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Peak Daily One-Hour Ozone Averages for May 2022

The table below lists the peak daily one-hour ozone concentrations measured in May 2022 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 SitePOCMay 2022POCMonitoring Site
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Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 260463639407145514956535862645393576359584737482Ft. Worth Northwest C13/AH302
Keller C17257434137377043474454595860604975515852524431482Keller C17
Frisco C31/C680160524140358845464549506164695854645853555129431Frisco C31/C680
Denton Airport South C56/A163/X157167483939389057524948526167785761606561604831411Denton Airport South C56/A163/X157
Arlington Municipal Airport C61158434235426043474550626061535390515953544737451Arlington Municipal Airport C61
Dallas North No.2 C63/C679158434137377244444348466058655262575250535231431Dallas North No.2 C63/C679
Rockwall Heath C69154434433336537384737364549534545534546484127371Rockwall Heath C69
Grapevine Fairway C70/A301/X182164454136397447494746485363685369536056584831481Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X071160334240386242415441435258555767645854595229511Kaufman C71/A304/X071
Granbury C73/C681160343440446249525145455764555373606165624742451Granbury C73/C681
Eagle Mountain Lake C75 163473740377747504957516062705268566260594332481Eagle Mountain Lake C75
Parker County C76162384139456848505047465662585293615964604538421Parker County C76
Cleburne Airport C77/C682161382740426152514956505568605477546659595554511Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 350403831345836393740384654545064494843474732413Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402157414436416347464555486363555688595552565244471Dallas Executive Airport C402
Greenville C1006/A198158454130385840404934374452624844545147504125421Greenville C1006/A198
Pilot Point C1032164504341357152535348556571756158636562604530361Pilot Point C1032
Italy C1044/A323154322537425644424252565554545572535251534851461Italy C1044/A323
Corsicana Airport C1051156352644386746445461546456615970575953615531481Corsicana Airport C1051
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Tyler-Longview-Marshall
Longview C19/A127/C644262374728375447423438445247404458496155563028312Longview C19/A127/C644
Tyler Airport Relocated C82164534842505842504841454957615459726774745423621Tyler Airport Relocated C82
Karnack C85/AFHP303156374832324650383938535756485357564948473334281Karnack C85/AFHP303
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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El Paso-Juarez
Ascarate Park SE C37/A332/A172/X159153484352534952535148464854586761424545434546591Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 159544853575558575045465957607271485049515046641Chamizal C41/AH126
Socorro Hueco C49/F312159565251605960595251465362797483545752525549601Socorro Hueco C49/F312
Skyline Park C72163625561616567585546525555627771564144473833481Skyline Park C72
Ivanhoe C414/F514153494650535050504750424555606579454746435043571Ivanhoe C414/F514
Ojo De Agua C1021/FG121/FG221161545153585459584847555258628467495150525456471Ojo De Agua C1021/FG121/FG221
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Waco
Waco Mazanec C103714831283637NA47414155505053514660515048524948471Waco Mazanec C1037
Temple Georgia C1045141334237395253434140465058524953465349505150511Temple Georgia C1045
Killeen Skylark Field C1047145334339425957464941435668555658565862565151531Killeen Skylark Field C1047
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 223322424377620262839457145404557453836332241292Beaumont-Downtown C2/A112/C2002
West Orange C9/A141231312724427933282647507056495360564542352345332West Orange C9/A141
Port Arthur West C28/A128/A228127362725424625312745506144434347474038352455421Port Arthur West C28/A128/A228
Hamshire C64/C654126342725394925222633485547454868464142342346421Hamshire C64/C654
SETRPC Port Arthur C6281 N324032285050253029455462494749NANANANANANANANA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C1654133423228494227312746536247454648413938382666511SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N374131274874313527405682695855NANANANANANANANA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C643127362724436022272745486445434452493939352353391SETRPC 43 Jefferson Co Airport C643
Nederland 17th Street C10351NANANANANANANANANANANA5847464757534243392550391Nederland 17th Street C1035
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Austin
Austin North Hills Drive C3/A322252343836306657454340444856645254535755554953572Austin North Hills Drive C3/A322
Audubon C38151293735316154413835414856575253525456554748511Audubon C38
Dripping Springs School C6141 N42344037377563484837445560635763555661574959541Dripping Springs School C614
CAPCOG Lake Georgetown C6901 N57344841406765514941516070696169636262615653591CAPCOG Lake Georgetown C690
Lockhart C16041 N35343833306054454338445452585659566259616063631Lockhart C1604
CAPCOG Bastrop CAMS16121 N36354033365759474540455854615758515556595249631CAPCOG Bastrop CAMS1612
CAPCOG Elgin C16131 N36303934345454474441445851585560535455555149571CAPCOG Elgin C1613
CAPCOG East Austin C16191 N49374139336860474540475752635556566156585155591CAPCOG East Austin C1619
CAPCOG Round Rock Brushy Creek W C16201 N39324235355755434436425158605354525653554950531CAPCOG Round Rock Brushy Creek W C1620
CAPCOG San Marcos Staples Road C16751 N39384137397964494636445152575759565861625258611CAPCOG San Marcos Staples Road C1675
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Houston-Galveston-Brazoria
Houston East C1/G3162363828263280403232365470554951925852NA432748452Houston East C1/G316
Houston Aldine C8/AF108/X150 2NA342727377543323746558059545388625150412949382Houston Aldine C8/AF108/X150
Channelview C15/AH115 328362925348639322629435551495279654745392544323Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542414238313811648394462837753585267634954523849522Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP239128352725355234313033506046444574484242392349491Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C45123302520263623252429414837384144363535331946401Seabrook Friendship Park C45
Houston Bayland Park C53/A146 131392926366140313135515545495370494547473061711Houston Bayland Park C53/A146
Conroe Relocated C78/A321145495143469363506254628874705758886964574747371Conroe Relocated C78/A321
Manvel Croix Park C84125342525324032282729445043424348474546422564721Manvel Croix Park C84
Clinton C403/C304/AH113 333352724386238362838426044454694504650493552513Clinton C403/C304/AH113
Houston North Wayside C405/C1033135342623349537282936506852484677564644362442351Houston North Wayside C405/C1033
Houston Monroe C4061NANANANANANANANANANANANA43373962444241332551601Houston Monroe C406
Lang C4082333729253011041303138596248515485514444433051482Lang C408
Houston Croquet C409228382626344938313032454942454861464245432851682Houston Croquet C409
Houston Westhollow C410/C3003128342723357038272836424946444156454543392753681Houston Westhollow C410/C3003
Park Place C416130362724364936322933546249424366484545372749551Park Place C416
Houston Harvard Street C417135392926347840343241617348505398564849443156521Houston Harvard Street C417
Sheldon C5511 N26332523357536282528415451504975674742372441201Sheldon C551
Baytown Wetlands Center C5521 N25322921374924262430375042394280473637322145461Baytown Wetlands Center C552
Crosby Library C5531 N27372826367137282929415559505777734946382340291Crosby Library C553
West Houston C5541 N364032263512140353345566455525068565450453255681West Houston C554
La Porte Sylvan Beach C5561 N24322922304223242331375037374254413534311946451La Porte Sylvan Beach C556
Mercer Arboretum C5571 N47413832357752374752639465616279725554463344361Mercer Arboretum C557
Tom Bass C5581 N24332623334332292528434842414158474343362454671Tom Bass C558
Katy Park C5591 N313526284010236293738455041424352424243413144681Katy Park C559
Atascocita C5601 N34353128317144333437436058524772685248383037271Atascocita C560
Meyer Park C5611 N42352925308847313555688955554578555145442841381Meyer Park C561
Bunker Hill Village C5621 N26352522288039252732474842454568424024NANANANA1Bunker Hill Village C562
Huffman Wolf Road C5631 N31413329395749323332435968576066795752402941281Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N32352725345938273134486751475090554975362048NA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N30393226446132322933445752475680624443392649NA1Wallisville Road C617
Texas City 34th St. C620 1 N34413228444332373242556049485148464746422761NA1Texas City 34th St. C620
UH Moody Tower C6951 N29332623335133312735526346424492494444382548531UH Moody Tower C695
UH WG Jones Forest C6981 N48484842419762476262629873695563816858574548411UH WG Jones Forest C698
Lynchburg Ferry C1015/A165 124373127386232322932465751484969564343382441361Lynchburg Ferry C1015/A165
Lake Jackson C1016 132352626313432342737474839424642414345392869531Lake Jackson C1016
Baytown Garth C1017135443530486938383438496158536286675049463253441Baytown Garth C1017
Galveston 99th St. C1034/A320/X183134403225354030332744485445454642414242382740571Galveston 99th St. C1034/A320/X183
UH Smith Point C16061 N31393125485028312739465746445346464143382453531UH Smith Point C1606
Oyster Creek C1607 1 N354031283238363630415053464750NANANANANANANANA1Oyster Creek C1607
UH Launch Trailer C16111 N32372824345637343036566551464997534947422751551UH Launch Trailer C1611
Liberty Sam Houston Library C16261 N334230223931NA2224284552514867664142NA392011NA1Liberty Sam Houston Library C1626
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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San Antonio
San Antonio Northwest C23237354339395656464738454950615359515356575860572San Antonio Northwest C23
Camp Bullis C58 137314340396460485339495757685963565860595862571Camp Bullis C58
Calaveras Lake C59131273330355249394129374541484447464448504654NA1Calaveras Lake C59
Elm Creek Elementary C5011 NNANANANANANANANANANANANANANANANANANA55585460601Elm Creek Elementary C501
Fair Oaks Ranch C5021 N33303736355555434636445153585357515053505151481Fair Oaks Ranch C502
Bulverde Elementary C5031 N29263431305453414330364855615454495255544755431Bulverde Elementary C503
New Braunfels Airport C5041 N28263129295650413928344041444245404144474043431New Braunfels Airport C504
City of Garden Ridge C5051 N30273230325748413828364348534550484649494651481City of Garden Ridge C505
Seguin Outdoor Learning Center C5061 N25222725244544353426333738404041414144453843391Seguin Outdoor Learning Center C506
Heritage Middle School C6221 N32303533365349414230394743464549474448484551511Heritage Middle School C622
CPS Pecan Valley C6781 N22172423243532262821263230373035333437393741401CPS Pecan Valley C678
Government Canyon C16101 N30233530284545343429354040474447444445453950441Government Canyon C1610
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Corpus Christi-Victoria
Corpus Christi West C4229272425253331243022373938424039373942443256522Corpus Christi West C4
Corpus Christi Tuloso C211NANA2224243332253123383938413938363842453155501Corpus Christi Tuloso C21
Victoria C87126272424193538273127374240454241383943413461541Victoria C87
AreaMonitoring SitePOCMay 2022POCMonitoring Site
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Lower Rio Grande Valley
Mission C43/AP143132283130403944353830373843454141404046514652501Mission C43/AP143
Harlingen Teege C1023127252829293535343426323841454040403944484448451Harlingen Teege C1023
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.