Irish Water's chairperson Rose Hynes is expected to survive the cull of the board at the utility company.
A new board combining Irish Water with its parent company, Ervia, formerly known as Bord Gais, will be appointed soon.
Several members of the existing board are expected to be dropped with "fresh blood" being introduced.
Ms Hynes (inset) has been chair of the board of Irish Water through the semi-state's troubled opening period.
She was appointed as chair in July 2013 and has served as chair of the Bord Gais since July 2009.
Originally from Clare, but living in Limerick, the lawyer is regarded as being highly trusted by Finance Minister Michael Noonan.
Ms Hynes is also the chair of Shannon Airport Authority. She has a wide range of experience.
Government sources say the new board will have "fresh blood" but Ms Hynes will remain, most likely as chair.
"There will be some continuity. She is already chair of both organisations," a source said.