Is Belfast a hard water area?

No. Tap water across the BT postcode area is soft, so limescale is not a problem here, with a median of 42 mg/L calcium carbonate. It ranges from 8 mg/L in BT81 to 71 mg/L in BT39, from 75 districts with their own water company reading and 5 estimated from the area.

Hardness by BT district

Hardest first. Hard starts at 180 mg/L, very hard at 250. Districts marked with an asterisk take the area's median rather than a reading of their own.

Check your exact postcode

The area figure is a median. Your district can sit anywhere between 8 and 71 mg/L.

Nearby areas

• Kilmarnock 41
• Paisley 26
• Dumfries 56
• Glasgow 16
• Motherwell 32
• Carlisle 8

Is Belfast a hard water area?

No. The median hardness across BT postcode districts is 42 mg/L calcium carbonate, which is soft. 0% of the 80 districts we hold readings for are hard or very hard (180 mg/L and above).

What is the water hardness in Belfast?

Between 8 and 71 mg/L depending on the district, with a median of 42. The hardest measured district is BT39 at 71 mg/L and the softest is BT81 at 8. Figures come from water company drinking-water tests, with postcode-area estimates for districts that have no reading of their own.

Do I need a water softener in Belfast?

Usually not. At a median of 42 mg/L limescale is a minor issue in Belfast. A filter jug or a shower filter covers the everyday effects. Only districts at 180 mg/L or above are worth a softener quote.

Hardness as mg/L calcium carbonate from water company drinking-water tests and postcode checkers. See the UK hardness map for every area.