2018 GRC HCBA and PCBA Filing In April and July of 2023, Cal Water submitted advice letters to true up the revenue under-collections for the 2022 annual WRAMs/MCBAs of its regulated districts. A net under-collection of $76.6 million is being recovered from customers in the form of 12, 18, and greater-than-18-month surcharges. The new surcharges incorporate net WRAM/MCBA balances that were previously approved for recovery and were implemented on May 5, 2023, except for Kern River Valley's surcharge, which is ...