Tex. Health & Safety Code § 361.803
A person, including a local government, may submit a request to the executive director for a municipal setting designation for property if:
(2) a public drinking water supply system exists that satisfies the requirements of Chapter 341 and that supplies or is capable of supplying drinking water to:
Acts 2003, 78th Leg., ch. 731, Sec. 1, eff. Sept. 1, 2003.
Acts 2007, 80th Leg., R.S., Ch. 240 (H.B. 2018), Sec. 1, eff. May 25, 2007.