(2) The public hearing required under subsection (1) of this section shall be held at a place designated by the board after notice thereof has been given by inclusion of a notice of the public hearing in either the water bills or a special mailing sent to consumers by the district during the period of 30 days prior to the date of the hearing. [1961 c.685 §§2,3; 1969 c.666 §20; 1979 c.328 §5]