There are several substitutional applicable methods to insure the safety of dinking water in places that lack necessary health conditions or where faucets water is not chlorinated. For instance, water can be boiled, chemically sterilized, purified by filtration or simply by drinking bottled water.
In case of visiting such a place, everyone should be aware that this water can not be used in making juice or washing fresh fruits and vegetables and its ice is not usable.

For more information about these methods