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Kempston Water Hardness & Quality Report (2026)

Water Hardness

248.5mg/L
Hard

17.4°Clark24.9°fH13.9°dH

Source

mixed

pH Level

8

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

395.5 mg/L

Est. Daily Cost

£0.56

energy & soap waste

Source: DWI Data Portal · Updated 2026

248.5mg/L as CaCO₃Hard

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 Kempston, your appliances are currently losing 33% efficiency due to mineral buildup.

ApplianceIn KempstonSoft Water CityEfficiency Loss
Kettle
5.7 yrs
8.5 yrs-33%
Washing Machine
8 yrs
12 yrs-33%
Water Heater
10 yrs
15 yrs-33%

Regional Water Comparison

How Kempston compares to its nearest neighbours

CityHardnessClark°RiskSource
Kempston, East of England248.5 mg/L17.4°🟠 Hardmixed
Kempston Hardwick, East of England≈ 300+ mg/L17.4°🔴 Very Hardmixed
Bedford, East of England≈ 200–300 mg/L17°🟠 Hardmixed
Ampthill, East of England≈ 300+ mg/L12.2°🔴 Very Hardmixed
Flitwick, East of England≈ 300+ mg/L21.1°🔴 Very Hardmixed

National Benchmark

How Kempston compares to the United Kingdom average

BenchmarkHardnessAppliance Risk
Kempston248.5 mg/L🟠 High
United Kingdom National Avg177 mg/L🟡 Moderate
Skipton Top Rated7.1 mg/L🟢 None

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What Makes Kempston's Water Unique?

Local geology and source profile

Source: MixedTDS: 395.5 mg/LpH: 8

Anglian Water Services supplies Kempston, a community in Bedfordshire within the East of England, drawing primarily from groundwater. Its main sources are boreholes tapping the Chalk aquifer, particularly in the Bedford Ouse Valley. Water undergoes treatment at facilities like the Kempston Water Treatment Works, where processes such as aeration, filtration, chlorination, and fluoridation are employed to meet stringent quality standards. The utility's vast network serves millions across East Anglia and parts of the East Midlands, with Kempston falling under its eastern operational region.

Kempston's water originates from the Cretaceous Chalk Group aquifer, a significant karst system underpinning much of Southeast England. This geological formation, composed of white micritic limestone often containing flint nodules, facilitates rapid water infiltration and the dissolution of minerals. This process, a result of marine sedimentation approximately 100 million years ago, naturally enriches the water with minerals. Unlike regions with softer geology like granite or peat, the soluble carbonate rocks of the Chalk aquifer yield water with a characteristically hard mineral content.

Homeowners in hard water areas like Kempston often notice limescale buildup, which can reduce the efficiency of appliances such as kettles, boilers, washing machines, and showerheads. Even a thin layer of scale, as little as 1.6mm, can decrease efficiency by up to 12%. This buildup also means appliances may require more detergent and energy, potentially leading to costly repairs over time. Simple maintenance, like descaling with vinegar or adding washing soda to laundry, can help. For comprehensive protection throughout the home, installing a water softener is highly recommended to combat scale damage.

Geology & Source: Chalk aquifer; Cretaceous limestone bedrock dissolves calcium and magnesium ions, imparting hard water.

Other East of England Water Reports

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Frequently Asked Questions

Is Kempston's water safe to drink?
Yes. Kempston's water meets all DWI drinking water standards. The hardness is 248.5 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.
Do I need a water softener in Kempston?
At 248.5 mg/L (Hard), Kempston'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 33%.
How does Kempston compare to the United Kingdom average?
The United Kingdom national average is 177 mg/L. Kempston (248.5 mg/L) is 71 mg/L above the national average. The softest major city is Skipton at just 7.1 mg/L.