Energy & Green Tech
Researchers at Texas A&M University have come up with an economical, green solution that can help underprivileged communities with their water and electricity needs.
Nov 4, 2020
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15
Robotics
A new high-speed amphibious robot inspired by the movements of cockroaches and lizards, developed by Ben-Gurion University of the Negev (BGU) researchers, swims and runs on top of water at high speeds and crawls on difficult ...
Nov 2, 2020
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17
Engineering
GPS isn't waterproof. The navigation system depends on radio waves, which break down rapidly in liquids, including seawater. To track undersea objects like drones or whales, researchers rely on acoustic signaling. But devices ...
Nov 2, 2020
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643
Security
The president of the International Committee of the Red Cross warned Wednesday that the frequency of sophisticated cyber attacks against hospitals, electricity and water supplies, and other critical civilian infrastructure ...
Aug 27, 2020
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7
Engineering
When engineers develop drinking water systems, they often expect their technology and expertise to work in any context. But project success depends as much on the people and place as on technical design, says Ann-Perry Witmer, ...
Aug 17, 2020
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4
Energy & Green Tech
Reverse osmosis is one of the most common methods for purifying saline water, but the process produces limited results. About 20% to 50% of the water that enters the system remains as a concentrated waste stream.
Aug 6, 2020
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23
Security
Israel's national cyber chief Thursday officially acknowledged the country had thwarted a major cyber attack last month against its water systems, an assault widely attributed to arch-enemy Iran, calling it a "synchronized ...
May 28, 2020
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8
Energy & Green Tech
Irrigation agriculture not only requires a large amount of water but it also uses a significant amount of energy, which in addition to affecting the environment, constitutes a major financial burden for the agricultural sector. ...
May 27, 2020
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7
Engineering
We don't use water like we used to. In recent decades, concerns about cost, water shortages and environmental impacts together with changes in plumbing design have driven down water usage per person. But because plumbing ...
May 12, 2020
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10
Energy & Green Tech
A completely passive solar-powered desalination system developed by researchers at MIT and in China could provide more than 1.5 gallons of fresh drinking water per hour for every square meter of solar collecting area. Such ...
Feb 7, 2020
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2936
Tap water (running water) is part of indoor plumbing, which became available in the late 19th century and common in the mid-20th century.
The provision of tap water requires a massive infrastructure of piping, pumps, and water purification works. The direct cost of the tap water alone, however, is a small fraction of that of bottled water, which can cost from 240 to 10,000 times as much for the same amount.
The availability of clean tap water brings major public health benefits. Usually, the same administration that provides tap water is also responsible for the removal and treatment before discharge or reclamation of wastewater.
In many areas, chemicals containing fluoride are added to the tap water in an effort to improve public dental health. This remains a controversial issue in the health, freedoms and rights of the individual. See water fluoridation controversy.
Tap water may contain various types of natural but relatively harmless contaminants such as scaling agents like calcium carbonate in hard water and metal ions such as magnesium and iron, and odoriferous gases such as hydrogen sulfide. Local geological conditions affecting groundwater are determining factors of the presence of these substances in water.
Occasionally, there are health concerns regarding the leakage of dangerous biological or chemical contaminating agents into local water supplies when people are advised by public health officials not to drink the water, and stick to bottled water instead. An example is the recent discovery of potentially hazardous nitrates in the public water supply in Phoenix, Arizona.
This text uses material from Wikipedia, licensed under CC BY-SA
