Water Hardness - an overview

 

Water hardness refers to the amount of dissolved minerals, specifically calcium and magnesium, present in water. Hard water contains high levels of these minerals, while soft water contains very little. The hardness level is usually expressed in milligrams per litre (mg/L).

Water picks up these minerals as it flows through soil and rock. Hardness levels can vary dramatically depending on the geology of the area. Groundwater tends to be harder than surface water. Additionally, water hardness tends to be higher in areas with limestone bedrock and lower in areas with granite bedrock Click Here hot water cylinder nz.

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