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  2. Portable water purification - Wikipedia

    en.wikipedia.org/wiki/Portable_water_purification

    The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

  3. Solar water disinfection - Wikipedia

    en.wikipedia.org/wiki/Solar_water_disinfection

    Solar water disinfection, in short SODIS, is a type of portable water purification that uses solar energy to make biologically-contaminated (e.g. bacteria, viruses, protozoa and worms) water safe to drink. Water contaminated with non-biological agents such as toxic chemicals or heavy metals require additional steps to make the water safe to drink.

  4. Tata Swach - Wikipedia

    en.wikipedia.org/wiki/Tata_Swach

    The Swach can purify water at the rate of about 3 to 4 litres (0.79 to 1.06 US gal; 0.66 to 0.88 imp gal) every hour. [6] The purifier consists of two parts; an upper reservoir where the untreated water enters and a lower middle portion with a bulb to which the cartridge can be attached.

  5. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Household RO units use a lot of water because they have low back pressure. Household RO water purifiers typically produce one liter of usable water and 3-25 liters of wastewater. [33] The remainder is discharged, usually into the drain. Because wastewater carries the rejected contaminants, recovering this water is not practical for household ...

  6. Water supply and sanitation in Ethiopia - Wikipedia

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

    In the small town of Wukro (50,000 residents), the water utility uses an increasing block tariff with a fixed charge to calculate customers' water bills. The mean average price households pay for water from the utility was 6.5 Ethiopian birr per m 3 in 2022 (or 0.12 USD with October 2023 exchange rate). Because the utility does not provide 24 ...

  7. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Bringing water to its boiling point (about 100 °C or 212 F at sea level), is the oldest and most effective way since it eliminates most microbes causing intestinal disease, [19] but it cannot remove chemical toxins or impurities. [20]

  8. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    The first continuously operating slow sand filter was designed by Allen Hazen for the city of Albany, New York in 1897. [20] The most comprehensive history of water filtration was published by Moses N. Baker in 1948 and reprinted in 1981.

  9. Water pricing - Wikipedia

    en.wikipedia.org/wiki/Water_pricing

    Retail prices vary widely between countries, brands, bottle sizes (0.33 liter to 20 liters) and place of sale (supermarket, fair, restaurant etc.). They range from US$0.05 to US$6 per liter, equivalent to US$50 to US$6,000 per cubic meter .

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