Tex. Health & Safety Code § 161.0213

Reports, records, and information furnished to the commissioner or the commissioner's designee or the Texas Commission on Environmental Quality that relate to an epidemiologic or toxicologic investigation of human illnesses or conditions and of environmental exposures that are harmful or believed to be harmful to the public health are not public information under Chapter 552, Government Code, and are subject to the same confidentiality requirements as described by Section 81.046.