Austin-Round Rock and the State Implementation Plan
Information on the State Implementation Plan (SIP) to improve air quality in the Austin-Round Rock area and meet the requirements of the Federal Clean Air Act. The area includes Travis, Williamson, Bastrop, Hays, and Caldwell counties.
Attainment Status
Current air quality designations for the six criteria pollutants
Air Quality History
Austin air quality history from the 1990s
to the present
Latest Activities
Information about the latest events and activities related to Austin and the SIP
Air Quality Plans
Adopted SIP revisions and agreements from the 1970s to the present
- Current Ozone Air Quality Plan
- Complete List of Texas SIP Revisions (see AUS column)
Air Quality Control Measures
Information on air quality control measures implemented in Texas
Contact Information and Related Links
How to contact TCEQ SIP staff, local air quality planning groups, and other helpful links