• What is hard water?
    Update Time 2010-8-3

    Hard water is water that contains dissolved minerals such as calcium, magnesium, iron and manganese. According to the Water Quality Association, water that contains more than 1 GPG (grain per gallon) of these dissolved minerals is considered hard water. Relative levels of hardness have been established:

    • Soft Water - less than 1 GPG
    • Slightly hard - 1 to 3.5 GPG
    • Moderately hard - 3.5 to 7 GPG
    • Hard - 7 to 10.5 GPG
    • Very Hard - 10.5 and higher GPG

    Hard water is probably the most common water problem found in the home. Hard water can leave spots on your glasses and dishes, make laundry dingy and dull, and cause soap scum and scale to build-up around faucets, making cleaning a chore.

    The most common treatment for hard water is with an ion exchange water softener, which removes the dissolved hardness minerals out of the water, creating ?oft?water.