The bill requires chlorination for all reticulated supplies unless an exemption is obtained from the chief executive of Taumata Arowai. This reflects recommendations made by the inquiry into Havelock North's drinking water. Some submissions raised safety concerns about small suppliers handling chlorine. The committee responded to these submissions by allowing Taumata Arowai to exempt classes of suppliers from residual disinfection, such as very small suppliers. This is, again, another welcome addition to the bill.