Letter from TCEQ to the EPA requesting an attainment date extension for the HGB 2008 Eight-Hour Ozone NAAQS nonattainment area.
2008 Ozone NAAQS
Downloads folder for 2008 Ozone NAAQS - Houston Galveston Brazoria Area
Archive page for the adopted HGB 2008 Ozone NAAQS Serious Attainment Demonstration SIP Revision.