Pub. Util. Code, § 12801

A district may acquire, construct, own, operate, control, or use, within or without, or partly within or partly without, the district, works or parts of works for supplying the inhabitants of the district and public agencies therein, or some of them, with light, water, power, heat, transportation, telephone service, or other means of communication, or means for the collection, treatment, or disposition of garbage, sewage, or refuse matter, and may do all things necessary or convenient to the full exercise of the powers herein granted. The district may also purchase any of such commodities or services from any other utility district, public agency, person, or private company, and distribute them.