Haw. Rev. Stat. § 54-58

The board of water supply shall maintain proper accounts in such manner as to show the true and complete financial status and the results of management and operation. The accounts shall be kept so as to show all costs of maintenance, extension, and improvement, all operating expenses, all expenses of the board, and the amounts paid or set aside for depreciation, insurance, pensions, interest, sinking funds, and reserves.

All revenues or moneys derived from the waterworks or otherwise appropriated for the board, other than funds derived from the sale of bonds, and excepting moneys appropriated by Act 5 of the Special Session Laws of 1950 for the construction of a water system for the districts of North and South Kona, shall be paid into the treasury of the county and maintained by the treasurer in a waterworks fund. The funds shall be expended for the following purposes:

(1) For payment of interest and sinking fund on all bonds issued for the acquisition or construction of waterworks and extensions thereto;

(2) For the payment of the operating and maintenance expenses of the waterworks, repairs, replacements, additions, and extensions;

(3) For accident reserve, pension charges, and compensation and insurance;

(4) For purchase or development of new sources of water; and

(5) For a reserve fund. [L 1949, c 86, §9; am L 1951, c 171, §1(2); RL 1955, §146-107; HRS §54-58]