California Water Service (CWT) has been authorized to implement interim rate adjustments for nearly all of its service areas, effective Jan. 1, 2026, as the California Public Utilities Commission continues its review of the utility’s 2024 General Rate Case and Infrastructure Improvement Plan. The CPUC’s approval allows Cal Water to temporarily increase rates by 3% in most districts. Cal Water, the largest subsidiary of California Water Service Group, filed its triennial, required GRC and Infrastructure Improvement Plan in July 2024. According to the CPUC’s 18-month GRC cycle, any changes in rates determined by the CPUC for the period of 2026 through 2028 were to take effect Jan. 1, 2026.
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