Official water quality verdict for outcode SY18: classified as Moderately Hard Water (135 PPM), supplied and treated by Hafren Dyfrdwy across 2 sectors.
Rating: Moderately Hard Water135 PPM • 9.5° ClarkSupplier: Hafren Dyfrdwy-32% below UK average
Outcode Mean Hardness135 PPM9.5° Clark • Moderately Hard Water13.5°fH • 7.6°dH
Outcode SY18 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode SY18 is officially classified as moderately hard water, averaging 135 PPM (mg/L CaCO₃) or 9.5° Clark, supplied and treated by Hafren Dyfrdwy across all 2 postcode sectors (226 postcodes). Readings range from 130 PPM (SY18 9) to 140 PPM (SY18 6), showing a local disparity of 10 PPM.
☕ Kettle & Tea Quality:
Gradual chalky ring forms in kettles over 2–3 months. Descale quarterly with citric acid crystals to keep heating elements clean.
🚿 Skin & Bathing:
Moderate mineral content is generally gentle on skin, producing normal lather with everyday soaps and shampoos.
🍽️ Appliances & Salt:
Set dishwashers to H02 – H03 to avoid cloudy glassware, and check boiler inhibitor levels at your annual service.
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Protect Your Heating & Appliances in SY18 (135 PPM): Compare Local Specialists
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vs. UK Benchmark-32% Softervs 200 PPM national average
Serving 226 homes and businesses across outcode SY18, mains tap water supplied by Hafren Dyfrdwy registers an average mineral density of 135 PPM (13.5°fH / 7.6°dH). Rated as moderately 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 SY18—there is a 10 PPM variance between neighborhoods. Residents in sector SY18 9 enjoy the softest water at 130 PPM, whereas taps in sector SY18 6 register the highest mineral load at 140 PPM. This localized disparity occurs because Hafren Dyfrdwy 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 SY18 maintains an average mineral density of 135 PPM, ensuring consistent municipal distribution and wholesome tap drinking water from Hafren Dyfrdwy.
Households across SY18's 226 postcodes experience manageable mineral levels. While heating efficiency losses remain mild (4% – 7%), routine descaling of steam irons and thermostatic shower cartridges prevents gradual mineral clogging.
Estimated Annual Household Financial Impact
Limescale & Appliance Operating Costs in Outcode SY18
Based on 135 PPM mineral saturation (Moderately Hard Water), operating heating appliances across SY18's 226 households carries distinct annual economic consequences:
Q: What is the average water hardness in outcode SY18?
Tap water across outcode SY18 averages 135 PPM (mg/L), which equals 9.5° Clark, 13.5°fH, or 7.6°dH. It is officially classified as moderately hard water water supplied by Hafren Dyfrdwy.
Q: Is water in SY18 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 135 PPM, water in outcode SY18 is 32% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for SY18?
For Bosch, Siemens, and Neff dishwashers in outcode SY18 (135 PPM), the recommended softener setting is H02 – H03.
Q: Who manages the municipal water supply in outcode SY18?
Public tap water infrastructure across all 2 sectors in outcode SY18 is distributed and monitored by Hafren Dyfrdwy.
All Postcode Sectors in SY18
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.