The following are declared to be the goals and policies of the state: (1) To preserve and protect water supply watershed lands and prevent degradation of surface water and groundwaters; (2) to protect groundwater recharge areas critical to existing and potential drinking water supplies; (3) to make water resources conservation a priority in all decisions; (4) to conserve water resources through technology, methods and procedures designed to promote efficient use of water and to eliminate the waste of water; (5) to prevent contamination of water supply sources or reduction in the availability of future water supplies; (6) to balance competing and conflicting needs for water equitably and at a reasonable cost to all citizens; and (7) to reduce or eliminate the waste of water through water supply management practices.