Whole House Water Filtration
The provision of clean water is an important issue to solve and there is no one solution, thankfully. Different areas have different problems and resources and no one solution can be applied to all. In developed countries, water is often pumped from a nearby lake or from groundwater and extensively treated in several stages in large plants to ensure safety. Water is commonly filtrated, sometimes in several stages with chemicals added to completely eliminate the smallest particles of pollutants and to speed up the process. Chemicals are then filtered out again. Filtration in various forms is so far the only method to clean water, apart from UV-purification, whether it be a traditional slow sand filter or a reverse osmosis system or a modern, large scale filter in a water-purification plant. In developing countries such large-scale infrastructure does not exist, thus polluted water is a big problem. Charities are very active in combating this problem, especially in rural areas, helping villages to install sanitation facilities and groundwater pumps or water purification technology. The focus of this paper will be on smaller, household systems for purifying water, looking at existing appropriate technology for purifying water in developing countries, with a special focus on Zambia in sub-saharan Africa. Background is also provided on water, the diseases associated with unsafe water and their effect on a population.