One would think that the Philippines, being an archipelagic country with a coastline longer than the continental United States, would not have problems with its potable water supply. But this isn't the case. In a study done by the Asian Development Bank in 2005, Manila's poor spent up to 20% of their income on water peddled by private companies. I really have no idea if this is the case elsewhere in the country but traveling around, it is sometimes exasperating to not trust the tap water for drinking. I'm not normally cautious with drinking tap water but having experienced severe diarrhea (or was it poisoning?) after drinking water in Silay taught me to be more wary.