Hawaii Revised Statutes Division 1. Government § 340E-24

(a) Suppliers of water shall notify the department by written communication of any previously undetected chemical contamination of any underground sources of drinking water or other sources of public drinking water supply within seven days of detecting the presence of a contaminant. The written communication shall contain information known to the supplier on the level of detection, location (including depth of the source), date, well construction, and analytical method used, including information on the precision, accuracy, and limit of detection of the method and any quality assurance and control procedures.

(b) The director shall notify the public through the media, and the affected water supplier by written communication, of the presence of any previously undetected chemical contaminant in underground sources of drinking water or in any public water supply within fourteen days of the development of reliable analytical data by the department of health laboratory or receipt of reliable analytical data indicating to the director that the contaminant has been detected by another laboratory.