WG
WaterGrade

Water Hardness in South Darenth

South Darenth has very hard water at 344 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.

344

mg/l CaCO₃

Very HardUK average: 197.72 mg/l
344
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Very Hard Water Mean?

With a hardness of 344 mg/l, South Darenth 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
South Darenth (SLE33)
Source Type
River
Treatment Works
South Darenth Treatment Works

Full Water Quality Report for South Darenth

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

View →

Frequently Asked Questions

Is water hard in South Darenth?▾
Yes, South Darenth has hard water at 344 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 South Darenth?▾
The water hardness in South Darenth is 344 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 river sources.
Who supplies water to South Darenth?▾
Water in South Darenth is supplied by Thames Water, which covers the London and Thames Valley region. The water is sourced from river abstraction and treated at South Darenth Treatment Works before distribution.
Check another postcode →Browse all hard water areas →