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Daily Maximum Eight-Hour Ozone Averages for March 2015

The table below lists the peak daily maximum eight-hour ozone concentrations measured in March 2015 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 SitePOCMarch 2015POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 22423NVNV424345312134394234463144403024152236444645NV43484536232Ft. Worth Northwest C13/AH302
Keller C17223223324039463223313839314229454330261624364546463941504437202Keller C17
Frisco C31/C680126265354434473729313837314029484127161929405053483842604834231Frisco C31/C680
Midlothian OFW C52/A137124237333943453124293332314130413121291223324247423943504335211Midlothian OFW C52/A137
Denton Airport South C56/A163/X157125264344444493625334141314330514431161828445351524243584936201Denton Airport South C56/A163/X157
Arlington Municipal Airport C61123215333942452920293233303928423321261124324145424041484233181Arlington Municipal Airport C61
Dallas North No.2 C63/C679123222344335473423253232313828473524151326424751443740574531201Dallas North No.2 C63/C679
Rockwall Heath C69126268364542513929343832293732463827201730414848464145574532231Rockwall Heath C69
Grapevine Fairway C70/A301/X18212525NVNV4239453225303838304330464232151725424849474143544532181Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071125237354246493728263428243530413223241528394347483942554430231Kaufman C71/A304/X071
Granbury C73/C681125258354546473221334346425036443629261723334547474148494642241Granbury C73/C681
Eagle Mountain Lake C75 124246313844463222313638354529443828251622374644454242504437211Eagle Mountain Lake C75
Parker County C761302715374649504125364746455136484132291927385049484247514945291Parker County C76
Cleburne Airport C77/C6821232110334246473624363742394834423128291418314449474246494639191Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 323210334237463021283633284129453420191126444349434044544529153Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402119183153736442920253128253725413119251023334344393639493926191Dallas Executive Airport C402
Greenville C1006/A198125259354243493931333729263628424223111731404346503941514431201Greenville C1006/A198
Pilot Point C1032127294334239443629324040304231514829172230424953514041574933191Pilot Point C1032
Italy C1044/A3231211973444464732302636NV294031433125301125314446434044554334221Italy C1044/A323
Corsicana Airport C1051123224354244463431253229223530393030251325324444463942524233231Corsicana Airport C1051
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C6442192120364246523638333222213430413721132030324848473743534633182Longview C19/A127/C644
Tyler Airport Relocated C821222122354551554138353426233734423429211830365752534145604636241Tyler Airport Relocated C82
Karnack C85/AFHP3031242517394347533835313125162620423928171934294446473041504936171Karnack C85/AFHP303
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15123723334132413442504949535350524726344239364847454846484847NVNA2El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X15912911NVNANV39303845454644494649432730363733433938404440414444141Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1341927422838314346474446454550442234433534494947504348505042321Chamizal C41/AH126
Socorro Hueco C49/F3121371924423540334547494853524951463132433638484846484752475248181Socorro Hueco C49/F312
Skyline Park C721382833453845364348504956514952483139454240494949525048495150441Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N27NV31313938403839465452545752483336393435475450534748514943313BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C4141341825433241304146474549484649432734423534484846494547485045221Ivanhoe C414
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Waco
Waco Mazanec C1037122207334346483530273535384634463231291118324645454446564436241Waco Mazanec C1037
Temple Georgia C1045120209354448473128323637425336NANV44341417334548474549604844251Temple Georgia C1045
Killeen Skylark Field C10471242213374545453026293544465534462841321622364354514652574943261Killeen Skylark Field C1047
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2271119223944463124212323175955504323182516354044482747574537152Beaumont-Downtown C2/A112/C2002
West Orange C9/A141224917223743442826162021166046444320212412293646432843554336192West Orange C9/A141
Port Arthur West C28/A128/A228127131720394144272819232219605146402121241834NV40413445554435211Port Arthur West C28/A128/A228
Hamshire C64/C6541311620224045493129232627196049474424212317364342452947584538171Hamshire C64/C654
SETRPC Port Arthur C6281 N291016213943472928192120225951473820242915334344463646574537221SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C1654126717203741413324151823204743453318222015293939392641463932211SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N281119223741423227202424195748464324232610323749472645584538101SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643128111922374143252617212117574843NANANANV1733414344304455NVNVNA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1301319224043472828202323186252474223222618343945453345574537191Nederland High School C1035
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Austin
Austin Northwest C3/A322220197334244473022303339435335392541271919334848434246544441272Austin Northwest C3/A322
Audubon C381212013344246442724283241NVNANANV2641301920325454484347584844271Audubon C38
Fayette County C6012 N1717213043515341262934NVNV5230402540242015334448454350534240292Fayette County C601
Dripping Springs School C6141 NNANANANANV42492823303339455135412439282223324656474146574737271Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N191915334551523426293742505840442643271818364748474753554643311CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 NNV2013344145NVNANV263340435232432843311719354755504348594944281CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N222216344446533425313543495638432844302423325050405057655351361Gorzycki Middle School C1603
Lockhart C16041 N18178314348543622293641455540372440232219354344424448514441291Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N2020113445505937243535445056444428422920223447484744NV514539291CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G316222720223441412318NANV1312463642342916276354549482642554341202Houston East C1/G316
Houston Aldine C8/AF108/X150 2161019244146463423272720194539503840133111384655523350574445182Houston Aldine C8/AF108/X150
Channelview C15/AH115 3251117183942373018252520164734372824141910384242402745523938173Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542161220233744373523272920234130432735242615344352503246504039252Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP23912791819494441242322221715454441332721256363843422943493837151Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4513071820384343262822221422503746412519257414247423047534239201Seabrook Friendship Park C45
Houston Bayland Park C53/A146 119616193238411920232114NV3938432628NV239325045403243473535121Houston Bayland Park C53/A146
Conroe Relocated C78/A3211161321254247454129293022204230453038253717374368643249574847231Conroe Relocated C78/A321
Manvel Croix Park C84131721223842462529252317264957463036212712385548433549534238151Manvel Croix Park C84
Clinton C403/C304/AH113 321815193741382616242417939363526271421933444034283641373083Clinton C403/C304/AH113
Houston North Wayside C40512091420354039281522231511353139262612241030404342263644353351Houston North Wayside C405
Houston Monroe C406124516173134351922201812184147392726NV228334238352541463632121Houston Monroe C406
Lang C408214818193340373020232014194139412932182510344652462945514040162Lang C408
Houston Croquet C40922672021353942202622211422454249303421271036534943NANV493938132Houston Croquet C409
Houston Westhollow C410117817193338382721232216224037473035232811365148473647514138211Houston Westhollow C410
Houston Texas Avenue C41111551117323838231621201114383538272713229314344382538463633121Houston Texas Avenue C411
Park Place C4161275202134384117222017917433943323219268334647432743484038151Park Place C416
Sheldon C5511 N221317213842383120242521164230393229152012354143402944483939131Sheldon C551
Baytown Wetlands Center C5521 N1991114232727211917171511352629261615178262730312229332624111Baytown Wetlands Center C552
Crosby Library C5531 N16101317374139292022241814422839332918239333549452745524042161Crosby Library C553
West Houston C5541 N12716203338383018232216203931412432192511334346433243483732181West Houston C554
La Porte Sylvan Beach C5561 N2881420384243292223231821353033312115217373640393146503936211La Porte Sylvan Beach C556
Mercer Arboretum C5571 N121016203640402922212517153629423030112810303851472841483738111Mercer Arboretum C557
Tom Bass C5581 N2641618323539202419191218404839262717228324541393039443532141Tom Bass C558
Katy Park C5591 N10813173040372816212314213725381929192011304042413241473531181Katy Park C559
Atascocita C5601 N13915193337372820212216133527382726NVNV10303546442639463637121Atascocita C560
Meyer Park C5611 N15102022364338312026271920393242303318261232NVNANANANANANANANA1Meyer Park C561
Bunker Hill Village C5621 N1681718323938252021221418393640273019258324646403141463736151Bunker Hill Village C562
Huffman Wolf Road C5631 N1210132042434232NV26252013422643363218259293758513047574648131Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N24101822374441282025221815484141363619279384847483050554543211HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N321519244449473729282926185842474431242714414554503453574340201Wallisville Road C617
Danciger C618 1 N291121223844503229272421334842442635212614365548433950524338231Danciger C618
Mustang Bayou C619 1 N291919203945462934222319285146493631202514395544453449524459271Mustang Bayou C619
Texas City 34th St. C620 1 N321517194246433432262720355341444126192117434944463449564438251Texas City 34th St. C620
UH Moody Tower C6951 N216202238424324242523142947414835331929113749514632475238NVNA1UH Moody Tower C695
U of H-Sugarland C6961 N22819203439432426232015254137452430192410314742433341463734201U of H-Sugarland C696
UH Coastal Center C6971 N25121517353737262419201422403237292015189314034362838423328131UH Coastal Center C697
UH WG Jones Forest C6981 N161120244147443926293020234233473137233715374552613650564546261UH WG Jones Forest C698
UH West Liberty C6991 N2213222643484940322932272150NV545144313216404461543553645056251UH West Liberty C699
Lynchburg Ferry C1015/A165 1268161835373527241920179432934272014217343542393040474141181Lynchburg Ferry C1015/A165
Lake Jackson C1016 1311120223645503132212120315045472733192514324944423548504236171Lake Jackson C1016
Baytown Garth C10171311418234247463630282825175740484531242714394455513450564341201Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831321023184043494234242623434938525025302418435447463553564642301Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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San Antonio
San Antonio Northwest C23219186324339603021323336445146342635232524345346463944514438272San Antonio Northwest C23
Camp Bullis C58119197324341592620283033434945352534242426326048484148534637221Camp Bullis C58
Calaveras Lake C591161611294346583022343042454946352735232322354742444044474136251Calaveras Lake C59
Fair Oaks Ranch C5021 NNANANANANANANANANANANANANANANANANANANANANANANANANANANANANV36261Fair Oaks Ranch C502
Seguin Outdoor Learning Center C5061 NNANANANANANANANANANANANANANANANANANANANANANANANANANANV474340271Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N161610294145593223342940464846362636232322364641443745484136261Heritage Middle School C622
CPS Pecan Valley C6781 N121142436395426162823334142413224NV211617344639403542473934231CPS Pecan Valley C678
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C42121018214242493621332644535038453040202321355045403752474137282Corpus Christi West C4
Corpus Christi Tuloso C211131117224144463422322743515039413141212423355244393449464035251Corpus Christi Tuloso C21
Victoria C871141316244247493122282937474838352336212314354444414047504236261Victoria C87
Aransas Pass C6591 N181419214345514327362844534838502839212218385044413660494338291Aransas Pass C659
Holly Road C6601 N6615273837453413NANANANA39263921NVNANANANANANANV3051443732241Holly Road C660
Violet C6641 NNANANANANANANANANANANV39484936363039152016324740363143423531211Violet C664
Ingleside C6851 N131417193838463523332537424336462837182118314340373350423933261Ingleside C685
Odem C6861 N11913183940443124312842454535393242182121344841363547433733261Odem C686
Taft C6871 N9712163637423120292336444635392737151816304840363141413532261Taft C687
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143115713223534422727282433374438341816192022294338252742393234261Mission C43/AP143
Brownsville C80/AGP18011081718383946271931NVNANV4140321617NANV24303939313046423734251Brownsville C80/AGP180
Harlingen Teege C10231131019233941472825312638444740372116222628314146293249453935231Harlingen Teege C1023
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P2441124141934374422233126NV384841311617172327263642292842423735241Laredo 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 - 0.059
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.