SAO PAULO, Dec 18 (Reuters) - Brazilian water utility Sabesp said on Monday its board of directors has approved an investment plan totaling 47.4 billion reais ($9.59 billion) for the 2024-2028 period, including 8.13 billion next year.

Sabesp is controlled by the state of Sao Paulo but the local government has recently begun a process to privatize the firm, which said in a securities filing that the investment plan does not factor in the effects of its potential privatization.

($1 = 4.9424 reais) (Reporting by Gabriel Araujo; editing by Jason Neely)