Scientists assessed the mineral levels of the different brands, including how much fluoride and calcium they contain, as well as the acidity levels of the water as low pH levels can lead to damaged teeth enamel.
Water scientist Dr Fred Leusch said that a reading of seven is neutral and the lower the reading, the higher the acidity. The lab tests revealed that Pump and Mount Franklin’s sparkling brand had pH levels which would actually cause them to fail against the stringent standards placed on tap water. Pump came in at 4.6 while Mount Franklin’s sparkling water recorded a pH level of 3.7
“Below four is something that does damage your enamel,” said Dr Leusch, as reported by News.com.au. “We’re in the range of Coke and coffee — we know these are not great for our teeth. Tap water should really be marketed as mineral water.”
The programme also revealed that one brand customers are paying out for, Nature’s Best, is actually just treated tap water that has been bottled, despite claiming to be “pure, safe, Australian water”.
Dr Leusch added: “I find the name ironic — Nature’s Best, pure, safe Australian — it’s an acknowledgment that tap water’s safe. In the end, I reckon when you’re buying this, most of the cost is the plastic container. What’s inside is just worth 0.1 of a cent.”