Skip to main content

Daily Maximum Eight-Hour Ozone Averages for January 2019

The table below lists the peak daily maximum eight-hour ozone concentrations measured in January 2019 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 SitePOCJanuary 2019POCMonitoring Site
Dallas-Fort Worth
Ft. Worth Northwest C13/AH302 215111932313734302720232424189NA2Ft. Worth Northwest C13/AH302
Keller C172171418333840363536222324242111NA2Keller C17
Frisco C31/C6801161415313541353838252523262413NA1Frisco C31/C680
Midlothian OFW C52/A1371151219333840353431253126252019NA1Midlothian OFW C52/A137
Denton Airport South C56/A163/X1571161217332840393534202123242311NA1Denton Airport South C56/A163/X157
Arlington Municipal Airport C611151117303439363228262826262216NA1Arlington Municipal Airport C61
Dallas North No.2 C63/C6791151116303440343535232424262212NA1Dallas North No.2 C63/C679
Rockwall Heath C691151114293339314039282723262618NA1Rockwall Heath C69
Grapevine Fairway C70/A301/X1821161320322838383635202223252311NA1Grapevine Fairway C70/A301/X182
Kaufman C71/A304/X0711151216303840323937293424272821NA1Kaufman C71/A304/X071
Granbury C73/C6811161421353239403628272628282416NA1Granbury C73/C681
Eagle Mountain Lake C75 1161420394141413736262727262315NA1Eagle Mountain Lake C75
Parker County C761191522384440413936312729292618NA1Parker County C76
Cleburne Airport C77/C6821161322383943393532313129282315NA1Cleburne Airport C77/C682
Dallas Hinton St. C401/C60/AH161 3161216292540303637182026272313NA3Dallas Hinton St. C401/C60/AH161
Dallas Executive Airport C402116NANV303839373735253125272217NA1Dallas Executive Airport C402
Greenville C1006/A1981151013313842363836272424272618NA1Greenville C1006/A198
Pilot Point C10321181618353241383836232623262511NA1Pilot Point C1032
Italy C1044/A3231151319363836313837293326292421NA1Italy C1044/A323
Corsicana Airport C1051115111834393827343528322328NV21NA1Corsicana Airport C1051
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Longview C19/A127/C644226171630384029383829NANANANV21NA2Longview C19/A127/C644
Tyler Airport Relocated C821191718344742314142303430302924NA1Tyler Airport Relocated C82
Karnack C85/AFHP3031231622233338263537332324262526NA1Karnack C85/AFHP303
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
El Paso-Juarez
El Paso UTEP C12/A125/X151/G1252292133342225342932243637403431NA2El Paso UTEP C12/A125/X151/G125
Ascarate Park SE C37/A332/A172/X1591NVNANV26262127273121313336NVNVNA1Ascarate Park SE C37/A332/A172/X159
Chamizal C41/AH126 1292233292325372329263833383330NA1Chamizal C41/AH126
Socorro Hueco C49/F3121262230312924333134253534393131NA1Socorro Hueco C49/F312
Skyline Park C721312537303239413035324140393435NA1Skyline Park C72
BRAVO Big Bend C67/C316/C656/C6913 N39NV36373640374035283139332719NA3BRAVO Big Bend C67/C316/C656/C691
Ivanhoe C414/F5141262031293325332832283836373133NA1Ivanhoe C414/F514
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Waco Mazanec C10371151117343634283535303325282220NA1Waco Mazanec C1037
Temple Georgia C10451151221323535283333323524282321NA1Temple Georgia C1045
Killeen Skylark Field C10471171322364243313537373226312117NA1Killeen Skylark Field C1047
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Beaumont-Port Arthur
Beaumont-Downtown C2/A112/C2002 2272119294144344134343935302617NA2Beaumont-Downtown C2/A112/C2002
West Orange C9/A1412272728284643414136334334302621NA2West Orange C9/A141
Port Arthur West C28/A128/A2281272428304242383435363935302619NA1Port Arthur West C28/A128/A228
Hamshire C64/C6541272928314243393935374737292820NA1Hamshire C64/C654
SETRPC Port Arthur C6281 N27273030424637NV36364336312723NA1SETRPC Port Arthur C628
SETRPC 40 Sabine Pass C640/C16541272831324246412635384237312721NA1SETRPC 40 Sabine Pass C640/C1654
SETRPC Mauriceville 42 C642/C311/C6651 N2727262944463941NV374136302624NA1SETRPC Mauriceville 42 C642/C311/C665
SETRPC 43 Jefferson Co Airport C6431292931324646413937404439332819NA1SETRPC 43 Jefferson Co Airport C643
Nederland High School C1035 1262324294042383533354233302516NA1Nederland High School C1035
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Austin Northwest C3/A3222151023323534283234322827282019NA2Austin Northwest C3/A322
Audubon C381151023324038253435292727292119NA1Audubon C38
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Houston East C1/G316225231424373626272627382825217NA2Houston East C1/G316
Houston Aldine C8/AF108/X150 2262517304238303734344830312816NA2Houston Aldine C8/AF108/X150
Channelview C15/AH115 3282621283230333032284031302512NA3Channelview C15/AH115
Northwest Harris Co. C26/A110/X1542NANV16324539332735324329302815NA2Northwest Harris Co. C26/A110/X154
Hou.DeerPrk2 C35/235/1001/AFH139FP2391292821254239353332364632282418NA1Hou.DeerPrk2 C35/235/1001/AFH139FP239
Seabrook Friendship Park C451252722253435342231394432262523NA1Seabrook Friendship Park C45
Houston Bayland Park C53/A146 1231710254029262929293725272413NA1Houston Bayland Park C53/A146
Conroe Relocated C78/A3211332619334543323436395130313024NA1Conroe Relocated C78/A321
Manvel Croix Park C84131NVNV304638333532364633302419NA1Manvel Croix Park C84
Clinton C403/C304/AH113 3272214213936272233293925282111NA3Clinton C403/C304/AH113
Houston North Wayside C405123221621303119222925NVNANANANANA1Houston North Wayside C405
Houston Monroe C4061222216233530282824283727221713NA1Houston Monroe C406
Lang C4082231911253733272827253826272311NA2Lang C408
Houston Croquet C4092262314284437303330324230272214NA2Houston Croquet C409
Houston Westhollow C4101291814304537313133324432302714NA1Houston Westhollow C410
Park Place C416124231523433529292832423026NV12NA1Park Place C416
Baytown Wetlands Center C5521 N242017202824202129303922252412NA1Baytown Wetlands Center C552
Crosby Library C5531 N232119253631263029314026252518NA1Crosby Library C553
Katy Park C5591 N2181021312721202520362220199NA1Katy Park C559
Atascocita C5601 N192015202829202326263522211916NA1Atascocita C560
Meyer Park C5611 N1811818252319162119261717189NA1Meyer Park C561
Huffman Wolf Road C5631 N141413161920171818192416151412NA1Huffman Wolf Road C563
HRM-3 Haden Road C603/A114 1 N27251825363330323223442929269NA1HRM-3 Haden Road C603/A114
Wallisville Road C617 1 N323228324140323537334834323122NA1Wallisville Road C617
Danciger C618 1 N372316324939373639434632322823NA1Danciger C618
Texas City 34th St. C620 1 N313433304542383838404836323426NA1Texas City 34th St. C620
UH Moody Tower C6951 N30231630494135NV343646343125NVNA1UH Moody Tower C695
UH WG Jones Forest C6981 N312417334841323536354930303017NA1UH WG Jones Forest C698
UH West Liberty C6991 N272623314339343734374630292722NA1UH West Liberty C699
Lynchburg Ferry C1015/A165 1252518202529351829314325262616NA1Lynchburg Ferry C1015/A165
Lake Jackson C1016 1333022324538373438414431312326NA1Lake Jackson C1016
Baytown Garth C10171302926293940313436374833302921NA1Baytown Garth C1017
Galveston 99th St. C1034/A320/X1831273131304638383235414936313232NA1Galveston 99th St. C1034/A320/X183
Oyster Creek C1607 1 N393630405649NV3539435035332930NA1Oyster Creek C1607
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
San Antonio
San Antonio Northwest C232181327364541353134392831291713NA2San Antonio Northwest C23
Camp Bullis C58 1191428404241343336362931291711NA1Camp Bullis C58
Calaveras Lake C591191126354239333037453234321930NA1Calaveras Lake C59
Heritage Middle School C6221 N12421324132262229372526231121NA1Heritage Middle School C622
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Corpus Christi-Victoria
Corpus Christi West C422592137463834324445NV34322032NA2Corpus Christi West C4
Corpus Christi Tuloso C2111992036403430NANV383930291925NA1Corpus Christi Tuloso C21
Victoria C871181120324136283333404031282223NA1Victoria C87
Violet C6641 N221023414338333340434232NVNV27NA1Violet C664
Ingleside C6851 N251120384538343442454533322334NA1Ingleside C685
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Lower Rio Grande Valley
Mission C43/AP1431261124343635302837373035312614NA1Mission C43/AP143
Harlingen Teege C1023135102238484036323942403635NVNANA1Harlingen Teege C1023
AreaMonitoring SitePOCJanuary 2019POCMonitoring Site
Laredo Vidaurri C44/AFGP144/P244119929343637282327383233352315NA1Laredo 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.