Is softened water safe to drink, due to the sodium addition? Have been looking but cannot get a definite answer. Is it safe to use boiled softened water? If its unsafe for babies then why should accept it...its the addition of sodium that worries me..
We were advised to keep a hardwater tap in the kitchen and utility to use for drinking and making babies bottles and that the other cold water taps could use the softened supply ie bathroom taps.
Any opinions welcome
The world's number one medical website -
http://www.mayoclinic.com/ - gives a good idea about sodium in softened water.
see - [broken link removed]
They are Americans so they use the "grain" measurement which equals 17.1 mg per grain. So 20 grain hardness which is found commonly in the hardest parts of the country such as the West of Ireland, is about 342 mg per litre.
Softened water has 40% of the sodium of this figure so 137 mg per litre. Tesco bottled still water has 85 mg per litre, and sodium at trace levels is classed at around 100 mg per litre.
Mayoclinic.com quote - "One survey found that, as a general rule, an 8-ounce glass of softened tap water contains less than 12.5 milligrams of sodium. According to the Food and Drug Administration nutrient guidelines, this is in the very low-sodium range."
We require 2400 milligrams of sodium in our diet each day, so the general rule is that one glass of softened water gives around 1/200th of our daily sodium requirement, or we would need to drink around 200 glasses to exceed it.
The EU Directives for sodium in drinking water supplies are based on 200 mg per litre, so softened water in the hardest parts of the country are well below the strictest levels set. Many bottled waters exceed 200 mg per litre, some are over 1000 mg per litre.