Official Supplier Data: SES Water • DWI & BS 7593 Standards
Water Hardness in KT24
Official water quality verdict for outcode KT24: classified as Hard Water (275 PPM), supplied and treated by SES Water across 2 sectors.
Rating: Hard Water275 PPM • 19.3° ClarkSupplier: SES Water+38% above UK average
Outcode Mean Hardness275 PPM19.3° Clark • Hard Water27.5°fH • 15.4°dH
Outcode KT24 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode KT24 is officially classified as hard water, averaging 275 PPM (mg/L CaCO₃) or 19.3° Clark, supplied and treated by SES Water across all 2 postcode sectors (388 postcodes). Readings range from 260 PPM (KT24 5) to 290 PPM (KT24 6), showing a local disparity of 30 PPM.
☕ Kettle & Tea Quality:
Rapid limescale buildup in kettles with floating scum on your cuppa. Descale monthly using white vinegar or food-grade citric acid.
🚿 Skin & Bathing:
High calcium levels can aggravate dry skin & eczema sensitivity. Soap lathers less easily, often leaving a tight feeling after hot showers.
🍽️ Appliances & Salt:
Keep water softener salt topped up and calibrate dishwashers to H04 – H05. Protect combi boiler heat exchangers under BS 7593.
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vs. UK Benchmark+38% Hardervs 200 PPM national average
Statistical distribution across all 2 postcode sectors and 388 delivery points under SES Water's catchment monitoring:
Analyzed Sectors2388 postcodes
PPM Spread (Min - Max)260 – 290Variance: 30 PPM
Predominant ZoneHard Water100% hard/very hard
Regulating AuthoritySES WaterDWI Regulated Supply
Hydro Metric
Outcode KT24 Level
UK National Reference
Regional Status
Mean Mineral Density
275 PPM (19.3 °Clark)
200 PPM (14.0 °Clark)
+38% above baseline
French & German Scale
27.5 °fH / 15.4 °dH
20.0 °fH / 11.2 °dH
European standard conversion
Catchment Uniformity
Variable (30 PPM disparity)
Regional blending standard
2 Sub-catchments
Dishwasher Salt Calibration
H04 – H05
Bosch H03 / Beko Level 2
Salt required
Regional Hydro-Geological Overview
Water Hardness Breakdown: Outcode KT24
Serving 388 homes and businesses across outcode KT24, mains tap water supplied by SES Water registers an average mineral density of 275 PPM (27.5°fH / 15.4°dH). Rated as hard water, local water hardness determines how well laundry detergents lather, the rate of scale accumulation in combi boilers, and whether sensitive skin or eczema flares up after showers.
Water hardness isn't identical across every street in KT24—there is a 30 PPM variance between neighborhoods. Residents in sector KT24 5 enjoy the softest water at 260 PPM, whereas taps in sector KT24 6 register the highest mineral load at 290 PPM. This localized disparity occurs because SES Water blends supplies from different boreholes, rivers, and storage reservoirs depending on elevation and seasonal demand.
Treated in strict compliance with Drinking Water Inspectorate (DWI) standards, tap water in KT24 maintains an average mineral density of 275 PPM, ensuring consistent municipal distribution and wholesome tap drinking water from SES Water.
Hard water in KT24 (275 PPM) often causes a cloudy scum on hot drinks and makes soap harder to lather, aggravating dry skin and eczema sensitivity after hot baths. For appliances, ensure regular water softener salt top-ups and calibrate your dishwasher to H04 – H05 to avoid cloudy glassware, white streaks, and heating element burnout across all 388 postcodes.
Estimated Annual Household Financial Impact
Limescale & Appliance Operating Costs in Outcode KT24
Based on 275 PPM mineral saturation (Hard Water), operating heating appliances across KT24's 388 households carries distinct annual economic consequences:
Extra Combi Boiler Gas Cost£130 – £190
Thermal heating transfer resistance caused by 1mm–1.5mm calcium carbonate build-up on heat exchangers.
Dishwasher Salt Requirement10 – 14 kg
Essential ion-exchange resin bed regeneration salt required to avoid glass clouding and element burnout.
Q: What is the average water hardness in outcode KT24?
Tap water across outcode KT24 averages 275 PPM (mg/L), which equals 19.3° Clark, 27.5°fH, or 15.4°dH. It is officially classified as hard water water supplied by SES Water.
Q: Is water in KT24 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 275 PPM, water in outcode KT24 is 38% harder than the national benchmark.
Q: What dishwasher salt setting is recommended for KT24?
For Bosch, Siemens, and Neff dishwashers in outcode KT24 (275 PPM), the recommended softener setting is H04 – H05.
Q: Who manages the municipal water supply in outcode KT24?
Public tap water infrastructure across all 2 sectors in outcode KT24 is distributed and monitored by SES Water.
All Postcode Sectors in KT24
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.