We drink and make coffee from only bottled water (ozarka). We use the tank for shower and flushing.....maybe cooking, if boiling is in the recipe.
We do not drink the local water when hooked up at campsite, either.
As such, we fill in the spring, and top it off as needed, from ONLY chlorinated sources; drain for winterization.
No muss, no fuss.
2012 Ecoboost Screw, 3.31 (yes....really) rear end.
2016 Flagstaff 26FKWS, about 7500 loaded
Retired AF Mustang.....Picker always looking to jam.