149
Manvel Croix Park C84126
Clinton C403/C304/AH113 327
Houston North Wayside C405131
Houston Monroe C406121
Lang C408228
Houston Croquet C409227
Houston Westhollow C410126
Houston Texas Avenue C411124
Park Place C416125
Baytown Wetlands Center C5521 N25
Crosby Library C5531 N25
West Houston C5541 N15
Mercer Arboretum C5571 N33
Tom Bass C5581 N15
Katy Park C5591 N31
Atascocita C5601 N32
Meyer Park C5611 N33
Bunker Hill Village C5621 N24
Huffman Wolf Road C5631 N19
HRM-3 Haden Road C603/A114 1 N31
Wallisville Road C617 1 N32
Danciger C618 1 N24
Mustang Bayou C619 1 N25
Texas City 34th St. C620 1 N25
UH Moody Tower C6951 N29
U of H-Sugarland C6961 N27
UH Coastal Center C6971 N26
UH WG Jones Forest C6981 N44
UH West Liberty C6991 N30
Lynchburg Ferry C1015/A165 124
Lake Jackson C1016 126
Baytown Garth C1017129
Galveston 99th St. C1034/A320/X183131
AreaMonitoring SitePOCSeptember 2014
San Antonio
San Antonio Northwest C23236
Camp Bullis C58140
Calaveras Lake C59134
Elm Creek Elementary C5011 N33
Fair Oaks Ranch C5021 N35
Bulverde Elementary C5031 N40
New Braunfels Airport C5041 N36
City of Garden Ridge C5051 N28
Seguin Outdoor Learning Center C5061 N37
Heritage Middle School C6221 N36
CPS Pecan Valley C6781 N38
AreaMonitoring SitePOCSeptember 2014
Corpus Christi-Victoria
Corpus Christi West C4227
Corpus Christi Tuloso C21125
Victoria C87127
Inez C6091 N24
Coleto C6241 N20
Aransas Pass C6591 N23
Holly Road C6601 N26
Violet C6641 N23
Ingleside C6851 N24
Taft C6871 N28
Cuero C16021 N29
AreaMonitoring SitePOCSeptember 2014
Lower Rio Grande Valley
Mission C43/AP143132
Brownsville C80/AGP180125
Harlingen Teege C1023128
 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.