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How hard is your water?

Enter your Eircode and the hardness reading for your supply zone appears straight away, with a plain answer on what that much limescale means for your house.

Check your Eircode

Readings come from Uisce Éireann supply-zone data.

Just the first three characters will do. We don't store your Eircode.

What the reading means

Hardness is measured in milligrams of calcium carbonate per litre of water (mg/L).

SoftUnder 100 mg/L

Little or no scale. You don't need a softener.

Moderate100 to 200 mg/L

Some scale in the kettle and on the taps. A softener is a comfort choice here.

Hard200 to 300 mg/L

Scale builds up in the cylinder, the shower and the appliances. A softener earns its keep.

Very hard300 mg/L and over

Scale is doing damage fast. Worth fitting a softener sooner rather than later.

On a private well? The supply-zone figure doesn't apply to you. Wells vary one to the next and need a lab test: see well water treatment.