(a) A district may include in its purposes and plans all improvements, facilities, plants, equipment, and appliances incident to or helpful or necessary to the collection, transportation, processing, disposal, and control of all domestic, industrial, or communal wastes, whether fluids, solids, or composites, and to gather, conduct, divert, and control local storm water or other local harmful excesses of water.
(b) The district may use any mechanical or chemical means or processes incident, necessary, or helpful to accomplish these purposes, and to conserve and promote the public health and welfare, and to protect, effect, or restore the purity and sanitary condition of the state’s water.