My water tested positive for hardness. What are the health effects associated with hard water?
Hard water is not known to cause any adverse health effects. However, relatively softer water enhances consumer acceptability. Hardness is primarily caused by the presence of calcium and magnesium in the water. There is no well-defined distinction between hard water and soft water. In general, hardness values of less than 75 mg/L as calcium carbonate (CaCO3) represent soft water, and values above 150 mg/L CaCO3 represent hard water (Enhanced Coagulation and Enhanced Precipitative Softening Guidance Manual, EPA815-R-99-012, May 1999).
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