Every city incorporated under the laws of the territory of Idaho or of the state of Idaho shall have power and authority to issue city coupon bonds in a sufficient amount to acquire, by purchase or otherwise, waterworks plants and water supply, light and power plants, storm sewers and sanitary sewerage systems, and to construct, enlarge, extend, repair, alter and improve such plants or systems notwithstanding the percentage limitation of the previous section. "Waterworks plants and water supply" include by way of example but not by way of limitation, a public water system providing water at any temperature for space heating or cooling, culinary, sanitary, recreational or therapeutic uses.