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Implementing the Surface Water Quality Standards in Permitting

The TCEQ establishes procedures that describe how surface water quality standards are applied in wastewater permitting.

Hot Topic Notice

Comments Due By March 31, 2015

Please submit comments regarding a thermal screening process for TPDES permits that we have been discussing in the previous three stakeholder meetings by the due date referenced above to: or to:

Lynda Clayton, MC-150
TCEQ – Water Quality Division
PO Box 13087
Austin, TX 78711-3087

TCEQ staff will be evaluating comments and revising a possible screening approach for the remainder of 2015.

Please note that, due to technical issues, the February attendee list is incomplete. If you were present and do not see your name and would like it added please send an email notification to:

Temperature process flow chart November 2014Adobe Acrobat PDF Document

Thermal Plume Characterization Studies Adobe Acrobat PDF Document

For questions or comments on temperature issues or meetings please contact Lynda Clayton at .


What Are The Implementation Procedures?

The TCEQ is responsible for maintaining and enhancing water quality in the state. One aspect of that responsibility involves implementation of the Texas Surface Water Quality Standards when issuing permits for wastewater discharges to surface waters of the state. The TCEQ issues wastewater permits under a program called the Texas Pollutant Discharge Elimination System (TPDES). The TCEQ maintains a document entitled “Procedures to Implement the Texas Surface Water Quality Standards” (Implementation Procedures) that explains procedures used to apply water quality standards to permits issued under the TPDES program. This guidance document is updated as needed to reflect changes in the water quality standards and in agency policy and procedures. The implementation procedures are subject to Environmental Protection Agency (EPA) review and approval.

Current 2010 Implementation Procedures

On June 30, 2010, the Commission approved a revision to the Implementation Procedures. The EPA has reviewed the June 2010 Implementation Procedures and has approved all but the following sections for use in TPDES permitting: whole effluent toxicity testing, dechlorination requirements for minor domestic wastewater treatment facilities, and variances. The TCEQ continues to work with the EPA to resolve these remaining issues.

Draft 2012 Implementation Procedures

On January 11, 2012, the Commission approved for public comment a draft revision of the 2010 Implementation Procedures. The draft 2012 Implementation Procedures revision was proposed to address EPA objections to portions of the 2010 Implementation Procedures but has not been approved by the Commission or EPA for use in wastewater permitting.

Previous Implementation Procedures

For More Information

For information on the Implementation Procedures, contact Gregg Easley at 512-239-4539 or You may also send a fax to 512-239-4420 or a letter to TCEQ, Attn: Gregg Easley, MC-150, P.O. Box 13087, Austin, Texas 78711-3087.

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