Within Laos approximately 60-70% of the population are said to be Theravada Buddhists, with the remaining population largely following Animism in the form of spirit (phii) worship.
Laos Population is very diverse as a result of several migrations and international wars. Half of the Population of Laos is consisted of ethnic Lao.
Water purified for drinking purposes is simply called nam deum (drinking water), whether it is boiled or filtered.