Eight-Hour Ozone High Value Days for 2013
as of December 8
The table below lists the daily maximum eight-hour ozone concentrations measured which meet or exceed 76 parts per billion in 2013 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.
| 2013 Sorted by Maximum Value | |||||||
|---|---|---|---|---|---|---|---|
| Location | Region | CAMS | AQS | Date | Time | Value | POC |
| La Porte Sylvan Beach C556 | 12 | 556 | 48_201_0556 | September 25 2013 | 11:00 | 124 | 1 N |
| Seabrook Friendship Park C45 | 12 | 45 | 48_201_1050 | September 25 2013 | 11:00 | 104 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | September 4 2013 | 11:00 | 100 | 2 |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | October 9 2013 | 11:00 | 99 | 1 N |
| Keller C17 | 4 | 17 | 48_439_2003 | September 4 2013 | 11:00 | 95 | 2 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | August 16 2013 | 10:00 | 94 | 1 |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | September 4 2013 | 11:00 | 93 | 1 |
| Arlington Municipal Airport C61 | 4 | 61 | 48_439_3011 | August 1 2013 | 11:00 | 93 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 5 2013 | 11:00 | 90 | 1 |
| Texas City 34th St. C620 | 12 | 620 | 48_167_0056 | September 25 2013 | 11:00 | 89 | 1 N |
| Park Place C416 | 12 | 416 | 48_201_0416 | September 25 2013 | 10:00 | 89 | 1 |
| Tom Bass C558 | 12 | 558 | 48_201_0558 | August 16 2013 | 11:00 | 89 | 1 N |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | September 26 2013 | 12:00 | 89 | 1 N |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | August 30 2013 | 11:00 | 89 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 4 2013 | 10:00 | 89 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 6 2013 | 11:00 | 89 | 1 |
| CAPCOG Lake Georgetown C690 | 11 | 690 | 48_491_0690 | September 25 2013 | 11:00 | 89 | 1 N |
| Lang C408 | 12 | 408 | 48_201_0047 | July 3 2013 | 10:00 | 88 | 2 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | September 4 2013 | 10:00 | 88 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | June 4 2013 | 10:00 | 87 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | September 25 2013 | 10:00 | 87 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | August 1 2013 | 10:00 | 87 | 3 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 4 2013 | 11:00 | 87 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 5 2013 | 10:00 | 87 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | August 30 2013 | 11:00 | 87 | 2 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | June 3 2013 | 10:00 | 86 | 1 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | July 4 2013 | 09:00 | 86 | 1 |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | June 4 2013 | 11:00 | 86 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | September 26 2013 | 10:00 | 86 | 1 N |
| Hou.DeerPrk2 C35/235/1001/AFH139FP239 | 12 | 35 | 48_201_1039 | September 25 2013 | 11:00 | 86 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | August 30 2013 | 11:00 | 86 | 2 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | September 23 2013 | 11:00 | 85 | 2 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | June 4 2013 | 10:00 | 85 | 1 N |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | August 20 2013 | 11:00 | 85 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | August 30 2013 | 11:00 | 85 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | August 31 2013 | 11:00 | 85 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 6 2013 | 11:00 | 85 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | September 26 2013 | 11:00 | 85 | 1 |
| Midlothian OFW C52/A137 | 4 | 52 | 48_139_0016 | September 3 2013 | 11:00 | 85 | 1 |
| U of H-Sugarland C696 | 12 | 696 | 48_157_0696 | June 3 2013 | 11:00 | 85 | 1 N |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | August 16 2013 | 10:00 | 85 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | October 8 2013 | 11:00 | 85 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | September 26 2013 | 10:00 | 85 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | July 5 2013 | 10:00 | 84 | 1 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | July 2 2013 | 10:00 | 84 | 1 |
| Bulverde Elementary C503 | 13 | 503 | 48_091_0503 | September 25 2013 | 10:00 | 84 | 1 N |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | September 3 2013 | 11:00 | 84 | 3 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 25 2013 | 12:00 | 84 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 26 2013 | 10:00 | 84 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | August 20 2013 | 11:00 | 84 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | August 30 2013 | 10:00 | 84 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | August 31 2013 | 10:00 | 84 | 1 |
| Italy C1044/A323 | 4 | 1044 | 48_139_1044 | September 3 2013 | 12:00 | 84 | 1 |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | August 31 2013 | 11:00 | 84 | 1 N |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | April 22 2013 | 11:00 | 84 | 1 N |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 3 2013 | 12:00 | 84 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | August 1 2013 | 12:00 | 84 | 2 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | July 4 2013 | 11:00 | 83 | 1 |
| CPS Pecan Valley C678 | 13 | 678 | 48_029_0055 | September 24 2013 | 11:00 | 83 | 1 N |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | August 29 2013 | 12:00 | 83 | 1 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | August 1 2013 | 11:00 | 83 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | June 3 2013 | 12:00 | 83 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 5 2013 | 10:00 | 83 | 1 |
| U of H-Sugarland C696 | 12 | 696 | 48_157_0696 | October 8 2013 | 11:00 | 83 | 1 N |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | August 28 2013 | 11:00 | 83 | 2 |
| Houston Monroe C406 | 12 | 406 | 48_201_0062 | September 25 2013 | 10:00 | 83 | 1 |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | September 25 2013 | 11:00 | 83 | 1 N |
| HRM-3 Haden Road C603/A114 | 12 | 603 | 48_201_0803 | September 25 2013 | 11:00 | 83 | 1 N |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | August 1 2013 | 12:00 | 83 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | September 4 2013 | 10:00 | 83 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 5 2013 | 11:00 | 83 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 12 2013 | 11:00 | 83 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | August 29 2013 | 12:00 | 82 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | August 29 2013 | 11:00 | 82 | 3 |
| El Paso UTEP C12/A125/X151 | 6 | 12 | 48_141_0037 | July 3 2013 | 11:00 | 82 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | May 13 2013 | 11:00 | 82 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | October 9 2013 | 11:00 | 82 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | July 3 2013 | 10:00 | 82 | 1 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | July 5 2013 | 10:00 | 82 | 1 |
| Houston Monroe C406 | 12 | 406 | 48_201_0062 | July 4 2013 | 08:00 | 82 | 1 |
| Houston Westhollow C410 | 12 | 410 | 48_201_0066 | July 5 2013 | 10:00 | 82 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | July 3 2013 | 10:00 | 82 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | July 3 2013 | 11:00 | 82 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | October 9 2013 | 11:00 | 82 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | October 8 2013 | 11:00 | 82 | 1 N |
| Houston East C1/G316 | 12 | 1 | 48_201_1034 | September 25 2013 | 11:00 | 82 | 2 |
| CAPCOG San Marcos Staples Road C1675 | 11 | 1675 | 48_209_1675 | July 3 2013 | 12:00 | 82 | 1 N |
| Parker County C76 | 4 | 76 | 48_367_0081 | September 14 2013 | 12:00 | 82 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | August 30 2013 | 12:00 | 82 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | September 23 2013 | 11:00 | 81 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | June 3 2013 | 11:00 | 81 | 1 N |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | July 3 2013 | 10:00 | 81 | 1 |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | September 25 2013 | 10:00 | 81 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | July 5 2013 | 10:00 | 81 | 1 |
| City of Garden Ridge C505 | 13 | 505 | 48_091_0505 | September 25 2013 | 10:00 | 81 | 1 N |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | August 30 2013 | 10:00 | 81 | 3 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | September 4 2013 | 11:00 | 81 | 3 |
| Dallas Executive Airport C402 | 4 | 402 | 48_113_0087 | September 3 2013 | 11:00 | 81 | 1 |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | June 4 2013 | 10:00 | 81 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | August 28 2013 | 10:00 | 81 | 2 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | July 4 2013 | 10:00 | 81 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | July 4 2013 | 10:00 | 81 | 1 |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | May 7 2013 | 11:00 | 81 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | June 14 2013 | 11:00 | 81 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | September 26 2013 | 10:00 | 81 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | August 28 2013 | 11:00 | 81 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | August 16 2013 | 09:00 | 81 | 1 N |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | August 16 2013 | 13:00 | 81 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | September 5 2013 | 11:00 | 81 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 25 2013 | 11:00 | 81 | 2 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | August 30 2013 | 11:00 | 80 | 1 |
| Danciger C618 | 12 | 618 | 48_039_0618 | August 17 2013 | 11:00 | 80 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | September 6 2013 | 11:00 | 80 | 1 |
| U of H-Sugarland C696 | 12 | 696 | 48_157_0696 | July 4 2013 | 12:00 | 80 | 1 N |
| Houston Aldine C8/AF108/X150 | 12 | 8 | 48_201_0024 | October 9 2013 | 10:00 | 80 | 2 |
| Northwest Harris Co. C26/A110/X154 | 12 | 26 | 48_201_0029 | July 3 2013 | 11:00 | 80 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | July 4 2013 | 10:00 | 80 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | August 16 2013 | 10:00 | 80 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | August 16 2013 | 09:00 | 80 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | August 28 2013 | 10:00 | 80 | 1 N |
| Tom Bass C558 | 12 | 558 | 48_201_0558 | September 25 2013 | 11:00 | 80 | 1 N |
| Atascocita C560 | 12 | 560 | 48_201_0560 | August 31 2013 | 10:00 | 80 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | July 3 2013 | 11:00 | 80 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | July 3 2013 | 11:00 | 80 | 1 N |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | June 28 2013 | 12:00 | 80 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 13 2013 | 11:00 | 80 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | September 13 2013 | 11:00 | 80 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | September 14 2013 | 10:00 | 80 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | September 5 2013 | 11:00 | 80 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | September 6 2013 | 11:00 | 80 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | September 14 2013 | 11:00 | 80 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 5 2013 | 10:00 | 80 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | August 29 2013 | 12:00 | 80 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | June 3 2013 | 10:00 | 79 | 1 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | August 18 2013 | 10:00 | 79 | 1 |
| CPS Pecan Valley C678 | 13 | 678 | 48_029_0055 | August 18 2013 | 10:00 | 79 | 1 N |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | September 24 2013 | 11:00 | 79 | 1 N |
| Bulverde Elementary C503 | 13 | 503 | 48_091_0503 | June 4 2013 | 10:00 | 79 | 1 N |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | July 31 2013 | 13:00 | 79 | 3 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | August 30 2013 | 10:00 | 79 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 13 2013 | 09:00 | 79 | 1 |
| U of H-Sugarland C696 | 12 | 696 | 48_157_0696 | July 5 2013 | 11:00 | 79 | 1 N |
| UH Coastal Center C697 | 12 | 697 | 48_167_0697 | September 25 2013 | 10:00 | 79 | 1 N |
| Longview C19/A127/C644 | 5 | 19 | 48_183_0001 | June 15 2013 | 09:00 | 79 | 2 |
| Longview C19/A127/C644 | 5 | 19 | 48_183_0001 | September 6 2013 | 10:00 | 79 | 2 |
| Lang C408 | 12 | 408 | 48_201_0047 | May 7 2013 | 10:00 | 79 | 2 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | June 3 2013 | 10:00 | 79 | 2 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | July 5 2013 | 10:00 | 79 | 2 |
| Houston Monroe C406 | 12 | 406 | 48_201_0062 | August 16 2013 | 10:00 | 79 | 1 |
| Houston Texas Avenue C411 | 12 | 411 | 48_201_0075 | August 16 2013 | 11:00 | 79 | 1 |
| Park Place C416 | 12 | 416 | 48_201_0416 | July 5 2013 | 10:00 | 79 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | July 5 2013 | 11:00 | 79 | 1 N |
| Mercer Arboretum C557 | 12 | 557 | 48_201_0557 | June 4 2013 | 10:00 | 79 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | August 9 2013 | 12:00 | 79 | 1 N |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | May 13 2013 | 11:00 | 79 | 1 N |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | August 31 2013 | 12:00 | 79 | 1 N |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | September 14 2013 | 11:00 | 79 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | August 31 2013 | 10:00 | 79 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | September 12 2013 | 13:00 | 79 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | August 20 2013 | 11:00 | 79 | 1 |
| Austin Northwest C3/A322 | 11 | 3 | 48_453_0014 | September 25 2013 | 10:00 | 79 | 2 |
| CAPCOG Lake Georgetown C690 | 11 | 690 | 48_491_0690 | June 3 2013 | 11:00 | 79 | 1 N |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | August 29 2013 | 11:00 | 78 | 1 |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | September 25 2013 | 11:00 | 78 | 1 N |
| Danciger C618 | 12 | 618 | 48_039_0618 | June 3 2013 | 10:00 | 78 | 1 N |
| Manvel Croix Park C84 | 12 | 84 | 48_039_1004 | July 5 2013 | 10:00 | 78 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | August 31 2013 | 10:00 | 78 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | September 1 2013 | 11:00 | 78 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | July 13 2013 | 12:00 | 78 | 3 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | September 6 2013 | 11:00 | 78 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 4 2013 | 10:00 | 78 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | August 19 2013 | 11:00 | 78 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 4 2013 | 10:00 | 78 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | September 6 2013 | 11:00 | 78 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | September 30 2013 | 11:00 | 78 | 1 |
| Midlothian OFW C52/A137 | 4 | 52 | 48_139_0016 | August 1 2013 | 11:00 | 78 | 1 |
| Longview C19/A127/C644 | 5 | 19 | 48_183_0001 | September 3 2013 | 11:00 | 78 | 2 |
| Channelview C15/AH115 | 12 | 15 | 48_201_0026 | September 25 2013 | 10:00 | 78 | 3 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | July 3 2013 | 10:00 | 78 | 2 |
| Houston Croquet C409 | 12 | 409 | 48_201_0051 | September 25 2013 | 10:00 | 78 | 2 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | September 25 2013 | 11:00 | 78 | 1 |
| Houston Westhollow C410 | 12 | 410 | 48_201_0066 | August 19 2013 | 10:00 | 78 | 1 |
| Houston Westhollow C410 | 12 | 410 | 48_201_0066 | October 8 2013 | 10:00 | 78 | 1 |
| West Houston C554 | 12 | 554 | 48_201_0554 | July 4 2013 | 10:00 | 78 | 1 N |
| Wallisville Road C617 | 12 | 617 | 48_201_0617 | August 30 2013 | 10:00 | 78 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | July 4 2013 | 09:00 | 78 | 1 N |
| Seabrook Friendship Park C45 | 12 | 45 | 48_201_1050 | August 29 2013 | 10:00 | 78 | 1 |
| Granbury C73/C681 | 4 | 73 | 48_221_0001 | July 3 2013 | 12:00 | 78 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | September 26 2013 | 10:00 | 78 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | September 3 2013 | 11:00 | 78 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | May 14 2013 | 10:00 | 78 | 1 |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | June 28 2013 | 15:00 | 78 | 1 |
| Parker County C76 | 4 | 76 | 48_367_0081 | September 4 2013 | 13:00 | 78 | 1 |
| Tyler Airport Relocated C82 | 5 | 82 | 48_423_0007 | September 4 2013 | 10:00 | 78 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | July 25 2013 | 11:00 | 78 | 2 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | August 19 2013 | 11:00 | 78 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 25 2013 | 12:00 | 78 | 1 |
| CAPCOG Lake Georgetown C690 | 11 | 690 | 48_491_0690 | July 5 2013 | 11:00 | 78 | 1 N |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | June 3 2013 | 12:00 | 77 | 2 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | August 18 2013 | 10:00 | 77 | 2 |
| Camp Bullis C58 | 13 | 58 | 48_029_0052 | May 13 2013 | 10:00 | 77 | 1 |
| CPS Pecan Valley C678 | 13 | 678 | 48_029_0055 | July 3 2013 | 11:00 | 77 | 1 N |
| Elm Creek Elementary C501 | 13 | 501 | 48_029_0501 | July 3 2013 | 11:00 | 77 | 1 N |
| Heritage Middle School C622 | 13 | 622 | 48_029_0622 | September 24 2013 | 11:00 | 77 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | August 20 2013 | 11:00 | 77 | 1 |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | September 26 2013 | 11:00 | 77 | 1 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | July 5 2013 | 11:00 | 77 | 1 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | July 31 2013 | 12:00 | 77 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | May 7 2013 | 11:00 | 77 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | July 6 2013 | 09:00 | 77 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 7 2013 | 11:00 | 77 | 1 |
| New Braunfels Airport C504 | 13 | 504 | 48_187_0504 | July 3 2013 | 11:00 | 77 | 1 N |
| Houston North Wayside C405 | 12 | 405 | 48_201_0046 | August 28 2013 | 09:00 | 77 | 1 |
| Houston Westhollow C410 | 12 | 410 | 48_201_0066 | July 3 2013 | 11:00 | 77 | 1 |
| Baytown Wetlands Center C552 | 12 | 552 | 48_201_0552 | October 24 2013 | 10:00 | 77 | 1 N |
| Tom Bass C558 | 12 | 558 | 48_201_0558 | July 4 2013 | 10:00 | 77 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | May 1 2013 | 12:00 | 77 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | August 31 2013 | 11:00 | 77 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | September 25 2013 | 10:00 | 77 | 1 N |
| Bunker Hill Village C562 | 12 | 562 | 48_201_0562 | August 19 2013 | 10:00 | 77 | 1 N |
| Beaumont-Downtown C2/A112/C2002 | 10 | 2 | 48_245_0009 | September 26 2013 | 09:00 | 77 | 2 |
| Port Arthur West C28/A128/A228 | 10 | 28 | 48_245_0011 | July 13 2013 | 11:00 | 77 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | August 1 2013 | 12:00 | 77 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | May 1 2013 | 12:00 | 77 | 1 N |
| Corsicana Airport C1051 | 4 | 1051 | 48_349_1051 | September 26 2013 | 10:00 | 77 | 1 |
| Eagle Mountain Lake C75 | 4 | 75 | 48_439_0075 | August 19 2013 | 12:00 | 77 | 1 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 5 2013 | 11:00 | 77 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 12 2013 | 11:00 | 77 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | August 19 2013 | 12:00 | 77 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 12 2013 | 11:00 | 77 | 1 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | September 26 2013 | 10:00 | 77 | 1 |
| Laredo Vidaurri C44/AFGP144/P244 | 16 | 44 | 48_479_0016 | September 23 2013 | 10:00 | 77 | 1 |
| CAPCOG Hutto College Street C6602 | 11 | 6602 | 48_491_6602 | September 25 2013 | 11:00 | 77 | 1 N |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | June 4 2013 | 10:00 | 76 | 2 |
| San Antonio Northwest C23 | 13 | 23 | 48_029_0032 | July 5 2013 | 11:00 | 76 | 2 |
| CPS Pecan Valley C678 | 13 | 678 | 48_029_0055 | September 25 2013 | 10:00 | 76 | 1 N |
| Fair Oaks Ranch C502 | 13 | 502 | 48_029_0502 | July 5 2013 | 11:00 | 76 | 1 N |
| Frisco C31/C680 | 4 | 31 | 48_085_0005 | September 4 2013 | 11:00 | 76 | 1 |
| Dallas Hinton St. C401/C60/AH161 | 4 | 401 | 48_113_0069 | June 28 2013 | 11:00 | 76 | 3 |
| Dallas North No.2 C63/C679 | 4 | 63 | 48_113_0075 | September 12 2013 | 10:00 | 76 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 1 2013 | 11:00 | 76 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 12 2013 | 11:00 | 76 | 1 |
| Denton Airport South C56/A163/X157 | 4 | 56 | 48_121_0034 | September 15 2013 | 10:00 | 76 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | July 6 2013 | 09:00 | 76 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | September 1 2013 | 10:00 | 76 | 1 |
| Pilot Point C1032 | 4 | 1032 | 48_121_1032 | October 9 2013 | 11:00 | 76 | 1 |
| Midlothian OFW C52/A137 | 4 | 52 | 48_139_0016 | September 26 2013 | 11:00 | 76 | 1 |
| Houston Bayland Park C53/A146 | 12 | 53 | 48_201_0055 | June 3 2013 | 11:00 | 76 | 1 |
| Houston Westhollow C410 | 12 | 410 | 48_201_0066 | June 3 2013 | 11:00 | 76 | 1 |
| Crosby Library C553 | 12 | 553 | 48_201_0553 | May 7 2013 | 10:00 | 76 | 1 N |
| Meyer Park C561 | 12 | 561 | 48_201_0561 | May 13 2013 | 11:00 | 76 | 1 N |
| Huffman Wolf Road C563 | 12 | 563 | 48_201_0563 | May 7 2013 | 11:00 | 76 | 1 N |
| Wallisville Road C617 | 12 | 617 | 48_201_0617 | September 25 2013 | 11:00 | 76 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | July 5 2013 | 10:00 | 76 | 1 N |
| UH Moody Tower C695 | 12 | 695 | 48_201_0695 | October 8 2013 | 11:00 | 76 | 1 N |
| Lynchburg Ferry C1015/A165 | 12 | 1015 | 48_201_1015 | September 25 2013 | 11:00 | 76 | 1 |
| Nederland High School C1035 | 10 | 1035 | 48_245_1035 | September 26 2013 | 09:00 | 76 | 1 |
| Cleburne Airport C77/C682 | 4 | 77 | 48_251_0003 | September 3 2013 | 11:00 | 76 | 1 |
| Kaufman C71/A304/X071 | 4 | 71 | 48_257_0005 | September 4 2013 | 11:00 | 76 | 1 |
| Conroe Relocated C78/A321 | 12 | 78 | 48_339_0078 | August 31 2013 | 12:00 | 76 | 1 |
| UH WG Jones Forest C698 | 12 | 698 | 48_339_0698 | August 9 2013 | 12:00 | 76 | 1 N |
| Holly Road C660 | 14 | 660 | 48_355_0660 | March 13 2013 | 13:00 | 76 | 1 N |
| Violet C664 | 14 | 664 | 48_355_0664 | July 1 2013 | 10:00 | 76 | 1 N |
| Parker County C76 | 4 | 76 | 48_367_0081 | July 3 2013 | 14:00 | 76 | 1 |
| Rockwall Heath C69 | 4 | 69 | 48_397_0001 | July 31 2013 | 13:00 | 76 | 1 |
| Ft. Worth Northwest C13/AH302 | 4 | 13 | 48_439_1002 | August 31 2013 | 10:00 | 76 | 2 |
| Keller C17 | 4 | 17 | 48_439_2003 | July 3 2013 | 12:00 | 76 | 2 |
| Grapevine Fairway C70/A301/X182 | 4 | 70 | 48_439_3009 | July 13 2013 | 10:00 | 76 | 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 - 0.059 |
| 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 |
- 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 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.