Carbon dioxide in the air goes into solution and makes the water slightly more acidic. This extra acid is what gives what we call stale or flat water the sour taste. It’s still perfectly safe. We deliberately put CO2 into water to make soda or seltzer but in the case of soda there’s a fuckton of sugar or something sweet to overpower the sour taste. There’s no really way to get around it apart from aerating the water somehow. The turbulence will get the CO2 out of the solution and displace it with oxygen.
Latest Answers