Cal. Water Code § 72740.8

After the consolidation of the improvement districts pursuant to this chapter, all taxes levied for the carrying out of its purpose shall be levied exclusively upon the taxable property in the consolidated improvement district. The taxable property within the boundaries of each participating improvement district shall continue to be taxed for any indebtedness and liabilities of the district contracted for that participating improvement district, to the same extent that the property would be taxable for that purpose if the consolidation had not occurred.