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Daily Maximum Eight-Hour Ozone Averages for July 2018

The table below lists the peak daily maximum eight-hour ozone concentrations measured in July 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.

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Month:Year:Report Format: Include time:
Include time
Highlight with AQI colors
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 2343949536050585659344441413738433946NV50NA2Ft. Worth Northwest C13/AH302
Keller C17237445151564656536335505145414049445252NVNA2Keller C17
Frisco C31/C68014253634543395252495065575247445462707273NA1Frisco C31/C680
Midlothian OFW C52/A13712931374341NANANANV2732403130313332414445NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X15713853604443404947544452504645455545525558NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C6113135414953435754503038433533343638444749NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C679138435144453750514847515543403947586561NVNA1Dallas North No.2 C63/C679
Rockwall Heath C6912832403436264645364238423129283350545053NA1Rockwall Heath C69
Grapevine Fairway C70/A301/X1821374558484940525158NV54624742405047616059NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07113038394246375548393640453733333435454645NA1Kaufman C71/A304/X071
Granbury C73/C68113334395448516459463538443735363534424747NA1Granbury C73/C681
Eagle Mountain Lake C75 138435554NV465655703747534441435042485356NA1Eagle Mountain Lake C75
Parker County C761NANANANANANANANANV304250443937403842NV51NA1Parker County C76
Cleburne Airport C77/C68213237405348476560493343473936373634444949NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 33539464850415452494042523936364150565254NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C40213235424850405653493640473735353840444950NA1Dallas Executive Airport C402
Greenville C1006/A19812934404041355048444547443734343759605763NA1Greenville C1006/A198
Pilot Point C103213958614140395049474554465648475851546163NA1Pilot Point C1032
Italy C1044/A3231283038433833474432NANANV2930293733424744NA1Italy C1044/A323
Corsicana Airport C10511304039474539524638NANANV39343236NV474746NA1Corsicana Airport C1051
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64422132453541364941412230363934263338393738NA2Longview C19/A127/C644
Tyler Airport Relocated C8212330423843355043393338393634303635394844NA1Tyler Airport Relocated C82
Karnack C85/AFHP30313447393334223435383140294844473849455759NA1Karnack C85/AFHP303
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X151255505259515055595455525056635862605363NVNA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X159152454954504849564945414652585454515060NVNA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 157525157464651574748464955645758555460NVNA1Chamizal C41/AH126
Socorro Hueco C49/F312151475453464441514540384452455548455655NVNA1Socorro Hueco C49/F312
Skyline Park C72154545657545354605651555861695963615768NVNA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N5051NVNANANV000NVNANANANANANANV445046NA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414152505455494846545146445558585855575864NVNA1Ivanhoe C414
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Waco
Waco Mazanec C103712831444239374644353038403132314134434745NA1Waco Mazanec C1037
Temple Georgia C104513132453341454549273337363233334137434845NA1Temple Georgia C1045
Killeen Skylark Field C104713439463542484751293943444039363840495352NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2142241192734413029403730232118NV45453330NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122534483231474332284239393936323757453033NA2West Orange C9/A141
Port Arthur West C28/A128/A22811619323043534132303330272323232539282526NA1Port Arthur West C28/A128/A228
Hamshire C64/C65411822NV2644514432242636272626223264373026NA1Hamshire C64/C654
SETRPC Port Arthur C6281 N171733295253403632NV323224232425372728NVNA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165411615303040443834NV2327262121222230262425NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N25393933273748352839234439363239485348NVNA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C64311821383241494535364433302525252549342728NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 11414281421NV412926382726202021NANV352525NA1Nederland High School C1035
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Austin
Austin Northwest C3/A32222831422636473945173237363232283539494544NA2Austin Northwest C3/A322
Audubon C3812934432535463540153036363332293437424644NA1Audubon C38
Fayette County C6012 N2321251639404234212525252424222526313029NA2Fayette County C601
Dripping Springs School C6141 N2932392938473945243336383432303539374343NA1Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N2426262134413440192730292728252827343333NA1CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N3341502934463846203843433836313840455049NA1CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 NNV34423139504248243437363233293337NVNV44NA1Gorzycki Middle School C1603
Lockhart C16041 N2627302329423837212830292627242628343435NA1Lockhart C1604
St. Edwards University C16051 N2627322633453540182731302628252831403535NA1St. Edwards University C1605
CAPCOG San Marcos Staples Road C16751 N3131373537554341233133363133283235353939NA1CAPCOG San Marcos Staples Road C1675
CAPCOG Hutto College Street C66021 N2526372931373343192631302927263231433736NA1CAPCOG Hutto College Street C6602
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162233247193843462118NV47263329193337403437NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 23149471847404432247344434737294643474556NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 32337491539383924264949323932273845474347NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X154227333015403639351544NV353127243228333136NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23912327392139514331303836303027212931342931NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45120223220345240302934NVNANANANANV232527NVNA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 11924322043505030202631232421202528312629NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A32113956382234333543256341505039273631383544NA1Conroe Relocated C78/A321
Manvel Croix Park C8411820261841514531212625222323192320222125NA1Manvel Croix Park C84
Clinton C403/C304/AH113 32024342033454426NV32352527242024NANV2729NA3Clinton C403/C304/AH113
Houston North Wayside C40512131391235333822194442293025203234393436NA1Houston North Wayside C405
Houston Monroe C40611721312034483927212529242422182325282325NA1Houston Monroe C406
Lang C40822635362248404732184141333429223131343238NA2Lang C408
Houston Croquet C40921720281838594630212831232321212526292527NA2Houston Croquet C409
Houston Westhollow C41012532342448515334203329262422192425292726NA1Houston Westhollow C410
Park Place C41611926372438554728253335282925202731363131NA1Park Place C416
Baytown Wetlands Center C5521 N91316717231813131220151513101316151513NA1Baytown Wetlands Center C552
Crosby Library C5531 N3448521630374031264456444439334848465555NA1Crosby Library C553
La Porte Sylvan Beach C5561 NNANVNVNANANANANANANANANANANANANANANANANANA1La Porte Sylvan Beach C556
Tom Bass C5581 N1215231020423321131719151918151720221821NA1Tom Bass C558
Katy Park C5591 N917241539383421132520211916141316211922NA1Katy Park C559
Atascocita C5601 N19413352120281994849373928203935403749NA1Atascocita C560
Meyer Park C5611 N1928221026222518122121211917121817201921NA1Meyer Park C561
Bunker Hill Village C5621 N1924291436373820142828232321172223272527NA1Bunker Hill Village C562
HRM-3 Haden Road C603/A114 1 N23334417354240242440432633272233364134NVNA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N25384916434242322934573943332642495051NVNA1Wallisville Road C617
Danciger C618 1 N14151812314437241317171515111414161717NVNA1Danciger C618
Texas City 34th St. C620 1 N16162723354844332329252324222123202021NVNA1Texas City 34th St. C620
UH Moody Tower C6951 N2130412845535233293743323227243438423436NA1UH Moody Tower C695
UH WG Jones Forest C6981 N3652382037363740216539454836263531383542NA1UH WG Jones Forest C698
UH West Liberty C6991 N3147451627283832234146NV4136314444444852NA1UH West Liberty C699
Lynchburg Ferry C1015/A165 1202839NANANANANANV344141382920NV40424036NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 11716241730503829212220182018181918191921NA1Lake Jackson C1016
Baytown Garth C101712739501844424233303458404434284457515147NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831171538NVNV454433242221211918181819171819NA1Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N1616302428473930202120NV23201920181920NVNA1Oyster Creek C1607
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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San Antonio
San Antonio Northwest C2322933373638484847253237373131272937404341NA2San Antonio Northwest C23
Camp Bullis C58 13137453735454245293641413535303345475048NA1Camp Bullis C58
Calaveras Lake C5912728313038544843212729302828242629373535NA1Calaveras Lake C59
Elm Creek Elementary C5011 N2829313238475045252831332930262732343735NA1Elm Creek Elementary C501
Fair Oaks Ranch C5021 N3339473235474146293841433736313347465147NA1Fair Oaks Ranch C502
Bulverde Elementary C5031 N3134453233433942253741413533303443505148NA1Bulverde Elementary C503
New Braunfels Airport C5041 N2428312831453938193030322727232629333434NA1New Braunfels Airport C504
City of Garden Ridge C5051 N2528353433443941202829302727242833444039NA1City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N2526302633444139182929312627242729323434NA1Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N23272929344945391823262725252223263532NVNA1Heritage Middle School C622
CPS Pecan Valley C6781 N2626313034474238152730302627232531373736NA1CPS Pecan Valley C678
Government Canyon C16101 N2933353138444046262733342929242633333736NA1Government Canyon C1610
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4220201826223445271720201919202020171920NVNA2Corpus Christi West C4
Corpus Christi Tuloso C2111818162619254123151918161819181816181820NA1Corpus Christi Tuloso C21
Victoria C871NANV20302837413117NV262423242123242728NVNA1Victoria C87
Ingleside C6851 N2018162620354025141817161718181815181820NA1Ingleside C685
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP14312022212621203223202326201822192020232320NA1Mission C43/AP143
Harlingen Teege C102312122202418213120212125212022202020202122NA1Harlingen Teege C1023
AreaMonitoring SitePOCJuly 2018POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P2441NVNVNV2919464432252530272729252732393837NA1Laredo 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.