WG
WaterGrade

Water Hardness in Croydon West Upper

Croydon West Upper has hard water at 255 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.

255

mg/l CaCO₃

HardUK average: 197.72 mg/l
255
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Hard Water Mean?

With a hardness of 255 mg/l, Croydon West Upper has 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
Croydon West Upper (SLW40)
Source Type
River
Treatment Works
Croydon West Upper Treatment Works

Full Water Quality Report for Croydon West Upper

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Frequently Asked Questions

Is water hard in Croydon West Upper?▾
Yes, Croydon West Upper has hard water at 255 mg/l CaCO₃, classified as "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 Croydon West Upper?▾
The water hardness in Croydon West Upper is 255 mg/l CaCO₃ (milligrams per litre of calcium carbonate). This is classified as "Hard" on the standard UK scale and is above the national average of 197.72 mg/l. Water is supplied by Thames Water from river sources.
Who supplies water to Croydon West Upper?▾
Water in Croydon West Upper is supplied by Thames Water, which covers the London and Thames Valley region. The water is sourced from river abstraction and treated at Croydon West Upper Treatment Works before distribution.
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