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Peak Daily One-Hour Ozone Averages for May 2016

The table below lists the peak daily one-hour ozone concentrations measured in May 2016 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 SitePOCMay 2016
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 247
Keller C17243
Frisco C31/C680142
Midlothian OFW C52/A137146
Denton Airport South C56/A163/X157144
Arlington Municipal Airport C61141
Dallas North No.2 C63/C679142
Rockwall Heath C69139
Grapevine Fairway C70/A301/X182141
Kaufman C71/A304/X071138
Granbury C73/C681148
Eagle Mountain Lake C75 143
Parker County C76149
Cleburne Airport C77/C682150
Dallas Hinton St. C401/C60/AH161 346
Dallas Executive Airport C402145
Greenville C1006/A198136
Pilot Point C1032140
Italy C1044/A323148
Corsicana Airport C1051137
AreaMonitoring SitePOCMay 2016
Longview C19/A127/C644240
Tyler Airport Relocated C82140
Karnack C85/AFHP303139
AreaMonitoring SitePOCMay 2016
El Paso-Juarez
El Paso UTEP C12/A125/X151253
Ascarate Park SE C37/A332/A172/X159151
Chamizal C41/AH126 157
Socorro Hueco C49/F312141
Skyline Park C72157
Ivanhoe C414151
AreaMonitoring SitePOCMay 2016
Waco Mazanec C1037144
Temple Georgia C1045149
Killeen Skylark Field C1047149
AreaMonitoring SitePOCMay 2016
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 241
West Orange C9/A141240
Port Arthur West C28/A128/A228146
Hamshire C64/C654142
SETRPC Port Arthur C6281 N40
SETRPC 40 Sabine Pass C640/C1654150
SETRPC Mauriceville 42 C642/C311/C6651 N39
SETRPC 43 Jefferson Co Airport C643136
Nederland High School C1035 142
AreaMonitoring SitePOCMay 2016
Austin Northwest C3/A322248
Audubon C38147
Fayette County C6012 N43
Dripping Springs School C6141 N47
CAPCOG McKinney Roughs C6841 N35
CAPCOG Lake Georgetown C6901 N46
Gorzycki Middle School C16031 N49
St. Edwards University C16051 N39
CAPCOG San Marcos Staples Road C16751 N42
CAPCOG Hutto College Street C66021 N42
AreaMonitoring SitePOCMay 2016
Houston East C1/G316248
Houston Aldine C8/AF108/X150 241
Northwest Harris Co. C26/A110/X154236
Hou.DeerPrk2 C35/235/1001/AFH139FP239141
Seabrook Friendship Park C45140
Houston Bayland Park C53/A146 159
Conroe Relocated C78/A321135
Manvel Croix Park C84151
Clinton C403/C304/AH113 348
Houston North Wayside C405138
Houston Monroe C406140
Lang C408239
Houston Croquet C409258
Houston Westhollow C410152
Houston Texas Avenue C411151
Park Place C416155
Baytown Wetlands Center C5521 N38
Crosby Library C5531 N40
La Porte Sylvan Beach C5561 N38
Mercer Arboretum C5571 NNA
Tom Bass C5581 N39
Katy Park C5591 N36
Atascocita C5601 N38
Meyer Park C5611 N29
Bunker Hill Village C5621 N43
Huffman Wolf Road C5631 N40
HRM-3 Haden Road C603/A114 1 N44
Wallisville Road C617 1 N43
Danciger C618 1 N37
Texas City 34th St. C620 1 N34
UH Moody Tower C6951 N49
U of H-Sugarland C6961 N65
UH Coastal Center C6971 N40
UH WG Jones Forest C6981 N37
UH West Liberty C6991 N39
Lynchburg Ferry C1015/A165 140
Lake Jackson C1016 142
Baytown Garth C1017144
Galveston 99th St. C1034/A320/X183149
AreaMonitoring SitePOCMay 2016
San Antonio
San Antonio Northwest C23246
Camp Bullis C58 146
Calaveras Lake C59142
Elm Creek Elementary C5011 N47
Fair Oaks Ranch C5021 N43
Bulverde Elementary C5031 N44
New Braunfels Airport C5041 N41
City of Garden Ridge C5051 N45
Seguin Outdoor Learning Center C5061 N35
Heritage Middle School C6221 N40
CPS Pecan Valley C6781 N44
AreaMonitoring SitePOCMay 2016
Corpus Christi-Victoria
Corpus Christi West C4233
Corpus Christi Tuloso C21137
Victoria C87139
Inez C6091 N40
Holly Road C6601 N26
Odem C6861 N26
Taft C6871 N26
AreaMonitoring SitePOCMay 2016
Lower Rio Grande Valley
Mission C43/AP143141
Brownsville C80/AGP180130
Harlingen Teege C1023133
AreaMonitoring SitePOCMay 2016
Laredo Vidaurri C44/AFGP144/P244140
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.