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  2. History of water filters - Wikipedia

    en.wikipedia.org/wiki/History_of_water_filters

    Ancient India and Egypt. Ancient Sanskrit and Egyptian writings document practices that were followed to keep water pure for drinking. The Sushruta Samhita (3rd or 4th century CE) specified various methods, including: boiling and heating under the sun. The text also recommends filtering water through sand and coarse gravel.

  3. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools.

  4. Water supply and sanitation in India - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    In India, Delhi has the highest usage of household water purifiers/filters. Basic gravity water filter, electric reverse osmosis and ultraviolet filters visible. Standard 20l bottled water visible. The supply of cities that depend on surface water is threatened by pollution, increasing water scarcity and conflicts among users.

  5. Ceramic water filter - Wikipedia

    en.wikipedia.org/wiki/Ceramic_water_filter

    A Victorian ceramic water filter. Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, and portable ceramic filters are commonly used in backpacking.

  6. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of ...

  7. Water scarcity in India - Wikipedia

    en.wikipedia.org/wiki/Water_scarcity_in_India

    Water scarcity in India is an ongoing water crisis that affects nearly hundreds of million of people each year. [1] In addition to affecting the huge rural and urban population, the water scarcity in India also extensively affects the ecosystem and agriculture. India has only 4% of the world's fresh water resources despite a population of over ...