A good water filter is essential to a healthy lifestyle, drinking water all over the planet is contaminated, in the developing world by bacteria, water borne virus and heavy metals and in the developed world by heavy metals and then with chlorine to ‘purify’ it.
You should really consider investing in a water purifier for your health, but not all water filters are equal, for example an osmosis filter wastes around 6 liters of water to purify 1 liter of drinking water.
Check out the Kenrico water filter to see how water filters should be made.