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Daily Maximum Eight-Hour Ozone Averages for October 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in October 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 SitePOCOctober 2018POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 231293332293127272622281518211917262413314172Ft. Worth Northwest C13/AH302
Keller C172343335363234303033203021212222202729213141142Keller C17
Frisco C31/C68014041354035363131361930222327221821NVNANANANA1Frisco C31/C680
Midlothian OFW C52/A1371323331313130262931NV2930212322202528143340171Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571NV3836NV323428NVNVNV261820202119192516263871Denton Airport South C56/A163/X157
Arlington Municipal Airport C611313329313031272731212925182221182526133241121Arlington Municipal Airport C61
Dallas North No.2 C63/C67913735333633343131312127191926201618NVNANANANA1Dallas North No.2 C63/C679
Rockwall Heath C6912623NV302824232530182623172020182331NVNANANA1Rockwall Heath C69
Grapevine Fairway C70/A301/X182134363133303428243120NV1921252421263021324051Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071134313334343228323428293020251916NANVNANANANA1Kaufman C71/A304/X071
Granbury C73/C6811303134323132292935223530202323234025203545141Granbury C73/C681
Eagle Mountain Lake C75 1343135363235313234243119212124NV2231193343121Eagle Mountain Lake C75
Parker County C761293133333033283035163222221925243129223546301Parker County C76
Cleburne Airport C77/C6821343337343234303136273434222623223131183646201Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 334333029303328273022302118242117223219354273Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402136NV323132353031342332NV192423192431173643131Dallas Executive Airport C402
Greenville C1006/A1981323032313231263232202517212018151732183236111Greenville C1006/A198
Pilot Point C103214142394236403232362029202420252323NVNANANANA1Pilot Point C1032
Italy C1044/A32312223NV2727NANANV27NV3232181919173230163139141Italy C1044/A323
Corsicana Airport C105113628353738372933313034412929201630NVNANANANA1Corsicana Airport C1051
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C644229303533373826292738333333221017252517253582Longview C19/A127/C644
Tyler Airport Relocated C821302534293136253127303432352614192729182939161Tyler Airport Relocated C82
Karnack C85/AFHP303124303828343522312133272328181016192118213091Karnack C85/AFHP303
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819202122
El Paso-Juarez
El Paso UTEP C12/A125/X151/G1252NV3222252629403941423022253426293025273937192El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X15912830182422244039363627212031273132NVNANANANA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1253323272827444143433221273625282720263835181Chamizal C41/AH126
Socorro Hueco C49/F3121NVNANV52020313036373418213225313227223733131Socorro Hueco C49/F312
Skyline Park C7213640253030324545474838303137293335NVNANANANA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N0NVNANV3642443943433934283727293333283527213BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414/F514130352533293041NVNANV3825273528323328243835211Ivanhoe C414/F514
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Waco
Waco Mazanec C10371323128323332263130253144272718173027173139161Waco Mazanec C1037
Temple Georgia C10451322830313031262629263347272719202826183142191Temple Georgia C1045
Killeen Skylark Field C10471343040363434282832273751283122213225173638191Killeen Skylark Field C1047
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819202122
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 219343829362234342337294845422071426391534182Beaumont-Downtown C2/A112/C2002
West Orange C9/A141225303431372333362537284445452681628401735192West Orange C9/A141
Port Arthur West C28/A128/A228122303431362433352438314344412771427411735151Port Arthur West C28/A128/A228
Hamshire C64/C6541253336263829333323363645444418814NVNANANANA1Hamshire C64/C654
SETRPC Port Arthur C6281 N2530352937233333NV4232NV47453061430432138161SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C1654124333530382736382644364646473371329451937211SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N23343929342130342336274445442491726401533181SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431253437323925363726NV3347484525101930452237181SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 119283126331931322135274442391751324371632151Nederland High School C1035
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Austin
Austin Northwest C3/A32222927313230322624242831422827181924NANV2640202Austin Northwest C3/A322
Audubon C381282732312930232121233140242617172220132540181Audubon C38
Fayette County C6012 N342823292930223026303038322813101921212035202Fayette County C601
Dripping Springs School C6141 N343239393738303029283849323324242928193247231Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N252226282624232423282939262517162121142136161CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N312835363333282626263245282921222824172943191CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N272529302828242423222837242518182221142537171Gorzycki Middle School C1603
Lockhart C16041 N11109NVNANANANANANANANANANANANANANANANANANA1Lockhart C1604
St. Edwards University C16051 N232326292626232021272838242516162018112538151St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N282630322930262524313139242716162020122237141CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N27NVNV272729242627202837262418NANV23162540201CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162NVNVNV3429362923192824383838951215191731132Houston East C1/G316
Houston Aldine C8/AF108/X150 23737415043513733313938564645127162132NVNANA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 32624NANV333331272436323740391561520251730163Channelview C15/AH115
Northwest Harris Co. C26/A110/X15424238445744513438323539554140991521231935162Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391273239343840353429433745434220514NVNANANANA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451303438293835343629NV3546444027414NVNANANANA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 131283333293226272542424034341451218271530131Houston Bayland Park C53/A146
Conroe Relocated C78/A3211363857504451363328363466474812111622281935191Conroe Relocated C78/A321
Manvel Croix Park C8413127322830323130285552414339114112329183781Manvel Croix Park C84
Clinton C403/C304/AH113 327303635333832292641354240401551321301731123Clinton C403/C304/AH113
Houston North Wayside C40512122313330372825223228393333841216NVNANANA1Houston North Wayside C405
Houston Monroe C4061252630282731242620343133353312291625152761Houston Monroe C406
Lang C40822824343933402928263638443938135131620163192Lang C408
Houston Croquet C409231303331313330302845394140371241218281631102Houston Croquet C409
Houston Westhollow C4101362834NV343732323040494540391671421301835141Houston Westhollow C410
Park Place C4161283037343438293026413641403916391729143071Park Place C416
Baytown Wetlands Center C5521 N1517201419192020142628302830123818241327141Baytown Wetlands Center C552
Crosby Library C5531 N1214171516161414131715212122526101671461Crosby Library C553
La Porte Sylvan Beach C5561 N12131412181817161219182422211324111291781La Porte Sylvan Beach C556
Tom Bass C5581 N151822182223222119NVNANANANANANANANANANANANA1Tom Bass C558
Katy Park C5591 N302123292526222624293734282552816191227111Katy Park C559
Atascocita C5601 NNANANANANANANANANANV22372728NV27112162271Atascocita C560
Meyer Park C5611 N22202330253220202020223425265491217920101Meyer Park C561
Bunker Hill Village C5621 NNVNANANANANANANANANANANANANANANANANANANANANA1Bunker Hill Village C562
Huffman Wolf Road C5631 N1617221719201717151815242425838101891571Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N25303934363832302638344439401461220311633121HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N35364133373534353142364549461891928392136191Wallisville Road C617
Danciger C618 1 N292522232729282826444838373476923182039131Danciger C618
Texas City 34th St. C620 1 N35354331403836373150384949453091830362440221Texas City 34th St. C620
UH Moody Tower C6951 N3133424039433335304838484543951220341734101UH Moody Tower C695
UH WG Jones Forest C6981 N36415251445438323437346845461191622271835171UH WG Jones Forest C698
UH West Liberty C6991 N27NV32283030272724322840434313NV12NV341531151UH West Liberty C699
Lynchburg Ferry C1015/A165 128283528363232312629313943401841421321731151Lynchburg Ferry C1015/A165
Lake Jackson C1016 13330332934373432306042444442NV41125242141181Lake Jackson C1016
Baytown Garth C1017131323831353332322738314346441771725381933171Baytown Garth C1017
Galveston 99th St. C1034/A320/X18313234393440373537324740494845311013NVNANANANA1Galveston 99th St. C1034/A320/X183
UH Smith Point C16061 N36363728373434372841364545433191631412037201UH Smith Point C1606
Oyster Creek C1607 1 N36313627353734353264454848442371429282343201Oyster Creek C1607
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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San Antonio
San Antonio Northwest C232303030333034272725363541232719202121122838142San Antonio Northwest C23
Camp Bullis C58 1303133353236272626323643262822222425162939181Camp Bullis C58
Calaveras Lake C591312827332834272626443942252817182223152640231Calaveras Lake C59
Elm Creek Elementary C5011 N272526292631252422483339252518192021132736111Elm Creek Elementary C501
Fair Oaks Ranch C5021 N303131343135272426283542252722222323153137211Fair Oaks Ranch C502
Bulverde Elementary C5031 N282834343136252524273241232719192121142636131Bulverde Elementary C503
New Braunfels Airport C5041 N282730322931252524323240242818182222142336171New Braunfels Airport C504
City of Garden Ridge C5051 N272626332932242423293040232620202223152838231City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N272527292728242422323038242716162019122133131Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N292524302429262524393640262417172121142537201Heritage Middle School C622
CPS Pecan Valley C6781 N38363741384432322955465831351919232163451121CPS Pecan Valley C678
Government Canyon C16101 N272324272528211821323540232520202121163136171Government Canyon C1610
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42312624262730293021425344343617161615212239222Corpus Christi West C4
Corpus Christi Tuloso C2112725NV262427242619354638283115151414182133181Corpus Christi Tuloso C21
Victoria C871363028312933323328405647363916141824NV2537181Victoria C87
Holly Road C6601 N353229303636373630505950434427212220272946291Holly Road C660
Violet C6641 N312723252429262722395342273416191617282637211Violet C664
Ingleside C6851 N302521242728292823NVNANANANANA151414222237201Ingleside C685
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14312527262626272425222631301620142022NVNANANANA1Mission C43/AP143
Harlingen Teege C102312326262929322627NANV3938212713201916212234271Harlingen Teege C1023
AreaMonitoring SitePOCOctober 2018POCMonitoring Site
12345678910111213141516171819202122
Laredo
Laredo Vidaurri C44/AFGP144/P2441252830303035272731343935272418NV2613172434121Laredo Vidaurri C44/AFGP144/P244
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.