Fluoride
Fluoride is a natural element found in air, soil, fresh water, seawater, plants and lots of foods. Adding fluoride to public water supplies is a proven health measure to reduce tooth decay and strengthen teeth.
We add fluoride to the water supply at the request of the Director General of Health, under the Health (Fluoridation of Drinking Water) Amendment Act 2021. Our current role is to undertake and maintain compliant fluoridation system operations.
The amount of fluoride the Ministry of Health recommends is between 0.7 and 1.0 parts per million in drinking water.
Learn more: Ministry of Health
27 July 2022 - Auckland Council directed to fluoridate Onehunga, Waiuku water supplies
We have been directed by the Director-General of Health Dr Ashley Bloomfield to install fluoride dosing systems at our Onehunga Water Treatment Plant by 30 June 2024. By 30 June 2026, we are required to upgrade our three Waiuku plants and fluoridate the community’s water supply. To read more about this decision, click here.
Chlorine
During the treatment process, chlorine is added to kill any harmful bacteria. Chlorine evaporates quickly and has been used effectively around the world for over 100 years.
Lime
Lime is added to protect the water supply pipes from corrosion.