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  2. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    A bathtub faucet with built-up calcification from hard water in Southern Arizona. Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.

  3. Wiley, Colorado - Wikipedia

    en.wikipedia.org/wiki/Wiley,_Colorado

    Wiley, Colorado. Town. Wiley from the east (2013) Location with Prowers County and Colorado. ... • Water: 0 sq mi (0 km 2) Elevation [2] 3,740 ft (1,140 m) Population

  4. dGH - Wikipedia

    en.wikipedia.org/wiki/DGH

    Degrees of general hardness (dGH or °GH) is a unit of water hardness, specifically of general hardness. General hardness is a measure of the concentration of divalent metal ions such as calcium (Ca 2+) and magnesium (Mg 2+) per volume of water. Specifically, 1 dGH is defined as 10 milligrams (mg) of calcium oxide (CaO) per litre of

  5. Grain (unit) - Wikipedia

    en.wikipedia.org/wiki/Grain_(unit)

    [14] [15] Otherwise, water hardness is measured in the dimensionless unit of parts per million (ppm), numerically equivalent to concentration measured in milligrams per litre. [14] [15] One grain per U.S. gallon is approximately 17.1 ppm. [14] [note 1] Soft water contains 1–4 gpg of calcium carbonate equivalents, while hard water contains 11 ...

  6. Water in Colorado - Wikipedia

    en.wikipedia.org/wiki/Water_in_Colorado

    Water in Colorado is of significant importance, as the American state of Colorado is the 7th-driest state in America. [1] As result, water rights generate conflict (for example, see Colorado River Water Conservation District v. United States), with many water lawyers in the state.

  7. Category:Water in Colorado - Wikipedia

    en.wikipedia.org/wiki/Category:Water_in_Colorado

    Pages in category "Water in Colorado" The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes. ...

  8. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

  9. Carbonate hardness - Wikipedia

    en.wikipedia.org/wiki/Carbonate_hardness

    Carbonate hardness, is a measure of the water hardness caused by the presence of carbonate (CO 2− 3) and bicarbonate (HCO − 3) anions. Carbonate hardness is usually expressed either in degrees KH (from the German "Karbonathärte"), or in parts per million calcium carbonate ( ppm CaCO 3 or grams CaCO 3 per litre|mg/L).

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