Eight-Hour Ozone High Value Days for 2022
as of July 1
The table below lists the daily maximum eight-hour ozone concentrations measured which meet or exceed 71 parts per billion in 2022 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.
| 2022 Sorted by Maximum Value | |||||||
|---|---|---|---|---|---|---|---|
| Location | Region | CAMS | AQS | Date | Time | Value | POC |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 30 2022 | 10:00 | 100 | 1 |
| Lockhart C1604 | 11 | 1604 | 48_055_1604 | May 26 2022 | 11:00 | 98 | 1 N |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 20 2022 | 10:00 | 97 | 1 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | June 20 2022 | 07:00 | 96 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 30 2022 | 10:00 | 93 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | June 20 2022 | 11:00 | 92 | 1 N |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 30 2022 | 10:00 | 91 | 1 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | May 6 2022 | 11:00 | 91 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | June 20 2022 | 10:00 | 90 | 2 |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | May 26 2022 | 11:00 | 90 | 1 N |
| CAPCOG Bastrop CAMS1612 | 11 | 1612 | 48_021_1612 | May 26 2022 | 11:00 | 89 | 1 N |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | May 25 2022 | 13:00 | 89 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | April 27 2022 | 11:00 | 88 | 1 N |
| CAPCOG Lake Georgetown C690 | 11 | 690 | 48_491_0690 | June 29 2022 | 12:00 | 88 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | June 20 2022 | 10:00 | 87 | 3 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | June 29 2022 | 11:00 | 87 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 30 2022 | 10:00 | 87 | 1 |
| UH Launch Trailer C1611 | 12 | 1611 | 48_201_1611 | June 20 2022 | 10:00 | 86 | 1 N |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | May 27 2022 | 12:00 | 86 | 1 |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | June 20 2022 | 10:00 | 85 | 1 N |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | June 29 2022 | 11:00 | 85 | 2 |
| CAPCOG Elgin C1613 | 11 | 1613 | 48_021_1613 | May 26 2022 | 11:00 | 84 | 1 N |
| Lang C408 | 12 | 408 | 48_201_0047 | April 27 2022 | 11:00 | 84 | 2 |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | June 20 2022 | 10:00 | 84 | 1 N |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | June 29 2022 | 12:00 | 84 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | June 30 2022 | 10:00 | 84 | 2 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | June 30 2022 | 10:00 | 83 | 1 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | March 2 2022 | 11:00 | 83 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | May 26 2022 | 11:00 | 83 | 1 N |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | June 27 2022 | 10:00 | 83 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | May 12 2022 | 11:00 | 83 | 1 N |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | May 27 2022 | 12:00 | 83 | 2 |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | June 29 2022 | 10:00 | 82 | 1 N |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 10 2022 | 13:00 | 82 | 1 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 20 2022 | 10:00 | 82 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | April 27 2022 | 10:00 | 82 | 1 |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | June 29 2022 | 10:00 | 82 | 1 N |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | June 28 2022 | 12:00 | 82 | 1 |
| SETRPC Mauriceville 42 C642/C311/C665 | 10 | 642 | 48_361_1100 | May 28 2022 | 11:00 | 82 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | May 27 2022 | 13:00 | 82 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 9 2022 | 12:00 | 81 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | June 30 2022 | 09:00 | 81 | 2 |
| Heritage Middle School C622 | 13 | 622 | 48_029_0622 | June 29 2022 | 11:00 | 80 | 1 N |
| Lockhart C1604 | 11 | 1604 | 48_055_1604 | June 29 2022 | 10:00 | 80 | 1 N |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | May 27 2022 | 11:00 | 80 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | May 25 2022 | 11:00 | 80 | 1 N |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | June 29 2022 | 11:00 | 80 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | May 16 2022 | 11:00 | 80 | 2 |
| CAPCOG Round Rock Brushy Creek W C1620 | 11 | 1620 | 48_491_1620 | June 29 2022 | 12:00 | 80 | 1 N |
| Killeen Skylark Field C1047 | 9 | 1047 | 48_027_1047 | June 29 2022 | 12:00 | 79 | 1 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | June 29 2022 | 11:00 | 79 | 2 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 22 2022 | 11:00 | 79 | 1 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | April 27 2022 | 11:00 | 79 | 2 |
| Park Place C416 | 12 | 416 | 48_201_0416 | June 20 2022 | 10:00 | 79 | 1 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | June 16 2022 | 11:00 | 79 | 2 |
| SETRPC 40 Sabine Pass C640/C1654 | 10 | 640 | 48_245_0101 | May 27 2022 | 11:00 | 79 | 1 |
| Calaveras Lake C59 | 13 | 59 | 48_029_0059 | June 29 2022 | 10:00 | 78 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 10 2022 | 12:00 | 78 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 21 2022 | 10:00 | 78 | 1 |
| Baytown Garth C1017 | 12 | 1017 | 48_201_1017 | June 26 2022 | 10:00 | 78 | 1 |
| SETRPC 40 Sabine Pass C640/C1654 | 10 | 640 | 48_245_0101 | May 28 2022 | 10:00 | 78 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 28 2022 | 10:00 | 78 | 1 |
| CAPCOG East Austin C1619 | 11 | 1619 | 48_453_1619 | June 29 2022 | 12:00 | 78 | 1 N |
| UH Smith Point C1606 | 12 | 1606 | 48_071_1606 | May 25 2022 | 09:00 | 77 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | March 26 2022 | 12:00 | 77 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | June 10 2022 | 12:00 | 77 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | May 16 2022 | 10:00 | 77 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 20 2022 | 09:00 | 77 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 23 2022 | 12:00 | 77 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 4 2022 | 11:00 | 77 | 1 |
| Houston Harvard Street C417 | 12 | 417 | 48_201_0417 | June 16 2022 | 11:00 | 77 | 1 |
| Baytown Garth C1017 | 12 | 1017 | 48_201_1017 | May 26 2022 | 10:00 | 77 | 1 |
| Karnack C85/AFHP303 | 5 | 85 | 48_203_0002 | June 21 2022 | 10:00 | 77 | 1 |
| Parker County C76 | 4 | 76 | 48_367_0081 | May 16 2022 | 12:00 | 77 | 1 |
| Tyler Airport Relocated C82 | 5 | 82 | 48_423_0007 | June 29 2022 | 11:00 | 77 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 29 2022 | 11:00 | 77 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | May 16 2022 | 11:00 | 77 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | May 27 2022 | 11:00 | 77 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | June 29 2022 | 11:00 | 77 | 1 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | June 30 2022 | 09:00 | 76 | 1 |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | May 12 2022 | 10:00 | 76 | 1 N |
| Clinton C403/C304/AH113 | 12 | 403 | 48_201_1035 | June 16 2022 | 11:00 | 76 | 3 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | June 26 2022 | 10:00 | 76 | 1 |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | June 28 2022 | 10:00 | 76 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | May 27 2022 | 12:00 | 76 | 2 |
| CAPCOG Bastrop CAMS1612 | 11 | 1612 | 48_021_1612 | June 29 2022 | 13:00 | 75 | 1 N |
| CAPCOG Elgin C1613 | 11 | 1613 | 48_021_1613 | June 29 2022 | 11:00 | 75 | 1 N |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | June 29 2022 | 11:00 | 75 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | June 29 2022 | 11:00 | 75 | 1 N |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | May 27 2022 | 11:00 | 75 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 23 2022 | 12:00 | 75 | 1 |
| Chamizal C41/AH126 | 6 | 41 | 48_141_0044 | June 30 2022 | 10:00 | 75 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 11 2022 | 10:00 | 75 | 1 |
| Houston North Wayside C405/C1033 | 12 | 405 | 48_201_0046 | June 20 2022 | 10:00 | 75 | 1 |
| Houston Westhollow C410/C3003 | 12 | 410 | 48_201_0066 | June 20 2022 | 11:00 | 75 | 1 |
| UH Launch Trailer C1611 | 12 | 1611 | 48_201_1611 | June 4 2022 | 11:00 | 75 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | March 1 2022 | 11:00 | 75 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | March 3 2022 | 11:00 | 75 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | March 26 2022 | 11:00 | 75 | 1 N |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | May 27 2022 | 12:00 | 75 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | June 4 2022 | 11:00 | 75 | 1 N |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 17 2022 | 10:00 | 75 | 1 |
| Austin North Hills Drive C3/A322 | 11 | 3 | 48_453_0014 | June 29 2022 | 12:00 | 75 | 2 |
| City of Garden Ridge C505 | 13 | 505 | 48_091_0505 | June 29 2022 | 11:00 | 74 | 1 N |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | May 6 2022 | 12:00 | 74 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 25 2022 | 11:00 | 74 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 25 2022 | 10:00 | 74 | 1 |
| Skyline Park C72 | 6 | 72 | 48_141_0058 | June 30 2022 | 11:00 | 74 | 1 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | June 20 2022 | 12:00 | 74 | 2 |
| West Houston C554 | 12 | 554 | 48_201_0554 | April 14 2022 | 11:00 | 74 | 1 N |
| Nederland 17th Street C1035 | 10 | 1035 | 48_245_1035 | May 28 2022 | 10:00 | 74 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | June 30 2022 | 09:00 | 74 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | March 2 2022 | 11:00 | 74 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | June 17 2022 | 13:00 | 74 | 1 |
| Temple Georgia C1045 | 9 | 1045 | 48_027_1045 | June 29 2022 | 11:00 | 73 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | June 23 2022 | 11:00 | 73 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | March 26 2022 | 11:00 | 73 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | May 26 2022 | 09:00 | 73 | 1 N |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | March 1 2022 | 13:00 | 73 | 1 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | June 21 2022 | 10:00 | 73 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 4 2022 | 12:00 | 73 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | May 26 2022 | 11:00 | 73 | 1 N |
| Wallisville Road C617 | 12 | 617 | 48_201_0617 | May 26 2022 | 10:00 | 73 | 1 N |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | June 26 2022 | 10:00 | 73 | 2 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | May 26 2022 | 10:00 | 73 | 1 |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | June 20 2022 | 08:00 | 73 | 1 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | March 25 2022 | 12:00 | 73 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | March 2 2022 | 11:00 | 73 | 1 N |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 17 2022 | 10:00 | 73 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | June 23 2022 | 12:00 | 73 | 1 N |
| West Orange C9/A141 | 10 | 9 | 48_361_1001 | May 28 2022 | 12:00 | 73 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 9 2022 | 11:00 | 73 | 1 |
| CAPCOG Lake Georgetown C690 | 11 | 690 | 48_491_0690 | June 30 2022 | 09:00 | 73 | 1 N |
| CAPCOG Bastrop CAMS1612 | 11 | 1612 | 48_021_1612 | June 4 2022 | 12:00 | 72 | 1 N |
| CAPCOG Elgin C1613 | 11 | 1613 | 48_021_1613 | March 2 2022 | 10:00 | 72 | 1 N |
| Killeen Skylark Field C1047 | 9 | 1047 | 48_027_1047 | May 27 2022 | 09:00 | 72 | 1 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | June 20 2022 | 10:00 | 72 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | June 29 2022 | 10:00 | 72 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | March 3 2022 | 11:00 | 72 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 21 2022 | 10:00 | 72 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | June 24 2022 | 11:00 | 72 | 1 |
| Ascarate Park SE C37/A332/A172/X159 | 6 | 37 | 48_141_0055 | June 30 2022 | 10:00 | 72 | 1 |
| Channelview C15/AH115 | 12 | 15 | 48_201_0026 | June 20 2022 | 09:00 | 72 | 3 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | June 20 2022 | 10:00 | 72 | 2 |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | June 16 2022 | 11:00 | 72 | 1 N |
| Baytown Garth C1017 | 12 | 1017 | 48_201_1017 | June 20 2022 | 09:00 | 72 | 1 |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | May 16 2022 | 09:00 | 72 | 2 |
| Karnack C85/AFHP303 | 5 | 85 | 48_203_0002 | March 3 2022 | 11:00 | 72 | 1 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | June 30 2022 | 11:00 | 72 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | March 16 2022 | 11:00 | 72 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | March 25 2022 | 11:00 | 72 | 1 N |
| SETRPC 40 Sabine Pass C640/C1654 | 10 | 640 | 48_245_0101 | May 26 2022 | 10:00 | 72 | 1 |
| SETRPC Port Arthur C628 | 10 | 628 | 48_245_0628 | May 26 2022 | 11:00 | 72 | 1 N |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | May 28 2022 | 12:00 | 72 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | June 29 2022 | 10:00 | 72 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | June 21 2022 | 10:00 | 72 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | June 30 2022 | 09:00 | 72 | 1 |
| CAPCOG East Austin C1619 | 11 | 1619 | 48_453_1619 | May 26 2022 | 11:00 | 72 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | May 6 2022 | 12:00 | 71 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | May 14 2022 | 10:00 | 71 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 20 2022 | 10:00 | 71 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | March 3 2022 | 11:00 | 71 | 1 |
| Socorro Hueco C49/F312 | 6 | 49 | 48_141_0057 | June 10 2022 | 10:00 | 71 | 1 |
| Galveston 99th St. C1034/A320/X183 | 12 | 1034 | 48_167_1034 | June 27 2022 | 14:00 | 71 | 1 |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | May 16 2022 | 10:00 | 71 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | May 11 2022 | 11:00 | 71 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | May 26 2022 | 11:00 | 71 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | June 26 2022 | 10:00 | 71 | 1 |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | May 26 2022 | 11:00 | 71 | 1 N |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | May 26 2022 | 10:00 | 71 | 2 |
| Dripping Springs School C614 | 11 | 614 | 48_209_0614 | June 4 2022 | 12:00 | 71 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | March 26 2022 | 10:00 | 71 | 1 N |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | May 27 2022 | 11:00 | 71 | 1 N |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | June 30 2022 | 09:00 | 71 | 1 |
| Hamshire C64/C654 | 10 | 64 | 48_245_0022 | May 26 2022 | 10:00 | 71 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | May 16 2022 | 10:00 | 71 | 1 |
| Liberty Sam Houston Library C1626 | 12 | 1626 | 48_291_1626 | March 26 2022 | 10:00 | 71 | 1 N |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 12 2022 | 11:00 | 71 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | May 6 2022 | 11:00 | 71 | 1 N |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | May 26 2022 | 11:00 | 71 | 1 |
| Tyler Airport Relocated C82 | 5 | 82 | 48_423_0007 | March 2 2022 | 10:00 | 71 | 1 |
| Tyler Airport Relocated C82 | 5 | 82 | 48_423_0007 | March 26 2022 | 11:00 | 71 | 1 |
| Tyler Airport Relocated C82 | 5 | 82 | 48_423_0007 | May 26 2022 | 10:00 | 71 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | March 3 2022 | 11:00 | 71 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | March 26 2022 | 12:00 | 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.