Per the Texas Utilities Code, Title 4, Chapter 182, Section 052 - Sec. 182.052. CONFIDENTIALITY OF PERSONAL INFORMATION.
(a) Except as provided by Section 182.054, a government-operated utility may not disclose personal information in a customer's account record, or any information relating to the volume or units of utility usage or the amounts billed to or collected from the individual for utility usage, if the customer requests that the government-operated utility keep the information confidential. However, a government-operated utility may disclose information related to the customer's volume or units of utility usage or amounts billed to or collected from the individual for utility usage if the primary source of water for such utility was a sole-source designated aquifer.
(b) A customer may request confidentiality by delivering to the government-operated utility an appropriately marked form provided under Subsection (c)(3) or any other written request for confidentiality.