Tap Water Filter

[becon776]

or if you really want pure then rent a untility included apartment and set up a distillation unit

 

[fat-tony]

I too used one for a while. I now have and RO/DI unit and measure in and out. TDS going into the unit is only 90. I imagine it would vary for everyone based on what they're starting with.....but I don't think it was really "hurting" me to use that with my 25.