City of Milwaukee v. Pub. Serv. Comm'n
In City of Milwaukee v. Pub. Serv. Comm'n, 268 Wis. 116, 66 N.W.2d 716 (Wis. 1954), the city appealed an order of the Public Service Commission of Wisconsin requiring it, as a public water utility, to furnish water to the plaintiff's property, part of which was located outside Milwaukee's city limits in the City of Glendale. 66 N.W.2d at 717.
The Wisconsin Supreme Court affirmed the order, framing the issue as "whether the city had extended its service and is holding itself out to serve in the general area within the City of Glendale in which the plaintiff's building is located." Id. at 718.
The court stated "every public utility has the obligation, within the scope of its undertaking, to furnish its service to all who reasonably require it," and "in the case of a municipal utility that jurisdiction is not limited to the boundaries of the municipality but extends to all areas where the utility has undertaken to serve." Id. at 718.