Dealkalization of water
Roughly speaking, any acid is equally effective if its pKa lies below the pH 7 you want for a neutral solution.  It does not have to be HCl at all, in fact citric acid works for all three of its commonly observed deprotonations (pKa = 6.4 for the third deprotonation and of course lower for the first two; reference).  So you may use citric acid assuming three equivalents per mole and you should get where you want to go.  

As a matter of taste I prefer citrate in my tea versus chloride, anyway.