Where do you get that from? No, it
is the amount of minerals you are recommended to get during one day, no matter the source.
And for Na the recommended ammount is 1.5 g (from D-A-CH)
But in the example linked above, 1 l of the water gives 118 mg of Na, so 13 l of water would be needed to get the required Na amount. Not practical, but most mineral waters actually come rather with an artifically reduced amount of Na. Natural sources probably have higher values.
But in
