• Hard Water Testing

    Hard Water Testing

    If you are on a municipal water system, the water supplier can tell you the hardness level of the water they deliver. If you have a private water supply, you can have the water tested for hardness.

    As a guide, 60% of the UK population live in a hard water area.

    Most water softener companies will be able to supply you with a free water testing kit.

    Once you’ve tested your water supply, the hardness of your water will be reported in grains per gallon, milligrams per liter (mg/l) or parts per million (ppm). One grain of hardness equals 17.1 mg/l or ppm of hardness.

    Classification mg/l or ppm grains/gal
    Soft 0 – 17.1 0 – 1
    Slightly hard 17.1 – 60 1 – 3.5
    Moderately hard 60 – 120 3.5 – 7.0
    Hard 120 – 180 7.0 – 10.5
    Very Hard 180 & over 10.5 & over