Official Supplier Data: Portsmouth Water • DWI & BS 7593 Standards
Water Hardness in PO14
Official water quality verdict for outcode PO14: classified as Hard Water (256 PPM), supplied and treated by Portsmouth Water across 5 sectors.
Rating: Hard Water256 PPM • 17.9° ClarkSupplier: Portsmouth Water+28% above UK average
Outcode Mean Hardness256 PPM17.9° Clark • Hard Water25.6°fH • 14.3°dH
Outcode PO14 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode PO14 is officially classified as hard water, averaging 256 PPM (mg/L CaCO₃) or 17.9° Clark, supplied and treated by Portsmouth Water across all 5 postcode sectors (1,039 postcodes). Readings range from 250 PPM (PO14 1) to 280 PPM (PO14 4), 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+28% Hardervs 200 PPM national average
Serving 1,039 homes and businesses across outcode PO14, mains tap water supplied by Portsmouth Water registers an average mineral density of 256 PPM (25.6°fH / 14.3°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 PO14—there is a 30 PPM variance between neighborhoods. Residents in sector PO14 1 enjoy the softest water at 250 PPM, whereas taps in sector PO14 4 register the highest mineral load at 280 PPM. This localized disparity occurs because Portsmouth 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 PO14 maintains an average mineral density of 256 PPM, ensuring consistent municipal distribution and wholesome tap drinking water from Portsmouth Water.
Hard water in PO14 (256 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 1,039 postcodes.
Estimated Annual Household Financial Impact
Limescale & Appliance Operating Costs in Outcode PO14
Based on 256 PPM mineral saturation (Hard Water), operating heating appliances across PO14's 1,039 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 PO14?
Tap water across outcode PO14 averages 256 PPM (mg/L), which equals 17.9° Clark, 25.6°fH, or 14.3°dH. It is officially classified as hard water water supplied by Portsmouth Water.
Q: Is water in PO14 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 256 PPM, water in outcode PO14 is 28% harder than the national benchmark.
Q: What dishwasher salt setting is recommended for PO14?
For Bosch, Siemens, and Neff dishwashers in outcode PO14 (256 PPM), the recommended softener setting is H04 – H05.
Q: Who manages the municipal water supply in outcode PO14?
Public tap water infrastructure across all 5 sectors in outcode PO14 is distributed and monitored by Portsmouth Water.
All Postcode Sectors in PO14
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.