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Peak Daily One-Hour Ozone Averages for October 2015

The table below lists the peak daily one-hour ozone concentrations measured in October 2015 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 SitePOCOctober 2015
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2515661554249767458645862
Keller C172485457514150728159616061
Frisco C31/C6801395047434142525755526569
Midlothian OFW C52/A1371505968635648565568615785
Denton Airport South C56/A163/X1571414949453838597252526259
Arlington Municipal Airport C611455460584846685663675577
Dallas North No.2 C63/C6791435251455147696560666278
Rockwall Heath C691455447444636565857496584
Grapevine Fairway C70/A301/X1821415051454440687255556265
Kaufman C71/A304/X0711434949444342504955506184
Granbury C73/C6811726377654960686164635864
Eagle Mountain Lake C75 1475154484144657851555359
Parker County C761585865574857748364595771
Cleburne Airport C77/C6821666573685655646267666076
Dallas Hinton St. C401/C60/AH161 3455358534753706462706183
Dallas Executive Airport C4021435258544656575257655853
Greenville C1006/A1981384943414049475653436172
Pilot Point C10321374947423735456146466660
Italy C1044/A3231516860586555625873566175
Corsicana Airport C10511445150454254596157446277
AreaMonitoring SitePOCOctober 2015
Longview C19/A127/C6442495246363849505861425653
Tyler Airport Relocated C821444946394346665961466656
Karnack C85/AFHP3031514845363942454950406155
AreaMonitoring SitePOCOctober 2015
El Paso-Juarez
El Paso UTEP C12/A125/X151283495334NANA413837644844
Ascarate Park SE C37/A332/A172/X1591653546373742463837604640
Chamizal C41/AH126 1704449363644443431615242
Socorro Hueco C49/F3121604846393939464037585446
Skyline Park C721755354384146403936564351
BRAVO Big Bend C67/C316/C656/C6913 N545453534852493935383848
Ivanhoe C4141634643353536403332534545
AreaMonitoring SitePOCOctober 2015
Waco Mazanec C10371526955485958605462486773
Temple Georgia C10451656561554857645560537471
Killeen Skylark Field C10471615858524854625158526365
AreaMonitoring SitePOCOctober 2015
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2414641373642527953405244
West Orange C9/A1412404540323036505455366148
Port Arthur West C28/A128/A2281505148414353717776425448
Hamshire C64/C6541425047383350648977414849
SETRPC Port Arthur C6281 N475049434160616367425350
SETRPC 40 Sabine Pass C640/C16541494851415259536148455049
SETRPC Mauriceville 42 C642/C311/C6651 N434740333036445447376143
SETRPC 43 Jefferson Co Airport C643144NANANA3845646956374942
Nederland High School C1035 1495345434447598263435749
AreaMonitoring SitePOCOctober 2015
Austin Northwest C3/A3222756863645975845163697867
Audubon C381726362635065795260596859
Fayette County C6012 N616060554458666257546849
Dripping Springs School C6141 N756570614864774870606962
CAPCOG McKinney Roughs C6841 N625555555158714558556746
CAPCOG Lake Georgetown C6901 N715958584963654956576766
Gorzycki Middle School C16031 N726470605275784464656965
Lockhart C16041 N525756484246372633403722
CAPCOG San Marcos Staples Road C16751 N847159636474704660756955
CAPCOG Hutto College Street C66021 N646056584765605056587764
AreaMonitoring SitePOCOctober 2015
Houston East C1/G3162434551464455646856528457
Houston Aldine C8/AF108/X150 2505455494355667654539563
Channelview C15/AH115 3584846423946596346456750
Northwest Harris Co. C26/A110/X1542495349413543616957446056
Hou.DeerPrk2 C35/235/1001/AFH139FP2391544949464660625456536548
Seabrook Friendship Park C451565151555146656053526450
Houston Bayland Park C53/A146 1635763515573907479636551
Conroe Relocated C78/A3211515753463540545856459065
Manvel Croix Park C841726772626385816070796053
Clinton C403/C304/AH113 3525052504459747360566844
Houston North Wayside C4051424144413650565741487446
Houston Monroe C4061514952504561675158NANA42
Lang C4082565258474762738457567357
Houston Croquet C4092635763535472856875646452
Houston Westhollow C4101615658504765877566616353
Houston Texas Avenue C4111514951504759678651596948
Park Place C4161555256534967887271626349
Sheldon C5511 N615250454652546251518558
Baytown Wetlands Center C5521 N454340353439514443375139
Crosby Library C5531 N544946424045496049469959
West Houston C5541 N545252443848749464535951
La Porte Sylvan Beach C5561 N55515043414574544821NANA
Mercer Arboretum C5571 N374342362836394545347048
Tom Bass C5581 N535254494863655262614940
Katy Park C5591 N484747393243728060435244
Atascocita C5601 N383937332939415038387549
Meyer Park C5611 N434646373646485445405845
Bunker Hill Village C5621 N545053464758747456555948
HRM-3 Haden Road C603/A114 1 N615557505158717762538257
Wallisville Road C617 1 N514946424343525453458153
Danciger C618 1 N506166565472534445645046
Mustang Bayou C619 1 N766569646779655751725648
Texas City 34th St. C620 1 N596562716663636054596454
UH Moody Tower C6951 N565556565164787563637252
U of H-Sugarland C6961 N574956454264745969565345
UH Coastal Center C6971 N616061596368545047645246
UH WG Jones Forest C6981 N525553463850606055467961
UH West Liberty C6991 N555647414746466050468466
Lynchburg Ferry C1015/A165 1534542393740595352396049
Lake Jackson C1016 1NANANANA1464634547735553
Baytown Garth C10171565548444546576156478655
Galveston 99th St. C1034/A320/X1831606661727869937355585757
AreaMonitoring SitePOCOctober 2015
San Antonio
San Antonio Northwest C232796177804976795066676354
Camp Bullis C581786276765065804962566656
Calaveras Lake C591746858635562634956616446
Elm Creek Elementary C5011 N807765705877694656696150
Fair Oaks Ranch C5021 N625566564557754551506049
New Braunfels Airport C5041 N756653555662624254646348
City of Garden Ridge C5051 N796457634770694559666855
Seguin Outdoor Learning Center C5061 N655656545856634655566343
Heritage Middle School C6221 N777259654360684859626647
CPS Pecan Valley C6781 N746757585065644351645944
AreaMonitoring SitePOCOctober 2015
Corpus Christi-Victoria
Corpus Christi West C42706464636366454029686345
Corpus Christi Tuloso C211676261656059454223656338
Victoria C871706460715053515151616551
Inez C6091 N635753564247454947555649
Coleto C6241 N474142483538383526414634
Holly Road C6601 N655857565757373724595538
Violet C6641 N757476816870544730827142
Ingleside C6851 N615653575053404124555449
Odem C6861 N625756605561443924605936
Taft C6871 N635452565656383622566037
AreaMonitoring SitePOCOctober 2015
Lower Rio Grande Valley
Mission C43/AP1431566266536058453128555431
Brownsville C80/AGP180151587250525238302524NA16
Harlingen Teege C10231555767515255403126616334
AreaMonitoring SitePOCOctober 2015
Laredo Vidaurri C44/AFGP144/P2441546055535655433127545248
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.