Cal. Health & Safety Code § 4740

The district may acquire by gift, purchase, condemnation, or otherwise, in the name of the district, and own, control, manage, and dispose of any interest in real or personal property necessary or convenient for the construction, maintenance, and operation of a sewerage system and sewage disposal or treatment plant, or a refuse transfer or disposal system, or both. As used in this article “refuse” shall include all of the following: (a) animal, fruit and vegetable refuse; (b) offal; (c) leaves and cuttings, trimmings from trees, shrubs and grass; (d) inorganic refuse and rubbish; (e) garbage; (f) anything thrown away as worthless.