Municipalities and counties are authorized, but not required, to provide utility services to properties that lie beyond their territorial borders. See G.S. 160A-312; G.S. 153A-275; see also City of Randleman v. Hinshaw, 2 N.C. App. 381 (1968) (“A [local government] which operates its own water and sewer system is under no duty to furnish water […]