Pleas read this bad anxity about drinking water in asia but don't want to ask and offend?

Water quality is…: Something we generally take for granted in the us (sometimes mistakenly). When travelling to other lands, rely on sealed bottled water/mineral water for drinking, brushing teeth, taking meds, making ice unless staying in 5-star hotels in major cities. Better be safe than have one's trip spoiled by water-borne illness. Can also contact travel medicine docs about water. Rinse fruits & veggies too.