Decades ago, people can readily drink water from the faucet (yes, really) but as the years go by, it has been discovered that there are many contaminants and even dirt in the water. Buying water filters had been a requirement in most households.
We drink water every day and we are more or less concerned about the potential danger it will bring to our health. There's amoebiasis, diarrhea, and other bacteria that can seep thru the water. It is also a known fact that water pipes are not as reliable as before, hence, the water filters.
For some households who can't afford the expensive water filter or purifying system, they resort to boiling the water, or purchase water from water-refilling stations. Alas, some of this water-refilling stations doesn't really have product registration or updated water certificates. I bet you sometimes encounter that your drinking water has a funny taste, right?
