Water Hardness in Welwyn Garden City

Welwyn Garden City has very hard water at 320 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.

320

mg/l CaCO₃

Very HardUK average: 197.72 mg/l
320
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Very Hard Water Mean?

With a hardness of 320 mg/l, Welwyn Garden City 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
Affinity Water
Supply Zone
Welwyn Garden City (AF020)
Source Type
Groundwater
Treatment Works
Welwyn Garden City Treatment Works

Full Water Quality Report for Welwyn Garden City

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Frequently Asked Questions

Is water hard in Welwyn Garden City?
Yes, Welwyn Garden City has hard water at 320 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 Welwyn Garden City?
The water hardness in Welwyn Garden City is 320 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 Affinity Water from underground aquifer sources.
Who supplies water to Welwyn Garden City?
Water in Welwyn Garden City is supplied by Affinity Water, which covers the South East England region. The water is sourced from underground aquifers (boreholes) and treated at Welwyn Garden City Treatment Works before distribution.
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