Hi,
I Googled the question as to whether drinking about 2 liters of plain Soda Water and now Sodium Free (not true but lower) was harmful and one of my choices was this site.
The answers posted seemed to be more geared to flavoured soda rather than just plain soda water or Club Soda, (which as it turns out there's no such thing)
The generic soda water I've been drinking has 63 mg of sodium per cup. The so caled Sodium Free water has 12mg of Sodium and 9mg of Potassium (which I thought might be good)
Anyway I've never been a huge consumer of sugered soda and I have generally 2 cups of coffee a day. I do however, have Soda water with me where ever I go and drink it all the time. I do not drink alcoholic beverages if some were curious.
So, is it bad for me or good for me or it's a non issue.