You can measure water hardness with simple soap tests, commercial test kits or expensive electronic testing machines. Some hardware stores and online retailers, such as, sell test kits. Water may also be acidi... More »

To measure the hardness of water, either titrate a sample of the water with an ethylenediaminetetraacetic acid, or EDTA, solution or use a test strip kit. Hardness refers to the amount of minerals in the water, such as c... More »

The Rockwell Hardness Chart measures the depth of indentation upon application of a total force under a preliminary force to determine the relative hardness of various metals and some plastics. The measurement is relativ... More »

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