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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 2282533345495038233844463848355049363119274248525244462Ft. Worth Northwest C13/AH302
Keller C172252553342455137253441423345355049333318274150535143452Keller C17
Frisco C31/C68012628133648395243313542403242335952342320314356595241441Frisco C31/C680
Midlothian OFW C52/A13712425103344464840273640403444344838283316253845534641481Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571272883546495541283849443445356051392321334862585646471Denton Airport South C56/A163/X157
Arlington Municipal Airport C611232573343454936223439403342334446292915233945514642461Arlington Municipal Airport C61
Dallas North No.2 C63/C67912326103547415340263135363039325446322116284652544938441Dallas North No.2 C63/C679
Rockwall Heath C6912928143748465641323741352938355251342919334552504945481Rockwall Heath C69
Grapevine Fairway C70/A301/X1821262743546444939263341423247365653381919284755545144461Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X07112626133445495142302936292836344536302916314245505041441Kaufman C71/A304/X071
Granbury C73/C68112626123648485038263749514852385143343119294049525444531Granbury C73/C681
Eagle Mountain Lake C75 1262593241475136243641413947354943343218254052505246451Eagle Mountain Lake C75
Parker County C7613228183850515444274053484853455147383121324254535245511Parker County C76
Cleburne Airport C77/C68212523123445495039263942484351374536343218193748565245511Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3232613347425243263139382943345145302413294848524843473Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C4021212142142424838233235312538314640263112244348474439441Dallas Executive Airport C402
Greenville C1006/A19812827153545465242323641312740324755371319344346495542451Greenville C1006/A198
Pilot Point C103212930123446415040313848453245346353362424354457585743441Pilot Point C1032
Italy C1044/A3231242393346485135323338363544354839323414273848504644481Italy C1044/A323
Corsicana Airport C10511252493344475036342733312437344233342915243949474843451Corsicana Airport C1051
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C64422322263145516039433534232238374541241822343553504939462Longview C19/A127/C644
Tyler Airport Relocated C8212523253047546045413837292540404438402620333962606144461Tyler Airport Relocated C82
Karnack C85/AFHP30312626233745495941383434271629255543312122373446495140451Karnack C85/AFHP303
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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El Paso-Juarez
El Paso UTEP C12/A125/X15124529324536473650575553595555545429394447445149485052512El Paso UTEP C12/A125/X151
Ascarate Park SE C37/A332/A172/X1591352124NA32423248525149505050515229384042424743444350431Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 14127304533463452555451554950525426404642445352505249511Chamizal C41/AH126
Socorro Hueco C49/F31214226284437453557545450555454545034374741465351495050631Socorro Hueco C49/F312
Skyline Park C7214631334842493850525351615354545437434746495354515556521Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N3125373840414440434756555759545139394342455157525549533BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C41413925294535433249495048525052515030384638425350475150501Ivanhoe C414
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Waco
Waco Mazanec C10371232283246485138323238414454375337353514203749494748511Waco Mazanec C1037
Temple Georgia C10451212111344852513730353944485738NA34544315203750535151521Temple Georgia C1045
Killeen Skylark Field C104712524173548494837283138504959365330513717254047645851561Killeen Skylark Field C1047
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 23018212441465337292425262364715947292130253942475534512Beaumont-Downtown C2/A112/C2002
West Orange C9/A14122812192339465132282020232067514952262735213439524439472West Orange C9/A141
Port Arthur West C28/A128/A22813226192241434733302224282372595148322434263845424442491Port Arthur West C28/A128/A228
Hamshire C64/C65413822222442485235302426292272575748342327263947454940511Hamshire C64/C654
SETRPC Port Arthur C6281 N3516202342454935302323302574565344262742223846464939501SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C165413011192239444644261820282554474940222725183543424029491SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N3213232439434634302325272470585551303037133638595127481SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643134162124394347292920222220665750NANANA34243743474639471SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 13622212541465134302224242272625550322538253743514840481Nederland High School C1035
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Austin
Austin Northwest C3/A3222202182946465241263434424756364830473222223559544847492Austin Northwest C3/A322
Audubon C38121221430465051382631364747NANA4930463523223467615446511Audubon C38
Fayette County C6012 N1919232645555745283236254957324537452725233547544747532Fayette County C601
Dripping Springs School C6141 NNANANANA41475434263236465055374628413526253551625345491Dripping Springs School C614
CAPCOG McKinney Roughs C6841 N2020192948536041273339465362425131483025203950515253581CAPCOG McKinney Roughs C684
CAPCOG Lake Georgetown C6901 N20211831454952NA263034454656335131513720223953615748511CAPCOG Lake Georgetown C690
Gorzycki Middle School C16031 N2224193047485742273438475359415134483630263655565054591Gorzycki Middle School C1603
Lockhart C16041 N1919142746516038243437465064454228422726214052494447591Lockhart C1604
CAPCOG San Marcos Staples Road C16751 N1922172948536540303737485260465235473323263550525348521CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162331122253746462822NA2024175742583944213594153585331502Houston East C1/G316
Houston Aldine C8/AF108/X150 22213242844505336312830252555446247512844144150686239552Houston Aldine C8/AF108/X150
Channelview C15/AH115 33718212141455132232628262258385646322734114148504529513Channelview C15/AH115
Northwest Harris Co. C26/A110/X15421815232541494337272931263045345432383133173745565937522Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391371720217567472925222522195458543833283574146474533491Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C4513711202140474734322326202267395855272331195049524535541Seabrook Friendship Park C45
Houston Bayland Park C53/A146 133919223242492823232522124249563435222783556494235481Houston Bayland Park C53/A146
Conroe Relocated C78/A32112414283245504944333032262744335235423349203944808338521Conroe Relocated C78/A321
Manvel Croix Park C8413910232542445139332527233054746034382633104365544539531Manvel Croix Park C84
Clinton C403/C304/AH113 33012191939444427202427221347405031362025103850453733403Clinton C403/C304/AH113
Houston North Wayside C40513011182137434631212325211543345331342235123444514830411Houston North Wayside C405
Houston Monroe C4061321020193437393225212320214959493234202763746423730441Houston Monroe C406
Lang C40822311212236444237232525232546464936412932113653605335492Lang C408
Houston Croquet C409234112224374245302923242227505159353925331039615246NA502Houston Croquet C409
Houston Westhollow C41012910202036434338242524222743455635412933143856525242521Houston Westhollow C410
Houston Texas Avenue C411128714173640462724222420154441473035162983447504330411Houston Texas Avenue C411
Park Place C416137723243741452726202218225348573739253363852544632481Park Place C416
Sheldon C5511 N3016212140454734222527232151325340422728133745514633491Sheldon C551
Baytown Wetlands Center C5521 N271215162529322321182018154934353324192292831343424321Baytown Wetlands Center C552
Crosby Library C5531 N2712182040444931222226201950325542463028103538585231511Crosby Library C553
West Houston C5541 N1810192036454138222425232543364929382431133647504837481West Houston C554
La Porte Sylvan Beach C5561 N381018144144503628242622204337454226192694343454134541La Porte Sylvan Beach C556
Mercer Arboretum C5571 N1612202537444432242327202042355039411943133242656133461Mercer Arboretum C557
Tom Bass C5581 N32719203638422927192218224559503133222673651464333441Tom Bass C558
Katy Park C5591 N1111161734464435172225192642294821322426123343455038461Katy Park C559
Atascocita C5601 N181219243541433123212418174130503437831133239565430451Atascocita C560
Meyer Park C5611 N1812232539464135252928242741355335392636143438NANANANA1Meyer Park C561
Bunker Hill Village C5621 N2513202135424235222325212442445034362635103454514435441Bunker Hill Village C562
Huffman Wolf Road C5631 N1513192246495035282729241850285446553533113142746034541Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N2914232341484832292528252060486151572640114554555235531HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N4318232646515141332831282482486360473332164547595737591Wallisville Road C617
Danciger C618 1 N3414232341465444322927233952485732382427143864514443551Danciger C618
Mustang Bayou C619 1 N3631212242474938372325223257516245362426214560464838551Mustang Bayou C619
Texas City 34th St. C620 1 N4221202245494843382429273858466152302325235953464839561Texas City 34th St. C620
UH Moody Tower C6951 N408232542454929282527222654466046422536104153585136521UH Moody Tower C695
U of H-Sugarland C6961 N3411222036434735302325222744435131332325113553444837451U of H-Sugarland C696
UH Coastal Center C6971 N3317161936394036261722192345344635241620173845373831431UH Coastal Center C697
UH WG Jones Forest C6981 N2113252944494941323132262645355234423350174049697839521UH WG Jones Forest C698
UH West Liberty C6991 N3416263046505443353134292762386260674141194247716237581UH West Liberty C699
Lynchburg Ferry C1015/A165 13410222137394131282226241656355444332033103840504534471Lynchburg Ferry C1015/A165
Lake Jackson C1016 13717222340505238362423223853525930392228153556464440521Lake Jackson C1016
Baytown Garth C101714318222644495039342831272382476260483332164346585835571Baytown Garth C1017
Galveston 99th St. C1034/A320/X18314114242141455150382628264356446256363529255259494943561Galveston 99th St. C1034/A320/X183
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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San Antonio
San Antonio Northwest C2321920132545416535253634374755493933402629283860494844492San Antonio Northwest C23
Camp Bullis C5812021132546436730283131354653474233402827293971525245531Camp Bullis C58
Calaveras Lake C5911717172344496236293832465154484131392625243851444743471Calaveras Lake C59
Heritage Middle School C6221 N1717142243496639303931445154494130392725253949424742501Heritage Middle School C622
CPS Pecan Valley C6781 N141491937436130213326364545443728362318203952434538461CPS Pecan Valley C678
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C421513182246465446223728506256414935452224263853464344562Corpus Christi West C4
Corpus Christi Tuloso C2111413172645465041263529495556464530472325293959454143521Corpus Christi Tuloso C21
Victoria C8711815202245495239293132415152414133442525183847464442501Victoria C87
Aransas Pass C6591 N2517212246465448314131496255415629462224214160454244681Aransas Pass C659
Holly Road C6601 N881627404150411718NANANA4429432337NANANANANANA3740601Holly Road C660
Violet C6641 NNANANANANANANANANANA26455462433829441721203756423941461Violet C664
Ingleside C6851 N2216201942404942273628425251394928442022223449423940551Ingleside C685
Odem C6861 N1411122043424837293429474950414128482023273953423942511Odem C686
Taft C6871 N129111539394635223425435355404127431919243453413838441Taft C687
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP1431209162737364536353127364351443924182122273450423032471Mission C43/AP143
Brownsville C80/AGP18011210202139424831243329NA564350432319NA24253445413736521Brownsville C80/AGP180
Harlingen Teege C102311512242740444930313329415554444129202329303346503539531Harlingen Teege C1023
AreaMonitoring SitePOCMarch 2015POCMonitoring Site
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Laredo
Laredo Vidaurri C44/AFGP144/P2441166192738404728294028434753443323222019343141453631451Laredo 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.