hard water


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Related to hard water: water softener

hard water

[′härd ¦wȯd·ər]
(chemistry)
Water that contains certain salts, such as those of calcium or magnesium, which form insoluble deposits in boilers and form precipitates with soap.

hard water

Water containing solutions of mineral salts (sulfates of calcium and magnesium, carbonates, and bicarbonates). Also see water softener.
References in periodicals archive ?
He said: "This new study reveals the mechanism by which calcium and magnesium ions in hard water, surfactants, and filaggrin interact to damage the skin barrier unlocking new information about how exposure to hard water could potentially contribute to the development of eczema.
Poor color fastness properties were achieved using Fe salt hard water and presence of Fe is deleterious for level dyeing of any color and shade.
8 Generally there are no harmful effects of hard water on one's health rather it has more useful effects as it acts as a good source of calcium and magnesium.
2008) reported a higher rate of silver accumulation in the fish, Pimephales promelas, when the fish was previously acclimated to soft water, as compared to moderately hard water.
People's appliances are being destroyed by the hard water GERRY MCMONAGLE letterkenny yesterday
Dennis Griesing, vice president of government affairs for the American Cleaning Institute, told the Associated Press that low-phosphate products made then didn't work as well in hard water, but he said new formulations are now available that do a better job.
My hair doesn't react well to the hard water there.
ACID Magic is a direct replacement for muriatic and other products as well, and can be used for etching concrete, cleaning masonry, removing hard water and calcium buildup, and even as a pH down for pools and spas.
Trim C276 synthetic coolant and SC536 low-oil semi-synthetic coolant have been reformulated to prevent hard water soap residue forming on parts, chips, and machine surfaces.
Water heaters then needed to be replaced every three years and other appliances were being ruined by the hard water, he said.