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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    14] Water can be classified by the level of total dissolved solids (TDS) in the water: Fresh water: TDS is less than 1,000 ppm. Brackish water: TDS = 1,000 to 10,000 ppm. Saline water: TDS = 10,000 to 35,000 ppm. Hypersaline: TDS greater than 35,000 ppm. Drinking water generally has a TDS below 500 ppm. Higher TDS Fresh Water is drinkable but ...

  3. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    This led India's National Green Tribunal to propose a ban on RO water purification systems in areas where the total dissolved solids (TDS) measure in water is less than 500 mg/liter. [ citation needed ] In Delhi , large-scale use of household RO devices has increased the total water demand of the already water-parched National Capital Territory ...

  4. Texas City, Illinois - Wikipedia

    en.wikipedia.org/wiki/Texas_City,_Illinois

    Texas City is an unincorporated community in Rector Township, Saline County, Illinois, United States. Texas City is located at the junction of U.S. Route 45 and County Highway 6 5 miles (8.0 km) north-northeast of Eldorado .

  5. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Alkaline water (above pH 7.0) does not necessarily mean that lead or copper from the plumbing system will not be dissolved into the water. The ability of water to precipitate calcium carbonate to protect metal surfaces and reduce the likelihood of toxic metals being dissolved in water is a function of pH, mineral content, temperature ...

  6. 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.

  7. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including organic and inorganic compounds, dissolved and particulate matter, and ...

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