Developed for the Texas Commmision on Environmental Quality by Wiland Consulting, Inc.

View version history (PDF)

A downloadable version of QUAL_TX without login may be available on the TCEQ website. If not, for any given version, the LA-QUAL model will yield identical results if the the "Model Assumptions" are set to "Texas (TCEQ) defaults" in the menu Preferences/Additional Preferences. LA-QUAL may have newer versions than QUAL-TX with additional enhancements and corrections which will be shown in the version history. Information on LA-QUAL can be found here.

Download zipped file with QUAL-TX executable, license agreement, User's Manual, and example data set (these downloads require login):

Version 9.35

Version 9.34

Version 9.33

Version 9.32

Version 9.31

Version 9.30