Texas Health and Safety Code - HEALTH & SAFETY § 341.031. Public Drinking Water

(a) Public drinking water must be free from deleterious matter and must comply with the standards established by the commission or the United States Environmental Protection Agency. The commission may adopt and enforce rules to implement the federal Safe Drinking Water Act (42 U.S.C. Section 300f et seq.).

(b) In a public place or an establishment catering to the public, a common drinking cup may not be used.

(c) Drinking water may not be served except in sanitary containers or through other sanitary mediums.

(d) In this section, “common drinking cup” means a water or other beverage receptacle used for serving more than one person. The term does not include a water or other beverage receptacle that is properly washed and sterilized after each use.