hard water

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hard water

- That which contains large amounts of minerals.
See also related terms for minerals.

Hard water

Water that contains an appreciable amount of dissolved salts of calcium and magnesium. Such salts interfere with the action of soap. In the early days of the twentieth century, most rural water came from wells, and most of it was hard. Indeed, in some places, it was reputed to be so hard that a rock dropped into the well would bounce when it hit the water. Slight amounts of dissolved material in drinking water were often preferred because of the taste, but soft water was preferred for washing hair and clothes.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hard water - water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap
H2O, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
soft water - water that is not hard (does not contain mineral salts that interfere with the formation of lather with soap)
References in periodicals archive ?
Tenders are invited for Water Hardness Test Kits 500 Tests By Each Set .
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The company warned that the change could see differences in the water hardness which could affect businesses.
Water hardness varies in different geographical locations, but most water tested in the United States has some degree of hardness.
Water hardness results from the solution of carbon dioxide released by bacterial action in the soil in the percolating rainwater.
In the study we found that the surface water sources (lakes, ponds and river water) contained low concentrations of water hardness ranging from 3.
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These include favorable pH (slightly basic) and water hardness (adequate calcium) (Smith 2001).