Fluoride is a trace mineral found naturally in water, soils and foods. It’s added to South Australia’s metropolitan and major country drinking water supplies, as mandated by our state health authority, because its proven to provide a significant public health benefit. Fluoride does not affect the taste, look or smell of your drinking water. All fluoridated drinking water systems are carefully monitored to ensure they pass the Australian Drinking Water Guidelines health limit for fluoride, which is 1.5 milligrams per litre.