The Sacramento Regional Water Bank is designed as a “reservoir under our feet”, a managed groundwater storage system that uses underground aquifers as long-term water reserves. By leveraging a network of wells, pumps, and pipelines, the Water Bank allows local water providers to store excess surface water (from rivers and rainy periods) underground through “in-lieu recharge,” rather than discharging or letting it go unused. This stored water can then be drawn upon during dry spells or droughts, reducing dependency on surface water supplies and offering a buffer against variable climate conditions.
Beyond just water security, the Water Bank supports climate-resilient water management by balancing human water demand with ecological needs. During wet periods, enabling groundwater recharge helps relieve pressure on rivers and reservoirs, potentially preventing flood overtopping and safeguarding river ecosystems.