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Daily Maximum Eight-Hour Ozone Averages for August 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in August 2018 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 SitePOCAugust 2018
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 247585546272929403615111412NA
Keller C17262837861374446545436303321NA
Frisco C31/C680160686766395141436750343724NA
Midlothian OFW C52/A137168615950323834385233242824NA
Denton Airport South C56/A163/X157158817667395350475644333923NA
Arlington Municipal Airport C61173726455344029515237272720NA
Dallas North No.2 C63/C679163707060374442436637263019NA
Rockwall Heath C691565960523135303659NV272116NA
Grapevine Fairway C70/A301/X1821618378NV354744505835283122NA
Kaufman C71/A304/X071160616054373839434433312628NA
Granbury C73/C681171716859363838425546423223NA
Eagle Mountain Lake C75 164848465384645565532343520NA
Parker County C76168787562393941585444443527NA
Cleburne Airport C77/C682181726858364341385239382822NA
Dallas Hinton St. C401/C60/AH161 366726757364238476333312818NA
Dallas Executive Airport C4021NANV635638413749NVNV303024NA
Greenville C1006/A198157615958343736386247292724NA
Pilot Point C1032158766770435556NV6351394425NA
Italy C1044/A323165626351333930323530282222NA
Corsicana Airport C1051162626254394240354638322431NA
AreaMonitoring SitePOCAugust 2018
Longview C19/A127/C644256616753344230353839422424NA
Tyler Airport Relocated C82159696952333437384638351926NA
Karnack C85/AFHP303149495350333838393728232125NA
AreaMonitoring SitePOCAugust 2018
El Paso-Juarez
El Paso UTEP C12/A125/X151/G125266666786625046464755576067NA
Ascarate Park SE C37/A332/A172/X159167636481564038494550535567NA
Chamizal C41/AH126 166687087604340484753565970NA
Socorro Hueco C49/F312152606171533835414546494973NA
Skyline Park C72176696984615049495058576071NA
BRAVO Big Bend C67/C316/C656/C6913 N65666560434136353938363739NA
Ivanhoe C414/F514169677187564441535152545674NA
AreaMonitoring SitePOCAugust 2018
Waco Mazanec C1037163636847333832373943362627NA
Temple Georgia C1045166706940333837414147322629NA
Killeen Skylark Field C10471687572NANANANANV4349352935NA
AreaMonitoring SitePOCAugust 2018
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 252496830332420252630251918NA
West Orange C9/A141248496635292426323025272222NA
Port Arthur West C28/A128/A2281525060342928222423282519NVNA
Hamshire C64/C654156586332282121262633221721NA
SETRPC Port Arthur C6281 N555862352829222423262619NVNA
SETRPC 40 Sabine Pass C640/C1654160605636262921212426282020NA
SETRPC Mauriceville 42 C642/C311/C6651 N46456134322723303226292128NA
SETRPC 43 Jefferson Co Airport C643153506535272721252427251920NA
Nederland High School C1035 144425929222117222223201717NA
AreaMonitoring SitePOCAugust 2018
Austin Northwest C3/A322266756937313837394545312527NA
Audubon C38163747040314037404444272127NA
Fayette County C6012 N67707533323330343738272124NA
Dripping Springs School C6141 N65776840313535394342322526NA
CAPCOG McKinney Roughs C6841 N60666532273231343535241923NA
CAPCOG Lake Georgetown C6901 N63736939323740414745302429NA
Gorzycki Middle School C16031 N73827241333839424750352729NA
Lockhart C16041 N66665932263131353533292323NA
St. Edwards University C16051 N66706434283233363943312224NA
CAPCOG San Marcos Staples Road C16751 N84827243344039424443372728NA
CAPCOG Hutto College Street C66021 N60656333273334334037291923NA
AreaMonitoring SitePOCAugust 2018
Houston East C1/G316252556326302117231825181319NA
Houston Aldine C8/AF108/X150 256657034453328323238242129NA
Channelview C15/AH115 357575930312823302435221618NA
Northwest Harris Co. C26/A110/X15425659713658363129293629NVNANA
Hou.DeerPrk2 C35/235/1001/AFH139FP239163676529313123262633251821NA
Seabrook Friendship Park C45176666035343023272529241517NA
Houston Bayland Park C53/A146 1667473273730272422332417NVNA
Conroe Relocated C78/A321154NV6342394539393337302345NA
Manvel Croix Park C84170786727322822211927211920NA
Clinton C403/C304/AH113 3NANV65NANANANV202228251820NA
Houston North Wayside C405149505623321917201925201319NA
Houston Monroe C406157615923292522212028201517NA
Lang C4082NANANV30413129292833252025NA
Houston Croquet C40926370NV27352926202131241823NA
Houston Westhollow C410161697629393026252635281921NA
Park Place C416162646928333125232532251822NA
Baytown Wetlands Center C5521 N344338171615131512161089NA
Crosby Library C5531 N54566033313330392436262027NA
La Porte Sylvan Beach C5561 N4146NV2323191316151916910NA
Tom Bass C5581 N46585119252216151421141415NA
Katy Park C5591 N48546722302319172025161215NA
Atascocita C5601 N455159262424142114235415NA
Meyer Park C5611 N33354321291816181618141016NA
Bunker Hill Village C5621 N53586023322623222228201419NA
Huffman Wolf Road C5631 N30273319182120231921171418NA
HRM-3 Haden Road C603/A114 1 N565656252927222721312114NVNA
Wallisville Road C617 1 N636765363635283732432823NVNA
Danciger C618 1 N637256222622NV1716221815NVNA
Texas City 34th St. C620 1 N9673664038NV263727NV2923NVNA
UH Moody Tower C6951 N68697332373430262836282124NA
UH WG Jones Forest C6981 N55576541414234353235282238NA
UH West Liberty C6991 N51485831313032413131271927NA
Lynchburg Ferry C1015/A165 152596031282924252033231820NA
Lake Jackson C1016 177705628302821201626211817NA
Baytown Garth C1017159636233333325352943262126NA
Galveston 99th St. C1034/A320/X183172645840372924232126262119NA
UH Smith Point C16061 N73716035333227282731252023NA
Oyster Creek C1607 1 N9468NV333131NV2122272620NVNA
AreaMonitoring SitePOCAugust 2018
San Antonio
San Antonio Northwest C23267837042294935384143292225NA
Camp Bullis C58 164837144314438434544302226NA
Calaveras Lake C59179736738274132333235292023NA
Elm Creek Elementary C5011 N76796941274233333536312626NA
Fair Oaks Ranch C5021 N63777144314238434642312326NA
Bulverde Elementary C5031 N65786941294140444741312125NA
New Braunfels Airport C5041 N70696137293633333634302323NA
City of Garden Ridge C5051 N69806538283833343637292122NA
Seguin Outdoor Learning Center C5061 N67696138303632343633302024NA
Heritage Middle School C6221 N757061342534272929302419NVNA
CPS Pecan Valley C6781 N76766337253932323436291822NA
Government Canyon C16101 N66807343275234374144262025NA
AreaMonitoring SitePOCAugust 2018
Corpus Christi-Victoria
Corpus Christi West C4262665024272324272224262219NA
Corpus Christi Tuloso C21158NVNV23221919241921241718NA
Victoria C87174716628283125272830292023NA
Violet C6641 N62635022222119251920231718NA
Ingleside C6851 N61615023252124242225262017NA
AreaMonitoring SitePOCAugust 2018
Lower Rio Grande Valley
Mission C43/AP143141625624272826312925252420NA
Harlingen Teege C1023134564524242424302627262121NA
AreaMonitoring SitePOCAugust 2018
Laredo Vidaurri C44/AFGP144/P244162665841302931323534322926NA
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
  • The AQI for ozone is based on either the peak eight-hour running average since midnight OR the peak one-hour measurement since midnight.

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, 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.