Laserfiche WebLink
4`n AND CABRILLO <br />WATER SUPPLY ASSESSMENT AUGUST 21, 2020 <br />successfully manages the OC Basin to meet these new groundwater monitoring and <br />management requirements. <br />OCWD manages the Basin through the Basin Production Percentage (BPP) which is determined <br />each water year. The BPP is set based on groundwater conditions, availability of imported water <br />supplies, water year precipitation, SAR runoff, and basin management objectives. The BPP <br />represents an established percentage identifying the amount of groundwater all pumpers in the <br />Basin can pump without paying a "pumping tax' or Basin Equity Assessment (BEA) to OCWD. <br />For example, if the BPP is setto 75%, all pumpers within the Basin, including the City, can supply <br />75% of their water needs from groundwater supplies at a cost significantly less than the cost of <br />imported water. If groundwater production is equal to or less than the BPP (i.e. less than 75% <br />in the example above), all producers within the Basin pay a replenishment assessment (RA) fee <br />which is used to fund groundwater replenishment and recharge programs aimed at ensuring <br />the long-term viability and stability of the Basin. If groundwater production is greater than the <br />established BPP for that water year (i.e. greater than 75% in the example above), the BEA is <br />determined for the producer of that amount of groundwater provided in excess of the BPP. The <br />BEA is an additional fee paid on each AF of water pumped above the BPP, making the total <br />cost of that additional water equal to the higher cost of imported water from Metropolitan. <br />According to OCWD's Engineer's Report for fiscal year 201 7/18, the actual BPP was 75% as <br />shown in Table 5 below. Total water demands within OCWD were 419,477 AF for the water <br />year (July 1, 2017 to June 30, 2018). Groundwater production for the water year totaled <br />310,025 AF including any available In -Lieu Program water and excluding Metropolitan <br />Groundwater Storage Program extractions. Groundwater stored in the basin increased by <br />51,000 AF. For the water year, the "annual overdraft" (annual basin storage decrease without <br />supplemental replenishment water) was 195,000 AF. The accumulated overdraft was 277,000 <br />AF on June 30, 2018. .5 The table below shows the water production data from 2017118 for <br />the City of Santa Ana. <br />Table 5 City of Santa Ana Groundwater Production Data 2017-18 <br />Groundwater <br />Supplemental Water (AF) <br />Actual <br />Groundwater <br />BPP <br />Producer <br />Non- Metropolitan <br />Irrigation Total <br />Conservation <br />Delivery Total <br />Grand <br />Non - <br />Irrigation <br />CUP <br />Pumping <br />Credit <br />Total <br />Only <br />City of Santa <br />Ana <br />21,327 <br />4,378 <br />25,705 <br />9,265 <br />83 <br />9,348 <br />35,054 <br />73.3% <br />Source: OCWD 2017-18 Engineer's Report <br />Over the recent past, production capability of the Basin has increased as a result of increased <br />wastewater reclamation at the Groundwater Replenishment System (GWRS) located in Fountain <br />Valley. The GWRS, which is designed to turn wastewater into drinking water, is one of the most <br />technologically advanced wastewater treatment plants in the world. A treatment plant expansion <br />of 30 million gallons per day was recently put on line by OCWD increasing the recharge <br />capacity of the GWRS to 100 million gallons per day. This equates to the recycling of over <br />110,000 AFY of wastewater back into the Basin for future extraction and potable use. A final <br />5 OCWD. Engineer's Report, 2017/18, April 2019, <br />FUSCOE ENGINEERING, INC. 15 <br />