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  2. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_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. Drinking hard water may have moderate health benefits. It can pose critical problems in industrial settings, where water hardness is monitored to avoid costly ...

  3. Water quality - Wikipedia

    en.wikipedia.org/wiki/Water_quality

    The most familiar of these is probably the presence of calcium (Ca 2+) and magnesium (Mg 2+) that interfere with the cleaning action of soap, and can form hard sulfate and soft carbonate deposits in water heaters or boilers. [13] Hard water may be softened to remove these ions. The softening process often substitutes sodium cations. [14]

  4. Scientists Urgently Warn: Stop Drinking Bottled Water - AOL

    www.aol.com/scientists-urgently-warn-stop...

    1. It's Typically Worse Than Tap Water. Bottled water, believe it or not, isn't held to the same standards as tap water. That means harmful chemicals can leach from the bottle, especially if it ...

  5. Drinking water quality standards - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality...

    Drinking water quality standards describes the quality parameters set for drinking water. Water may contain many harmful constituents, yet there are no universally recognized and accepted international standards for drinking water. Even where standards do exist, the permitted concentration of individual constituents may vary by as much as ten ...

  6. Fluoride toxicity - Wikipedia

    en.wikipedia.org/wiki/Fluoride_toxicity

    In soft waters with low ionic content, invertebrates and fishes may develop adverse effects from fluoride concentration as low as 0.5 mg/L. Negative effects are less in hard waters and seawaters, as the bioavailability of fluoride ions is reduced with increasing water hardness [33] Seawater contains fluoride at a concentration of 1.3 mg/L. [34]

  7. Does a glass of water ever go bad? Experts weigh in. - AOL

    www.aol.com/lifestyle/does-glass-water-ever-bad...

    An individual’s water needs depend on many factors, including age, sex, weight, if you’re pregnant or breastfeeding, how much activity you do each day and your overall health status.

  8. Is Sparkling Water Good or Bad for You? We Finally Have ... - AOL

    www.aol.com/lifestyle/sparkling-water-good-bad...

    If you enjoy carbonated water, you may be wondering if sparkling water is good for you. We asked registered dietitians to break down the pros and cons.

  9. Sulfur water - Wikipedia

    en.wikipedia.org/wiki/Sulfur_water

    Sulfur water is made out of dissolved minerals that contain sulfate. These include baryte (BaSO 4), epsomite (MgSO 4 7H 2 O) and gypsum (CaSO 4 2H 2 0). [1] It is reported that a notable change in taste to the water is found dependent upon the type of sulfate affecting the water.

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