Eight-Hour Ozone High Value Days for 2024
as of July 26
The table below lists the daily maximum eight-hour ozone concentrations measured which meet or exceed 71 parts per billion in 2024 in each community where the TCEQ measures ozone. This information is updated hourly. Concentrations are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) Times shown are in 24-hour format and are Local Standard Time. Our convention is that the time reflects the beginning of the eight-hour average. All ozone measurements are in parts per billion.Use the selection boxes below to customize this report. You may select a different year, a different sorting order, or a different report format. Click on the Generate Report button once you have made your selections.
| 2024 Sorted by Maximum Value | |||||||
|---|---|---|---|---|---|---|---|
| Location | Region | CAMS | AQS | Date | Time | Value | POC |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | May 26 2024 | 13:00 | 122 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | June 7 2024 | 09:00 | 109 | 1 N |
| West Houston C554 | 12 | 554 | 48_201_0554 | June 7 2024 | 09:00 | 108 | 1 N |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 7 2024 | 09:00 | 106 | 1 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | May 28 2024 | 06:00 | 103 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | May 15 2024 | 10:00 | 103 | 1 N |
| Katy Park C559 | 12 | 559 | 48_201_0559 | June 7 2024 | 10:00 | 102 | 1 N |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 7 2024 | 10:00 | 100 | 1 |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | May 18 2024 | 11:00 | 100 | 1 N |
| Houston Westhollow C410/C3003 | 12 | 410 | 48_201_0066 | June 7 2024 | 10:00 | 99 | 1 |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | June 7 2024 | 10:00 | 99 | 1 N |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | May 15 2024 | 11:00 | 98 | 2 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | May 15 2024 | 09:00 | 98 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | May 15 2024 | 11:00 | 96 | 2 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 14 2024 | 10:00 | 95 | 1 |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | May 15 2024 | 09:00 | 95 | 1 N |
| Seabrook Friendship Park C45 | 12 | 45 | 48_201_1050 | July 9 2024 | 11:00 | 95 | 1 |
| Houston North Wayside C405/C1033 | 12 | 405 | 48_201_0046 | May 15 2024 | 11:00 | 94 | 1 |
| Atascocita C560 | 12 | 560 | 48_201_0560 | May 18 2024 | 10:00 | 94 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 6 2024 | 11:00 | 93 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 14 2024 | 12:00 | 92 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 15 2024 | 10:00 | 92 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | June 6 2024 | 11:00 | 92 | 2 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | June 6 2024 | 10:00 | 91 | 1 |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | May 18 2024 | 11:00 | 91 | 2 |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | May 15 2024 | 10:00 | 91 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | June 7 2024 | 10:00 | 91 | 3 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | May 15 2024 | 10:00 | 90 | 1 N |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 14 2024 | 10:00 | 90 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | July 19 2024 | 13:00 | 89 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | June 6 2024 | 11:00 | 89 | 2 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | July 11 2024 | 11:00 | 88 | 1 |
| Lang C408 | 12 | 408 | 48_201_0047 | June 7 2024 | 09:00 | 87 | 2 |
| CAPCOG Round Rock Brushy Creek W C1620 | 11 | 1620 | 48_491_1620 | May 8 2024 | 12:00 | 87 | 1 N |
| Heritage Middle School C622 | 13 | 622 | 48_029_0622 | May 14 2024 | 11:00 | 86 | 1 N |
| Atascocita C560 | 12 | 560 | 48_201_0560 | May 15 2024 | 10:00 | 86 | 1 N |
| Lynchburg Ferry C1015/A165 | 12 | 1015 | 48_201_1015 | May 15 2024 | 10:00 | 86 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | July 24 2024 | 10:00 | 85 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | May 15 2024 | 08:00 | 85 | 1 |
| Tom Bass C558 | 12 | 558 | 48_201_0558 | June 6 2024 | 09:00 | 85 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | June 14 2024 | 10:00 | 85 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 27 2024 | 11:00 | 85 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 6 2024 | 10:00 | 84 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 11 2024 | 11:00 | 84 | 1 |
| Ascarate Park SE C37/A332/A172/X159 | 6 | 37 | 48_141_0055 | July 24 2024 | 11:00 | 84 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 24 2024 | 11:00 | 84 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | June 7 2024 | 10:00 | 83 | 1 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | June 7 2024 | 09:00 | 83 | 1 N |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 7 2024 | 10:00 | 83 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 13 2024 | 11:00 | 83 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | July 25 2024 | 10:00 | 83 | 1 |
| Lang C408 | 12 | 408 | 48_201_0047 | May 15 2024 | 10:00 | 83 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 6 2024 | 09:00 | 83 | 1 |
| Houston Westhollow C410/C3003 | 12 | 410 | 48_201_0066 | June 14 2024 | 10:00 | 83 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | June 7 2024 | 10:00 | 83 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | June 14 2024 | 11:00 | 83 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | July 20 2024 | 12:00 | 83 | 1 |
| Huffman Wolf Road C563 | 12 | 563 | 48_201_0563 | May 15 2024 | 09:00 | 83 | 1 N |
| Nederland 17th Street C1035 | 10 | 1035 | 48_245_1035 | May 15 2024 | 10:00 | 83 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | July 24 2024 | 10:00 | 82 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 25 2024 | 10:00 | 82 | 1 |
| Channelview C15/AH115 | 12 | 15 | 48_201_0026 | May 15 2024 | 10:00 | 82 | 3 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | June 7 2024 | 10:00 | 82 | 2 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | June 14 2024 | 10:00 | 82 | 2 |
| Park Place C416 | 12 | 416 | 48_201_0416 | July 20 2024 | 12:00 | 82 | 1 |
| Crosby Library C553 | 12 | 553 | 48_201_0553 | May 15 2024 | 08:00 | 82 | 1 N |
| West Houston C554 | 12 | 554 | 48_201_0554 | June 14 2024 | 10:00 | 82 | 1 N |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | June 7 2024 | 10:00 | 82 | 2 |
| SETRPC Port Arthur C628 | 10 | 628 | 48_245_0628 | May 15 2024 | 10:00 | 82 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 14 2024 | 12:00 | 82 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 14 2024 | 11:00 | 82 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | July 10 2024 | 11:00 | 82 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | June 14 2024 | 11:00 | 81 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | July 24 2024 | 11:00 | 81 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | June 14 2024 | 13:00 | 81 | 1 N |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | July 18 2024 | 16:00 | 81 | 1 N |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | July 20 2024 | 11:00 | 81 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 13 2024 | 11:00 | 81 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | June 13 2024 | 10:00 | 81 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | June 13 2024 | 08:00 | 81 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | June 14 2024 | 11:00 | 81 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | May 15 2024 | 11:00 | 81 | 3 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | May 15 2024 | 10:00 | 81 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | June 7 2024 | 09:00 | 80 | 1 N |
| Oyster Creek C1607 | 12 | 1607 | 48_039_1607 | June 6 2024 | 10:00 | 80 | 1 N |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | July 11 2024 | 10:00 | 80 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | June 6 2024 | 09:00 | 80 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | June 12 2024 | 09:00 | 80 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | May 15 2024 | 11:00 | 80 | 1 |
| Waco Mazanec C1037 | 9 | 1037 | 48_309_1037 | July 10 2024 | 11:00 | 80 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 11 2024 | 11:00 | 80 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | July 11 2024 | 10:00 | 80 | 1 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | June 7 2024 | 09:00 | 79 | 2 |
| Government Canyon C1610 | 13 | 1610 | 48_029_1610 | May 9 2024 | 11:00 | 79 | 1 N |
| Lake Jackson C1016 | 12 | 1016 | 48_039_1016 | June 6 2024 | 10:00 | 79 | 1 |
| AACOG City of Garden Ridge C505 | 13 | 505 | 48_091_0505 | June 7 2024 | 09:00 | 79 | 1 N |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | May 31 2024 | 11:00 | 79 | 3 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | June 14 2024 | 11:00 | 79 | 3 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 11 2024 | 14:00 | 79 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 20 2024 | 11:00 | 79 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | June 15 2024 | 11:00 | 79 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | July 25 2024 | 11:00 | 79 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | May 14 2024 | 11:00 | 79 | 1 N |
| Longview C19/A127/C644 | 5 | 19 | 48_183_0001 | June 14 2024 | 10:00 | 79 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | June 14 2024 | 11:00 | 79 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 13 2024 | 10:00 | 79 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 14 2024 | 11:00 | 79 | 1 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | May 27 2024 | 10:00 | 79 | 2 |
| Beaumont-Downtown C2/A112/C2002 | 10 | 2 | 48_245_0009 | May 15 2024 | 10:00 | 79 | 2 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | June 8 2024 | 10:00 | 79 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | June 14 2024 | 12:00 | 79 | 2 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | June 6 2024 | 10:00 | 79 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | July 19 2024 | 11:00 | 79 | 1 |
| Laredo College C44 | 16 | 44 | 48_479_0016 | May 18 2024 | 10:00 | 79 | 1 N |
| Heritage Middle School C622 | 13 | 622 | 48_029_0622 | June 7 2024 | 10:00 | 78 | 1 N |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | May 31 2024 | 11:00 | 78 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | July 11 2024 | 11:00 | 78 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 12 2024 | 11:00 | 78 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | July 18 2024 | 13:00 | 78 | 1 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | June 6 2024 | 10:00 | 78 | 2 |
| Houston Westhollow C410/C3003 | 12 | 410 | 48_201_0066 | June 13 2024 | 10:00 | 78 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | May 27 2024 | 11:00 | 78 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | May 15 2024 | 10:00 | 78 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | May 27 2024 | 11:00 | 78 | 3 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | June 7 2024 | 11:00 | 78 | 1 N |
| Hamshire C64/C654 | 10 | 64 | 48_245_0022 | June 7 2024 | 11:00 | 78 | 1 |
| Nederland 17th Street C1035 | 10 | 1035 | 48_245_1035 | June 7 2024 | 10:00 | 78 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 18 2024 | 13:00 | 78 | 1 |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | July 9 2024 | 12:00 | 78 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 11 2024 | 11:00 | 78 | 2 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | June 6 2024 | 12:00 | 77 | 1 N |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | June 10 2024 | 12:00 | 77 | 1 N |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | June 14 2024 | 10:00 | 77 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | June 6 2024 | 10:00 | 77 | 3 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | July 11 2024 | 11:00 | 77 | 3 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 12 2024 | 10:00 | 77 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | June 12 2024 | 08:00 | 77 | 1 |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | May 15 2024 | 11:00 | 77 | 1 N |
| SETRPC 43 Jefferson Co Airport C643 | 10 | 643 | 48_245_0102 | June 7 2024 | 11:00 | 77 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | July 19 2024 | 11:00 | 77 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 12 2024 | 11:00 | 77 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | July 11 2024 | 11:00 | 76 | 1 N |
| Government Canyon C1610 | 13 | 1610 | 48_029_1610 | May 14 2024 | 12:00 | 76 | 1 N |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | June 14 2024 | 11:00 | 76 | 1 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | July 10 2024 | 10:00 | 76 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 13 2024 | 12:00 | 76 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | May 15 2024 | 10:00 | 76 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 15 2024 | 09:00 | 76 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | April 4 2024 | 11:00 | 76 | 1 N |
| Seguin Outdoor Learning Center C506 | 13 | 506 | 48_187_0506 | June 7 2024 | 09:00 | 76 | 1 N |
| Park Place C416 | 12 | 416 | 48_201_0416 | June 6 2024 | 10:00 | 76 | 1 |
| Sheldon C551 | 12 | 551 | 48_201_0551 | May 15 2024 | 10:00 | 76 | 1 N |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | July 1 2024 | 10:00 | 76 | 2 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | May 15 2024 | 09:00 | 76 | 1 N |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | July 24 2024 | 12:00 | 76 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | June 5 2024 | 12:00 | 76 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | July 24 2024 | 11:00 | 76 | 1 |
| West Orange C9/A141 | 10 | 9 | 48_361_1001 | May 15 2024 | 12:00 | 76 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 6 2024 | 10:00 | 76 | 1 |
| Calaveras Lake C59 | 13 | 59 | 48_029_0059 | May 14 2024 | 11:00 | 75 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | June 13 2024 | 11:00 | 75 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | July 10 2024 | 10:00 | 75 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | July 10 2024 | 11:00 | 75 | 3 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 20 2024 | 12:00 | 75 | 1 |
| Ivanhoe C414/F514 | 6 | 414 | 48_141_0029 | July 24 2024 | 11:00 | 75 | 1 |
| Ascarate Park SE C37/A332/A172/X159 | 6 | 37 | 48_141_0055 | July 25 2024 | 10:00 | 75 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 12 2024 | 11:00 | 75 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | June 13 2024 | 10:00 | 75 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 23 2024 | 20:00 | 75 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | May 15 2024 | 12:00 | 75 | 1 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | May 15 2024 | 11:00 | 75 | 1 |
| Houston Westhollow C410/C3003 | 12 | 410 | 48_201_0066 | June 6 2024 | 10:00 | 75 | 1 |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | May 15 2024 | 10:00 | 75 | 1 N |
| Huffman Wolf Road C563 | 12 | 563 | 48_201_0563 | May 18 2024 | 10:00 | 75 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | June 14 2024 | 11:00 | 75 | 3 |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | July 1 2024 | 10:00 | 75 | 3 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | July 2 2024 | 12:00 | 75 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | May 29 2024 | 11:00 | 75 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | May 29 2024 | 11:00 | 75 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 11 2024 | 11:00 | 75 | 2 |
| Killeen Skylark Field C1047 | 9 | 1047 | 48_027_1047 | June 6 2024 | 11:00 | 74 | 1 |
| Heritage Middle School C622 | 13 | 622 | 48_029_0622 | June 6 2024 | 11:00 | 74 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | July 20 2024 | 11:00 | 74 | 1 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | July 20 2024 | 10:00 | 74 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | July 10 2024 | 11:00 | 74 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 7 2024 | 10:00 | 74 | 1 |
| Ascarate Park SE C37/A332/A172/X159 | 6 | 37 | 48_141_0055 | June 12 2024 | 09:00 | 74 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | July 10 2024 | 10:00 | 74 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 26 2024 | 11:00 | 74 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | May 14 2024 | 13:00 | 74 | 1 |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | July 20 2024 | 11:00 | 74 | 2 |
| Channelview C15/AH115 | 12 | 15 | 48_201_0026 | May 18 2024 | 10:00 | 74 | 3 |
| Lang C408 | 12 | 408 | 48_201_0047 | July 20 2024 | 12:00 | 74 | 2 |
| La Porte Sylvan Beach C556 | 12 | 556 | 48_201_0556 | May 15 2024 | 10:00 | 74 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | April 12 2024 | 10:00 | 74 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | May 19 2024 | 10:00 | 74 | 1 N |
| Tom Bass C558 | 12 | 558 | 48_201_0558 | June 7 2024 | 09:00 | 74 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | July 20 2024 | 11:00 | 74 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | July 20 2024 | 12:00 | 74 | 3 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | July 20 2024 | 10:00 | 74 | 1 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | July 11 2024 | 11:00 | 74 | 1 N |
| SETRPC 43 Jefferson Co Airport C643 | 10 | 643 | 48_245_0102 | May 15 2024 | 09:00 | 74 | 1 |
| SETRPC Port Arthur C628 | 10 | 628 | 48_245_0628 | June 12 2024 | 09:00 | 74 | 1 N |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | May 14 2024 | 11:00 | 74 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | July 11 2024 | 12:00 | 74 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | July 20 2024 | 12:00 | 74 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | May 29 2024 | 11:00 | 74 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 23 2024 | 11:00 | 74 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 20 2024 | 11:00 | 74 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | July 9 2024 | 11:00 | 74 | 1 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | May 14 2024 | 12:00 | 73 | 2 |
| Calaveras Lake C59 | 13 | 59 | 48_029_0059 | June 7 2024 | 09:00 | 73 | 1 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | May 14 2024 | 12:00 | 73 | 1 N |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | May 27 2024 | 04:00 | 73 | 1 N |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | July 20 2024 | 10:00 | 73 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 10 2024 | 11:00 | 73 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | June 16 2024 | 09:00 | 73 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 15 2024 | 11:00 | 73 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 9 2024 | 10:00 | 73 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 10 2024 | 09:00 | 73 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | July 19 2024 | 10:00 | 73 | 1 N |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | July 20 2024 | 10:00 | 73 | 1 N |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | April 12 2024 | 10:00 | 73 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | June 7 2024 | 10:00 | 73 | 2 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 6 2024 | 09:00 | 73 | 1 |
| Sheldon C551 | 12 | 551 | 48_201_0551 | May 18 2024 | 10:00 | 73 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | June 6 2024 | 10:00 | 73 | 1 N |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | July 19 2024 | 13:00 | 73 | 1 |
| Port Arthur West C28/A128/A228 | 10 | 28 | 48_245_0011 | May 15 2024 | 12:00 | 73 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | April 5 2024 | 10:00 | 73 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | April 12 2024 | 12:00 | 73 | 1 N |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | July 10 2024 | 10:00 | 73 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 20 2024 | 11:00 | 73 | 2 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | July 20 2024 | 11:00 | 73 | 1 |
| Killeen Skylark Field C1047 | 9 | 1047 | 48_027_1047 | July 11 2024 | 10:00 | 72 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | June 6 2024 | 11:00 | 72 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | June 6 2024 | 11:00 | 72 | 1 N |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | July 20 2024 | 12:00 | 72 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | May 18 2024 | 11:00 | 72 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | July 10 2024 | 09:00 | 72 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 25 2024 | 10:00 | 72 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | June 15 2024 | 11:00 | 72 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | June 12 2024 | 08:00 | 72 | 1 |
| Ojo De Agua C1021/FG121/FG221 | 6 | 1021 | 48_141_1021 | July 6 2024 | 12:00 | 72 | 1 |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | June 11 2024 | 08:00 | 72 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | April 30 2024 | 11:00 | 72 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | May 19 2024 | 10:00 | 72 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | May 27 2024 | 11:00 | 72 | 2 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 10 2024 | 11:00 | 72 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | June 22 2024 | 09:00 | 72 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | April 30 2024 | 10:00 | 72 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | June 6 2024 | 09:00 | 72 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | May 14 2024 | 12:00 | 72 | 1 N |
| Hamshire C64/C654 | 10 | 64 | 48_245_0022 | May 15 2024 | 10:00 | 72 | 1 |
| SETRPC 40 Sabine Pass C640/C1654 | 10 | 640 | 48_245_0101 | June 6 2024 | 11:00 | 72 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | July 18 2024 | 11:00 | 72 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | July 10 2024 | 10:00 | 72 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 20 2024 | 10:00 | 72 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | June 27 2024 | 10:00 | 72 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 10 2024 | 11:00 | 72 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 10 2024 | 12:00 | 72 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 10 2024 | 10:00 | 72 | 1 |
| CAPCOG Elgin C1613 | 11 | 1613 | 48_021_1613 | May 8 2024 | 11:00 | 71 | 1 N |
| Killeen Skylark Field C1047 | 9 | 1047 | 48_027_1047 | May 15 2024 | 09:00 | 71 | 1 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | May 29 2024 | 12:00 | 71 | 2 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | June 6 2024 | 11:00 | 71 | 2 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | June 14 2024 | 12:00 | 71 | 1 N |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | July 20 2024 | 10:00 | 71 | 3 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | June 14 2024 | 11:00 | 71 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 23 2024 | 11:00 | 71 | 1 |
| Italy C1044/A323 | 4 | 1044 | 48_139_1044 | July 9 2024 | 11:00 | 71 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | May 23 2024 | 11:00 | 71 | 1 |
| Ascarate Park SE C37/A332/A172/X159 | 6 | 37 | 48_141_0055 | July 26 2024 | 11:00 | 71 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 27 2024 | 09:00 | 71 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | July 11 2024 | 11:00 | 71 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | April 4 2024 | 12:00 | 71 | 1 |
| New Braunfels Airport C504 | 13 | 504 | 48_187_0504 | June 7 2024 | 10:00 | 71 | 1 N |
| Houston North Wayside C405/C1033 | 12 | 405 | 48_201_0046 | May 27 2024 | 11:00 | 71 | 1 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | July 20 2024 | 12:00 | 71 | 2 |
| Katy Park C559 | 12 | 559 | 48_201_0559 | June 13 2024 | 10:00 | 71 | 1 N |
| Wallisville Road C617 | 12 | 617 | 48_201_0617 | May 15 2024 | 10:00 | 71 | 1 N |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | June 7 2024 | 10:00 | 71 | 1 N |
| Baytown Garth C1017 | 12 | 1017 | 48_201_1017 | May 15 2024 | 10:00 | 71 | 1 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | July 20 2024 | 11:00 | 71 | 2 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | June 14 2024 | 12:00 | 71 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | May 14 2024 | 11:00 | 71 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | June 5 2024 | 10:00 | 71 | 1 |
| Waco Mazanec C1037 | 9 | 1037 | 48_309_1037 | July 11 2024 | 11:00 | 71 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | April 12 2024 | 12:00 | 71 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | April 13 2024 | 10:00 | 71 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | April 30 2024 | 10:00 | 71 | 1 |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | June 5 2024 | 11:00 | 71 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 20 2024 | 11:00 | 71 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 13 2024 | 11:00 | 71 | 1 |
| POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site. | |||||||
| N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes. | |||||||
Interpreting the AQI
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.