Section 971 - [Operative 1/1/2025] Bonus Incentive(a) If an urban retail water supplier delivers water from a groundwater basin, reservoir, or other source that is augmented by potable reuse water, the supplier may add a bonus incentive to its objective. The bonus incentive shall be calculated pursuant to subdivision (b), in accordance with one of the following: (1) If the potable reuse water is produced at an existing facility as defined in Water Code section 10609.20(d)(4), the bonus incentive shall not exceed 15 percent of the sum of the budgets described in section 966(c)(1) through (5).(2) For potable reuse water produced at all other facilities, the bonus incentive shall not exceed 10 percent of the sum of the budgets described in section 966(c)(1) through (5).(b) The bonus incentive shall be calculated by multiplying the urban retail water supplier's potable reuse volume (VPR), in gallons, calculated in accordance with any combination of paragraphs (1), (2), or (3), depending on where the potable reuse water is obtained, by the portion of total potable water production (TPW) delivered to residential and landscape irrigation connections (DRLI) for the reporting year. This formula is expressed mathematically as follows: Click here to view image
(1) A supplier shall calculate the volume of potable reuse water obtained from a groundwater source (VPRG) by dividing the product of the loss factor for groundwater recharge and recovery (LFG) and the volume of potable recycled water recharging the groundwater basin (R) by total groundwater basin extractions (VBP). The quotient is then multiplied by the supplier's groundwater basin extraction (VG). The formula is expressed mathematically as follows: Click here to view image
The loss factor for groundwater recharge and recovery (LFG) shall be calculated according to the Department's Recommendations for Bonus Incentive Methods of Calculation and Supporting Data Requirements (published September 22, 2022), which is hereby incorporated by reference, or an alternative method that the supplier has demonstrated to the Department, in coordination with the Board, to be equivalent, or superior, in quality and accuracy.
(2) A supplier shall calculate the volume of potable reuse water obtained from an augmented reservoir source (VPRS) by dividing the product of the loss factor for evaporation and seepage (LFS) and the volume of potable recycled water augmenting the reservoir (A) by the total volume of water produced from the augmented reservoir (VSWP). The quotient is then multiplied by the volume of water the supplier produced from the augmented reservoir (VSW). The formula is expressed mathematically as follows: Click here to view image
(3) A supplier shall calculate the volume of potable reuse water obtained from a Direct Potable Reuse project (VPRD) by multiplying the volume of finished water produced from the DPR project (VFIN-DPR) by the fraction (F) of water the supplier derived from the facility producing the finished water. The formula is expressed mathematically as follows: Click here to view image
Cal. Code Regs. Tit. 23, § 971
Note: Authority cited: Sections 1058 and 10609.20, Water Code. Reference: Article X, Section 2, California Constitution; and Sections 102, 104, 105, 350, 1122, 1123, 1124, 1846, 1846.5, 10608.12, 10609.2, 10609.20 and 10609.21, Water Code.
1. New section filed 9-30-2024; operative 1/1/2025 (Register 2024, No. 40).