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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 .
The Philippines' main sources of water are rivers, lakes, river basins, and groundwater reservoirs. The longest and largest river, Cagayan River, discharges approximately 53,943 million cubic meters of water annually. Its groundwater reserves are 47,895 million cubic meters replenished by rainfall and seepage from rivers and lakes.
The history of water filters can be traced to the earliest civilisations with written records. Water filters have been used throughout history to improve the safety and aesthetics of water intended to be used for drinking or bathing. In modern times, they are also widely used in industry and commerce. The history of water filtration is closely ...
Incorporated on January 6, 1997, Manila Water became a publicly listed company on March 18, 2005. It is the east concessionaire of Metropolitan Waterworks and Sewerage System during its privatization on August 1, 1997, with its counterpart Maynilad Water Services, Inc. as the west concessionaire. The 25-year water concession agreement inked ...
The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Astronaut Jack Lousma taking a shower in space, 1974.
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.
Water chlorination as a means of treatment began to be used in the late 19th century. Bleaching powder was the first material used for chlorination. Middelkerke, Belgium, would become the first city to chlorinate its water, in 1902, and Jersey City, New Jersey, became the first in city in the United States to do so, in 1909.
Bottle of NEWater that was given out during NDP 2014. NEWater (pronounced New-Water) is the brand name given to highly treated reclaimed wastewater produced by Singapore's Public Utilities Board. NEWater is produced by further purifying conventionally treated wastewater through microfiltration, reverse osmosis and ultraviolet radiation.