Based on the research carried out by the World Health Organization in 2007, nearly 1 billion people do not have access to a proper drinking water supply. Nearly 88% of the 4 billion cases annually of diarrhea results from unsafe drinking water. Around 1 million people die of diarrheal disease in a year. WHO itself suggests that 90% of the diarrheal diseases can be prevented if simple techniques of filtration such as chlorination and distillation are used for treating of unsafe water.

Water filtration is a general term used for the process of removal/reduction and filtering out the particles and matter such as bacteria, algae, and fungi as well as some other undesirable contaminants from the water. The main aim of water filtration is to have clean and safe water for purposes like drinking, pharmaceutical, and medical uses. There are various ways by which water can be filtered. It can be filtered by a physical process such as distillation, sedimentation, and filtration, by chemical processes such as chlorination and flocculation, by biological processes such as active carbon and sand filters and by electromagnetic processes such as by using Ultraviolet light.

There are various filters which are available in the market for water purification. They all have different mechanisms as well as different functions but all have one common aim - provision of clean and healthy water supply. Let's see some of the commonly used filters with their short description:

The decision to buy which type of water filter fully depends upon the condition and the use of water. To help and evaluate with your choices,
consulting a local water expert will be the best for this purpose.