For the chlorine to reach the furthest points of the water system, it may take up to seven days. Chlorine is already used as a disinfectant in the Lower Kula and Makawao water systems. Upcountry customers in Olinda, Lower Kula and Makawao are not affected.
The Maui County Department of Water Supply will switch its water distribution disinfectant from chloramines to chlorine beginning Jan. 10 in an attempt to clear away trace amounts of E. coli from the Upper Kula water system.