Item 27 - Water Supply Assessment for Cabrillo Town Center Project

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Cabrillo Town Center WATER SUPPLY ASSESSMENT FEBRUARY 13, 2023 17 than the BPP (i.e., less than 75 percent in the example above), all producers within the Basin pay a replenishment assessment (RA) fess which is used to fund groundwater replenishment and recharge programs aimed at ensuring the long-term viability and stability of the Basin. If groundwater production is greater than the established BPP for that water year (i.e., greater than 75 percent in the example above), the BEA is determined for the producer of that amount of groundwater provided in excess of the BPP. The BEA is an additional fee paid on each AF of water pumped above the BPP, making the total cost of that additional water equal to the higher cost of imported water form Metropolitan. According to OCWD’s Engineer’s Report for fiscal year 2020-21, the actual BPP was 77.1 percent as shown in table 5 below. Total water demands within OCWD were 406,992 AF for the water year (July 1, 2020, to June 30, 2021). Groundwater production for the water year totaled 281,793 AF including any available In-Lieu Program water and excluding Metropolitan Groundwater Storage Program extractions. Groundwater stored in the basin decreased by 48,000 AF. For the water year, the “annual overdraft” (annual basin storage decrease without supplemental replenishment water) was 149,800 AF. The accumulated overdraft was 248,000 AF on June 20, 2021.6 The table below shows the water production data from 2020/21 for the City of Santa Ana. Table 5 City of Santa Ana Groundwater Production 2020-21 Groundwater Supplemental Water (AF)(AF)Actual BPP Groundwater Producer Non- Irrigation Pumping Metropolitan CUP Total Delivery Irrigation Deliveries Total Grand Total Non- Irrigation Only City of Santa Ana 26,104 -26,104 7,738 -7,738 33,842 77.1% Source: OCWD Engineer’s Report, 2020-21 Engineer’s Report on Groundwater Conditions, Water Supply and Basin Utilization in the Orange County Water District, Appendix 1 Over the recent past, production capability of the Basin has increased as a result of increased wastewater reclamation at the Groundwater Replenishment System (GWRS) located in Fountain Valley. The GWRS, which is designed to turn wastewater into drinking water, is one of the most technologically advanced wastewater treatment plants in the world. A treatment plant expansion of 30 million gallons per day was recently put online by OCWD increasing the recharge capacity of the GWRS to 100 million gallons per day. This equates to the recycling of over 110,000 AFY of wastewater back into the Basin for future extraction and potable use. A final expansion of the treatment system is being designed to have a capacity of 130 million 6 OCWD. Engineer’s Report, 2020-21 Engineer’s Report on Groundwater Conditions, Water Supply and Basin Utilization in the Orange County Water District, February 2022.