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West Molesey Water Hardness & Quality Report (2026)

Water Hardness

very hard

301+ mg/L

Very Hard

estimated · not lab-verified

Source

mixed

pH Level

8.6

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

730.9 mg/L

Est. Daily Cost

£0.85

energy & soap waste

Source: DWI Data Portal · Updated 2026

very hard301+ mg/LVery Hard · est.

0–99

mg/L

Soft

100–149

mg/L

Slightly Hard

150–199

mg/L

Moderately Hard

200–300

mg/L

Hard

300+

mg/L

Very Hard

Appliance Damage Report

In West Molesey, your appliances are currently losing 45% efficiency due to mineral buildup.

ApplianceIn West MoleseySoft Water CityEfficiency Loss
Kettle
4.7 yrs
8.5 yrs-45%
Washing Machine
6.6 yrs
12 yrs-45%
Water Heater
8.3 yrs
15 yrs-45%

Regional Water Comparison

How West Molesey compares to its nearest neighbours

CityHardnessClark°RiskSource
West Molesey, South East≈ 301+ mg/L28.1°🔴 Very Hardmixed
Hampton, Greater London≈ 200–300 mg/L15.9°🟠 Hardmixed
East Molesey, South East≈ 200–300 mg/L16.9°🟠 Hardmixed
Esher, South East≈ 200–300 mg/L15.1°🟠 Hardmixed
Hanworth, Greater London≈ 300+ mg/L15.6°🔴 Very Hardmixed

National Benchmark

How West Molesey compares to the United Kingdom average

BenchmarkHardnessAppliance Risk
West Molesey≈ 301+ mg/L🔴 Very High
United Kingdom National Avg177 mg/L🟡 Moderate
Skipton Top Rated7.1 mg/L🟢 None

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What Makes West Molesey's Water Unique?

Local geology and source profile

Source: MixedTDS: 730.9 mg/LpH: 8.6

Very hard water in this area often results in considerable limescale buildup within appliances like kettles, boilers, and washing machines, as well as showerheads. This accumulation not only diminishes efficiency but also shortens the lifespan of these fixtures. Dishwashers and hot water systems are particularly susceptible to scale, which insulates heating elements and impedes water flow. Homeowners can address this by regularly descaling with solutions like vinegar or citric acid and by fitting limescale filters onto taps. Given the classification of the water as very hard, installing a whole-house water softener is highly recommended to prevent fixture staining, reduce soap scum, and protect appliances from damage.

Geology & Source: Chalk Group aquifer; porous Cretaceous limestone formations like the Newhaven Chalk and Zig Zag Chalk are rich in calcium carbonate, leading to very hard water.

Other South East Water Reports

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Frequently Asked Questions

Is West Molesey's water safe to drink?
Yes. West Molesey's water meets all DWI drinking water standards. The hardness is ≈ 301+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.
Do I need a water softener in West Molesey?
At ≈ 301+ mg/L (Very Hard), West Molesey's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 45%.
How does West Molesey compare to the United Kingdom average?
The United Kingdom national average is 177 mg/L. West Molesey (≈ 301+ mg/L) is 224 mg/L above the national average. The softest major city is Skipton at just 7.1 mg/L.