What does tceq stand for? TCEQ stands for Texas Commission on Environmental Quality (formerly TNRCC) Suggest new definition. This definition appears very frequently and is found in the following Acronym Finder categories: Military and Government. Science, medicine, engineering, etc.What does tceq stand for in water? In 2013, the Texas Legislature transferred the economic regulation of water and sewer utilities from the Texas Commission on Environmental Quality (TCEQ) to the PUC. This transfer involved the programs dealing with the regulation of water and sewer rates and services, Certificates of Convenience and Necessity (CCNs) and Sale/Transfer/Mergers.