Copper
If there’s copper in drinking water it’s most likely from corrosion of pipes and fittings. At levels higher than 1 milligram per litre it may stain your taps and fittings, more than 2 milligrams could cause health issues in some people, and at 3 milligrams per litre it can change the taste of the water slightly. All South Australia’s drinking waters consistently pass the Australian Drinking Water Guidelines limits for copper, which is 2 milligram per litre for health and 1 milligrams per litre for aesthetics.
