Verkar som man tar bort dessa giftiga ämnen som finns i kranvattnet genom att koka det.
Däremot säger en del att man med fördel skall dricka ljummet vatten- svalnat te ungefär.
Citat:
Drinking hot water regularly is a classical Ayurvedic recommendation for balancing vata and kapha dosha, strengthening digestive power, and reducing metabolic waste (ama) that may have accumulated. Boil a sufficient amount of unchlorinated tap water or (better still) mineral water in an open saucepan, for at least ten minutes. Keep this water in a thermos flask and take a few sips (or more, if you are thirsty) every half-hour throughout the day. It is the frequency rather than the quantity that is important here. To increase the positive effect you can add 1-2 slices of fresh ginger (or a pinch of ginger powder) to the water when boiling it.
http://www.itmonline.org/arts/water.htm