Hawaii Revised Statutes Division 1. Government § 54-31

The board of water supply created herein shall be known as the board of water supply of the county in which it is created, and may sue and be sued under this name. Service of process in all matters affecting the board, or any property under its jurisdiction, may be made by service upon any member of the board or on its manager, and by also serving the county. Any action commenced or prosecuted for the recovery of damages for any injury to any person or property by reason of the negligence of the board or of any of its agents, servants, or employees, shall be commenced and prosecuted against the board. No action shall be maintained for the recovery of any damage, unless a written statement verified by the oath of a claimant, setting forth the nature and items of the claim, and the time and place where the alleged injury may have occurred or where the damage was sustained, has been filed with the board within six months after the date of the sustaining of the injury or damage; otherwise there shall be no recovery on the claim.