As noted above, Phase 1 of the project is estimated to increase the total groundwater basin water supply by approximately 900-1,000 AF per year. Under the Cost Sharing Agreement, the City of Grover Beach will be allocated 36% of that additional water supply, or approximately 324-360 AF per year.
The project will also enhance access to existing groundwater supplies. Grover Beach, Arroyo Grande, Pismo Beach, and Oceano have reduced groundwater pumping to 25% of their entitlements to mitigate the threat of seawater intrusion. The Central Coast Blue injection wells will create a seawater intrusion barrier that will allow current groundwater pumping rates to be increased. The total water supply benefit to Grover Beach from the project is approximately 500 AF per year including new Central Coast Blue water supply and increased access to existing groundwater.