* * * * *
Texas—Ozone
[1-Hour standard]1
| Designated area | Designation | Classification | ||
|---|---|---|---|---|
| Date2 | Type | Date2 | Type | |
| * * * * * * * | ||||
| Houston-Galveston-Brazoria Area, TX: | See footnote 4 | See footnote 4 | See footnote 4 | See footnote 4. |
| Brazoria County4 | ||||
| Chambers County4 | ||||
| Fort Bend County4 | ||||
| Galveston County4 | ||||
| Harris County4 | ||||
| Liberty County4 | ||||
| Montgomery County4 | ||||
| Waller County4 | ||||
| * * * * * * * | ||||
1The 1-hour ozone standard, designations and classifications are revoked effective June 15, 2005 for areas in Texas except the San Antonio area where they are revoked effective April 15, 2009.
2The date at the time designations were revoked is October 18, 2000, unless otherwise noted.
* * * * * * *
4The Houston-Galveston-Brazoria Area was designated and classified as “Severe-17” nonattainment on November 15, 1990 and was so designated and classified when the 1-hour ozone standard, designations and classifications were revoked. The area has since attained the 1-hour ozone standard and met all the Clean Air Act criteria for redesignation. All 1-hour ozone standard anti-backsliding obligations for the area are terminated effective March 16, 2020.
* * * * *
Texas—1997 8-Hour Ozone NAAQS
[Primary and secondary]1
| Designated area | Designationa | Category/classification | ||
|---|---|---|---|---|
| Date1 | Type | Date1 | Type | |
| * * * * * * * | ||||
| Houston-Galveston-Brazoria, TX: | See footnote 4 | See footnote 4 | See footnote 4 | See footnote 4. |
| Brazoria County4 | ||||
| Chambers County4 | ||||
| Fort Bend County4 | ||||
| Galveston County4 | ||||
| Harris County4 | ||||
| Liberty County4 | ||||
| Montgomery County4 | ||||
| Waller County4 | ||||
| * * * * * * * | ||||
* * * * * * *
1The 1997 8-hour ozone NAAQS, designations and classifications were revoked effective April 6, 2015. The date at the time designations were revoked is June 15, 2004, unless otherwise noted.
* * * * * * *
4The Houston-Galveston-Brazoria, TX area was designated nonattainment effective June 15, 2004 and was classified as “Severe-15” effective October 31, 2008. The area has since attained the 1997 8-hour ozone standard and met all the Clean Air Act criteria for redesignation. All 1997 8-hour ozone standard anti-backsliding obligations for the area are terminated effective March 16, 2020.
* * * * *
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