On April 30, 1997, the three-member commission of the TNRCC (now TCEQ) adopted proposed amendments to the states existing 1995 surface water quality standards, as codified by rule in the Texas Administrative Code (TAC), Title 30, Chapter 307. Since then, the three-member commission adopted another version of the standards on July 26, 2000. For the 2000 standards to be used for federal programs, the EPA must approve them. Since the EPA has yet to act on the entire 2000 standards, both the 1997 and 2000 standards are being used in federal permitting decisions, such as the TPDES program. The 1997 standards remain in effect for those portions of the 2000 standards not acted on by EPA. For non-federal programs, the 2000 standards are in effect unless specifically disapproved by EPA.

• Portions of the standards on which EPA has acted and the action date. EPA Timeline of Approval of Standards.

• Portions of the 2000 Standards still Under Review by EPA.

The 1997 standards are available below in Portable Document Format (PDF). (Help with PDF.) For a hard copy contact the Standards Team at 512/239-4671.

• TNRCC (now TCEQ) Chapter 307 Standards (1997)

• Chapter 307 Standards Cover Page

• Chapter 307 Standards Table of Contents

• Chapter 307 Standards History

• Chapter 307 Standards Index

How the standards are applied in permitting is documented in the Procedures to Implement the Texas Surface Water Quality Standards RG-194.