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Peak Daily One-Hour Ozone Averages for March 2015

The table below lists the peak daily one-hour ozone concentrations measured in March 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 SitePOCMarch 2015POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 228253334549503823384446384835504936311927424852524446535041422Ft. Worth Northwest C13/AH302
Keller C17225255334245513725344142334535504933331827415053514345564942442Keller C17
Frisco C31/C6801262813364839524331354240324233595234232031435659524144685138531Frisco C31/C680
Midlothian OFW C52/A1371242510334446484027364040344434483828331625384553464148554641481Midlothian OFW C52/A137
Denton Airport South C56/A163/X157127288354649554128384944344535605139232133486258564647695242531Denton Airport South C56/A163/X157
Arlington Municipal Airport C61123257334345493622343940334233444629291523394551464246524640451Arlington Municipal Airport C61
Dallas North No.2 C63/C6791232610354741534026313536303932544632211628465254493844614935501Dallas North No.2 C63/C679
Rockwall Heath C691292814374846564132374135293835525134291933455250494548624935471Rockwall Heath C69
Grapevine Fairway C70/A301/X182126274354644493926334142324736565338191928475554514446594837461Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711262613344549514230293629283634453630291631424550504144604733421Kaufman C71/A304/X071
Granbury C73/C6811262612364848503826374951485238514334311929404952544453534945451Granbury C73/C681
Eagle Mountain Lake C75 126259324147513624364141394735494334321825405250524645574845401Eagle Mountain Lake C75
Parker County C761322818385051544427405348485345514738312132425453524551535353461Parker County C76
Cleburne Airport C77/C6821252312344549503926394248435137453634321819374856524551535144471Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 323261334742524326313938294334514530241329484852484347604935473Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402121214214242483823323531253831464026311224434847443944574331431Dallas Executive Airport C402
Greenville C1006/A1981282715354546524232364131274032475537131934434649554245594633421Greenville C1006/A198
Pilot Point C10321293012344641504031384845324534635336242435445758574344685340591Pilot Point C1032
Italy C1044/A323124239334648513532333836354435483932341427384850464448654637451Italy C1044/A323
Corsicana Airport C1051125249334447503634273331243734423334291524394947484345594535411Corsicana Airport C1051
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442232226314551603943353423223837454124182234355350493946595037392Longview C19/A127/C644
Tyler Airport Relocated C821252325304754604541383729254040443840262033396260614446664939411Tyler Airport Relocated C82
Karnack C85/AFHP3031262623374549594138343427162925554331212237344649514045585540371Karnack C85/AFHP303
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X1512452932453647365057555359555554542939444744514948505251535341472El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591352124NA3242324852514950505051522938404242474344435043475250431Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1412730453346345255545155495052542640464244535250524951545450471Chamizal C41/AH126
Socorro Hueco C49/F3121422628443745355754545055545454503437474146535149505063536152491Socorro Hueco C49/F312
Skyline Park C721463133484249385052535161535454543743474649535451555652525758491Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N312537384041444043475655575954513939434245515752554953535352493BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141392529453543324949504852505251503038463842535047515050515750501Ivanhoe C414
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Waco
Waco Mazanec C1037123228324648513832323841445437533735351420374949474851654841431Waco Mazanec C1037
Temple Georgia C10451212111344852513730353944485738NA3454431520375053515152695153491Temple Georgia C1045
Killeen Skylark Field C10471252417354849483728313850495936533051371725404764585156645352531Killeen Skylark Field C1047
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2301821244146533729242526236471594729213025394247553451704739352Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412281219233946513228202023206751495226273521343952443947664540312West Orange C9/A141
Port Arthur West C28/A128/A2281322619224143473330222428237259514832243426384542444249654736331Port Arthur West C28/A128/A228
Hamshire C64/C6541382222244248523530242629227257574834232726394745494051714741371Hamshire C64/C654
SETRPC Port Arthur C6281 N351620234245493530232330257456534426274222384646493950684639331SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541301119223944464426182028255447494022272518354342402949524134311SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N321323243943463430232527247058555130303713363859512748694840361SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643134162124394347292920222220665750NANANA3424374347464047664537331SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1362221254146513430222424227262555032253825374351484048704739351Nederland High School C1035
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Austin
Austin Northwest C3/A322220218294646524126343442475636483047322222355954484749584744382Austin Northwest C3/A322
Audubon C38121221430465051382631364747NANA493046352322346761544651645049441Audubon C38
Fayette County C6012 N191923264555574528323625495732453745272523354754474753564443392Fayette County C601
Dripping Springs School C6141 NNANANANA4147543426323646505537462841352625355162534549655044451Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N202019294853604127333946536242513148302520395051525358585146411CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N20211831454952NA26303445465633513151372022395361574851655252471CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N222419304748574227343847535941513448363026365556505459695758491Gorzycki Middle School C1603
Lockhart C16041 N191914274651603824343746506445422842272621405249444759544947401Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N192217294853654030373748526046523547332326355052534852554846411CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162331122253746462822NA202417574258394421359415358533150584546392Houston East C1/G316
Houston Aldine C8/AF108/X150 2221324284450533631283025255544624751284414415068623955634649442Houston Aldine C8/AF108/X150
Channelview C15/AH115 3371821214145513223262826225838564632273411414850452951564043343Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542181523254149433727293126304534543238313317374556593752554241402Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239137172021756747292522252219545854383328357414647453349523941321Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451371120214047473432232620226739585527233119504952453554574342351Seabrook Friendship Park C45
Houston Bayland Park C53/A146 13391922324249282323252212424956343522278355649423548503737321Houston Bayland Park C53/A146
Conroe Relocated C78/A3211241428324550494433303226274433523542334920394480833852625250471Conroe Relocated C78/A321
Manvel Croix Park C841391023254244513933252723305474603438263310436554453953564341361Manvel Croix Park C84
Clinton C403/C304/AH113 3301219193944442720242722134740503136202510385045373340443832253Clinton C403/C304/AH113
Houston North Wayside C4051301118213743463121232521154334533134223512344451483041483638311Houston North Wayside C405
Houston Monroe C406132102019343739322521232021495949323420276374642373044493735251Houston Monroe C406
Lang C4082231121223644423723252523254646493641293211365360533549564144372Lang C408
Houston Croquet C409234112224374245302923242227505159353925331039615246NA50524040352Houston Croquet C409
Houston Westhollow C4101291020203643433824252422274345563541293314385652524252574340371Houston Westhollow C410
Houston Texas Avenue C41112871417364046272422242015444147303516298344750433041493735311Houston Texas Avenue C411
Park Place C41613772324374145272620221822534857373925336385254463248524140351Park Place C416
Sheldon C5511 N301621214045473422252723215132534042272813374551463349534044371Sheldon C551
Baytown Wetlands Center C5521 N27121516252932232118201815493435332419229283134342432372828231Baytown Wetlands Center C552
Crosby Library C5531 N271218204044493122222620195032554246302810353858523151584150391Crosby Library C553
West Houston C5541 N181019203645413822242523254336492938243113364750483748563837341West Houston C554
La Porte Sylvan Beach C5561 N38101814414450362824262220433745422619269434345413454554040341La Porte Sylvan Beach C556
Mercer Arboretum C5571 N161220253744443224232720204235503941194313324265613346534041371Mercer Arboretum C557
Tom Bass C5581 N3271920363842292719221822455950313322267365146433344473534311Tom Bass C558
Katy Park C5591 N111116173446443517222519264229482132242612334345503846533733321Katy Park C559
Atascocita C5601 N18121924354143312321241817413050343783113323956543045513843361Atascocita C560
Meyer Park C5611 N1812232539464135252928242741355335392636143438NANANANANANANANA1Meyer Park C561
Bunker Hill Village C5621 N251320213542423522232521244244503436263510345451443544523940341Bunker Hill Village C562
Huffman Wolf Road C5631 N151319224649503528272924185028544655353311314274603454674960441Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N291423234148483229252825206048615157264011455455523553604650411HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N431823264651514133283128248248636047333216454759573759634646401Wallisville Road C617
Danciger C618 1 N341423234146544432292723395248573238242714386451444355534440361Danciger C618
Mustang Bayou C619 1 N3631212242474938372325223257516245362426214560464838555345105381Mustang Bayou C619
Texas City 34th St. C620 1 N422120224549484338242927385846615230232523595346483956634642351Texas City 34th St. C620
UH Moody Tower C6951 N4082325424549292825272226544660464225361041535851365255413381UH Moody Tower C695
U of H-Sugarland C6961 N341122203643473530232522274443513133232511355344483745493936311U of H-Sugarland C696
UH Coastal Center C6971 N331716193639403626172219234534463524162017384537383143463531231UH Coastal Center C697
UH WG Jones Forest C6981 N211325294449494132313226264535523442335017404969783952614848431UH WG Jones Forest C698
UH West Liberty C6991 N341626304650544335313429276238626067414119424771623758735266511UH West Liberty C699
Lynchburg Ferry C1015/A165 1341022213739413128222624165635544433203310384050453447504245351Lynchburg Ferry C1015/A165
Lake Jackson C1016 1371722234050523836242322385352593039222815355646444052524339331Lake Jackson C1016
Baytown Garth C10171431822264449503934283127238247626048333216434658583557624547391Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831411424214145515038262826435644625636352925525949494356624847351Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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San Antonio
San Antonio Northwest C232192013254541653525363437475549393340262928386049484449544742402San Antonio Northwest C23
Camp Bullis C581202113254643673028313135465347423340282729397152524553574946421Camp Bullis C58
Calaveras Lake C591171717234449623629383246515448413139262524385144474347494339361Calaveras Lake C59
Fair Oaks Ranch C5021 NNANANANANANANANANANANANANANANANANANANANANANANANANANANANA4443411Fair Oaks Ranch C502
New Braunfels Airport C5041 NNANANANANANANANANANANANANANANANANANANANANANANANANANANANANA35361New Braunfels Airport C504
Seguin Outdoor Learning Center C5061 NNANANANANANANANANANANANANANANANANANANANANANANANANANA28504543381Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N171714224349663930393144515449413039272525394942474250514340351Heritage Middle School C622
CPS Pecan Valley C6781 N14149193743613021332636454544372836231820395243453846494238341CPS Pecan Valley C678
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42151318224646544622372850625641493545222426385346434456504439352Corpus Christi West C4
Corpus Christi Tuloso C211141317264546504126352949555646453047232529395945414352494237341Corpus Christi Tuloso C21
Victoria C871181520224549523929313241515241413344252518384746444250544438391Victoria C87
Aransas Pass C6591 N251721224646544831413149625541562946222421416045424468544540351Aransas Pass C659
Holly Road C6601 N881627404150411718NANANA4429432337NANANANANANA374060454034311Holly Road C660
Violet C6641 NNANANANANANANANANANA2645546243382944172120375642394146453733301Violet C664
Ingleside C6851 N221620194240494227362842525139492844202222344942394055484136311Ingleside C685
Odem C6861 N141112204342483729342947495041412848202327395342394251464035331Odem C686
Taft C6871 N12911153939463522342543535540412743191924345341383844423833311Taft C687
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143120916273736453635312736435144392418212227345042303247413436321Mission C43/AP143
Brownsville C80/AGP18011210202139424831243329NA564350432319NA2425344541373652443835331Brownsville C80/AGP180
Harlingen Teege C10231151224274044493031332941555444412920232930334650353953474037331Harlingen Teege C1023
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P244116619273840472829402843475344332322201934314145363145464038341Laredo Vidaurri C44/AFGP144/P244
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.