My question is regarding carbonated water (aka soda water, aka sparking water) - in my case, specifically from a Sodastream:

![SodaStream][1]

I drink a fair amount of this daily, as I find it an easy way to make sure I stay adequately hydrated.

I have been told that the CO2 dissolved in this can attack your teeth enamel, due to carbonic acid production, causing damage to your teeth.

My question is - is there any evidence on the severity of this problem? Is it severe enough that you would be concerned about drinking carbonated water? How does the water from a SodaStream compare to the sparkling water you buy in restaurants (e.g. Pellegrino's?)

Should there be some kind of warning on carbonated water, or a daily limit? (e.g. like for chewing gum, and a laxative effect).

Wikipedia states that the pH of carbonate water is between 3 and 4 - I haven't tested this myself on the SodaStream output, but I could get pH test strips if people think that might be helpful. I have no idea what the molarity of the output solution is though.

I know there are other questions asking about flavoured sodas (e.g. http://skeptics.stackexchange.com/questions/6191/does-diet-soda-cause-tooth-decay), however, my question is about unsweetened and unflavoured tap water, that has been carbonated with CO2.

  [1]: https://i.sstatic.net/cwXO2.jpg