Texas Local Government Code - LOC GOV'T § 552.001. Municipal Utility Systems; General Powers

(a) In this section, “utility system” means a water, sewer, gas, or electricity system.

(b) A municipality may purchase, construct, or operate a utility system inside or outside the municipal boundaries and may regulate the system in a manner that protects the interests of the municipality. The municipality may own land inside or outside its boundaries for these purposes.

(c) A municipality may extend the lines of its utility systems outside the municipal boundaries and may sell water, sewer, gas, or electric service to any person outside its boundaries. The municipality may contract with persons outside its boundaries to permit them to connect with those utility systems on terms the municipality considers to be in its best interest. This subsection does not authorize the extension of electric lines into the corporate limits of another municipality.

(d) A municipality that owns or operates a utility system may prescribe the kind of water or gas mains, sewer pipes, and electric appliances that may be used inside or outside the municipality. The municipality may inspect those facilities and appliances, require that they be kept in good condition at all times, and prescribe the necessary rules, which may include penalties, concerning them.