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Water Hardness in Slough North

Slough North has very hard water at 300 mg/l CaCO₃. This is above the UK national average of 197.72 mg/l. You may notice limescale buildup on taps, in kettles, and around showerheads.

300

mg/l CaCO₃

Very HardUK average: 197.72 mg/l
300
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Very Hard Water Mean?

With a hardness of 300 mg/l, Slough North has very hard water. This level of hardness is common in areas supplied from chalk and limestone aquifers in the South East of England.

You will likely notice white limescale deposits on taps, showerheads, and inside your kettle. Over time, limescale can reduce the efficiency of boilers and heating systems, increasing energy costs. A water softener can help prevent these issues.

Water Supplier

Water Company
Thames Water
Supply Zone
Slough North (SWA12)
Source Type
Groundwater
Treatment Works
Slough North Treatment Works

Full Water Quality Report for Slough North

See all 8 water quality parameters including pH, chlorine, lead, nitrate, fluoride and more.

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Frequently Asked Questions

Is water hard in Slough North?▾
Yes, Slough North has hard water at 300 mg/l CaCO₃, classified as "Very Hard". You will likely notice limescale buildup on taps, in kettles, and around showerheads. A water softener or regular descaling can help manage this.
What is the hardness of water in Slough North?▾
The water hardness in Slough North is 300 mg/l CaCO₃ (milligrams per litre of calcium carbonate). This is classified as "Very Hard" on the standard UK scale and is above the national average of 197.72 mg/l. Water is supplied by Thames Water from underground aquifer sources.
Who supplies water to Slough North?▾
Water in Slough North is supplied by Thames Water, which covers the London and Thames Valley region. The water is sourced from underground aquifers (boreholes) and treated at Slough North Treatment Works before distribution.
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