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Dishwasher: hardwater

  • 07-09-2011 11:41pm
    #1
    jaypea1
    Registered Users, Registered Users 2 Posts: 59 ✭✭


    Just want to know if there is any need for dishwasher salt routinely?

    Is the water supply in castleknock, dublin 15 hardwater?


Comments

  • #2
    coylemj
    Registered Users, Registered Users 2 Posts: 25,622 ✭✭✭✭coylemj


    Which co. co. area are you in?

    Fingal co. co. website....

    Water Hardness

    Hardness in water is a measure of the concentration of Calcium Carbonate (CaCO3) in the water. It appears in the form of scaling and deposits in kettles. With high concentrations, there sometimes appears to be an “oily film” on the surface of beverages (tea in particular). This is a thin film of limescale and is harmless.

    The water in most of Fingal originates from the River Liffey and could be considered mildly hard. The water supply in the Balbriggan area of Fingal is supplemented by a ground water scheme that is considered hard water. All water supplied in Fingal complies with the Drinking Water Regulations.

    The following table summarises the various hardness scales that are described in Dishwasher Handbooks and the typical values in different parts of Fingal.

    Hardness Scale Most of Fingal Balbriggan Area
    Mg/l of CaCO3 200 350
    Clarke or English (° eH) 14.6 25.6
    German (° dH) 11.3 19.7
    French (° fH) 20 35
    American (ppm) 200 350


    http://www.fingalcoco.ie/Water/DrinkingWaterQuality/WaterHardness/

    South Dublin co. co. website....

    Water Hardness

    Hardness enquiries usually relate to installation of new dishwashers. As mentioned previously, South Dublin County Council is not a water producer and receives treated water from Dublin City Council and Fingal County Council via water treatment plants at Ballymore Eustace and Leixlip, Co. Kildare. The following figures give total hardness as Calcium Carbonate:

    Ballymore Eustace/Ballyboden/Roundwood/Stillorgan

    mg/L CaCO3 = 50
    eH (Clarke or English Degrees) = 3.5
    dH (German Degrees) = 2.8
    fH (French Degrees) = 5
    Mmol CaCO3 = 0.5
    American Hardness Degrees (ppm) = 50

    Leixlip (North City & County)

    mg/L CaCO3 = 150 - 300
    eH (Clarke or English Degrees) = 10.5 - 21.9
    dH (German Degrees) = 8.4 - 16.8
    fH (French Degrees) = 15 - 30
    Mmol CaCO3 = 1.5 - 3.0
    American Hardness Degrees (ppm) = 150 - 300

    http://environment.southdublin.ie/index.php?option=com_content&task=view&id=144&Itemid=192


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