hard water


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Related to hard water: water softener

hard wa·ter

water containing ions, such as Mg2+ and Ca2+, that form insoluble salts with fatty acids so that ordinary soap will not lather in it.
Water with a high content of calcium and magnesium salts—e.g., carbonates and sulphates—which may interfere with certain lab tests

hard water

Water with a high content of calcium and magnesium salts–eg, carbonates and sulfates, which may interfere with certain lab tests. See Mineral water, Spring water; Cf Soft water.

hard wa·ter

(hahrd wawtĕr)
That containing ions, such as Mg2+ and Ca2+, which form insoluble salts with fatty acids so that ordinary soap will not lather in it.
References in periodicals archive ?
may water study, from "I"By damaging the skin barrier, washing with hard water nay contribute to the development of eczema.
hard water and hair and the sampling technique used was non-probability, purposive, Randomized Control Trial (RCT).
In soft, moderately hard, and hard water, the proportion of silver in the ionic fraction, which is considered the most bioavailable, was likely reduced below that causing a toxic effect.
Marcus: The minerals in hard water can interfere with soap's ability to clean and to get foamy.
Apartment owners who deal with hard water know how quickly sediment can ruin a water heater.
Water heaters then needed to be replaced every three years and other appliances were being ruined by the hard water, he said.
The minerals in especially hard water can clog it or attack the metal parts, resulting in valve failure.
It is due to hard water in the Midlands, as not all comes from Wales.
The Flash--Jay Garrick became the fastest man alive after inhaling the vapors from 'hard water' (I don't know what that means either, I don't think anyone does).
The copper content of most of the world's natural water supplies does not exceed more than a few milligrams per liter, although concentrations can be higher in well water and in hard water delivered through newly installed copper pipes.