Official Supplier Data: Dŵr Cymru Welsh Water • DWI & BS 7593 Standards
Water Hardness in SA19
Official water quality verdict for outcode SA19: classified as Soft Water (64 PPM), supplied and treated by Dŵr Cymru Welsh Water across 5 sectors.
Rating: Soft Water64 PPM • 4.5° ClarkSupplier: Dŵr Cymru Welsh Water-68% below UK average
Outcode Mean Hardness64 PPM4.5° Clark • Soft Water6.4°fH • 3.6°dH
Outcode SA19 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode SA19 is officially classified as soft water, averaging 64 PPM (mg/L CaCO₃) or 4.5° Clark, supplied and treated by Dŵr Cymru Welsh Water across all 5 postcode sectors (827 postcodes). Readings range from 45 PPM (SA19 0) to 140 PPM (SA19 8), showing a local disparity of 95 PPM.
☕ Kettle & Tea Quality:
Naturally soft water leaves kettles clear of mineral furring. Your tea brews bright and clean with zero tea scum.
🚿 Skin & Bathing:
Gentle on sensitive skin and eczema-prone households. Soaps lather richly with small amounts of product.
🍽️ Appliances & Salt:
Dishwasher salt top-up is optional or minimal (setting H00 (No salt required)). Boilers operate at peak thermal efficiency without scale.
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vs. UK Benchmark-68% Softervs 200 PPM national average
Statistical distribution across all 5 postcode sectors and 827 delivery points under Dŵr Cymru Welsh Water's catchment monitoring:
Analyzed Sectors5827 postcodes
PPM Spread (Min - Max)45 – 140Variance: 95 PPM
Predominant ZoneSoft Water0% hard/very hard
Regulating AuthorityDŵr Cymru Welsh WaterDWI Regulated Supply
Hydro Metric
Outcode SA19 Level
UK National Reference
Regional Status
Mean Mineral Density
64 PPM (4.5 °Clark)
200 PPM (14.0 °Clark)
-68% below baseline
French & German Scale
6.4 °fH / 3.6 °dH
20.0 °fH / 11.2 °dH
European standard conversion
Catchment Uniformity
Variable (95 PPM disparity)
Regional blending standard
5 Sub-catchments
Dishwasher Salt Calibration
H00 (No salt required)
Bosch H03 / Beko Level 2
Salt optional
Regional Hydro-Geological Overview
Water Hardness Breakdown: Outcode SA19
Serving 827 homes and businesses across outcode SA19, mains tap water supplied by Dŵr Cymru Welsh Water registers an average mineral density of 64 PPM (6.4°fH / 3.6°dH). Rated as soft 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 SA19—there is a 95 PPM variance between neighborhoods. Residents in sector SA19 0 enjoy the softest water at 45 PPM, whereas taps in sector SA19 8 register the highest mineral load at 140 PPM. This localized disparity occurs because Dŵr Cymru Welsh Water blends supplies from different boreholes, rivers, and storage reservoirs depending on elevation and seasonal demand.
Tap water supplied to SA19 by Dŵr Cymru Welsh Water originates predominantly from upland surface reservoirs and catchments surrounded by hard, impermeable granite or sandstone geology. Because rainwater runs off dense bedrock without dissolving heavy calcium deposits, it arrives at local taps naturally soft at 64 PPM, keeping plumbing networks clear without requiring water softeners.
Households across SA19's 5 sectors enjoy extended appliance lifespans. Because water contains just 64 PPM of dissolved minerals, kettles remain clean without periodic acid descaling, and sensitive skin or eczema is far less prone to irritation caused by calcium mineral deposits.
Estimated Annual Household Financial Impact
Limescale & Appliance Operating Costs in Outcode SA19
Based on 64 PPM mineral saturation (Soft Water), operating heating appliances across SA19's 827 households carries distinct annual economic consequences:
Extra Combi Boiler Gas Cost£0 (Optimal heat transfer)
Q: What is the average water hardness in outcode SA19?
Tap water across outcode SA19 averages 64 PPM (mg/L), which equals 4.5° Clark, 6.4°fH, or 3.6°dH. It is officially classified as soft water water supplied by Dŵr Cymru Welsh Water.
Q: Is water in SA19 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 64 PPM, water in outcode SA19 is 68% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for SA19?
For Bosch, Siemens, and Neff dishwashers in outcode SA19 (64 PPM), the recommended softener setting is H00 (No salt required).
Q: Who manages the municipal water supply in outcode SA19?
Public tap water infrastructure across all 5 sectors in outcode SA19 is distributed and monitored by Dŵr Cymru Welsh Water.
All Postcode Sectors in SA19
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.