Official Supplier Data: Severn Trent Water • DWI & BS 7593 Standards
Water Hardness in CH3
Official water quality verdict for outcode CH3: classified as Moderately Hard Water (114 PPM), supplied and treated by Severn Trent Water across 5 sectors.
Rating: Moderately Hard Water114 PPM • 8.0° ClarkSupplier: Severn Trent Water-43% below UK average
Outcode Mean Hardness114 PPM8.0° Clark • Moderately Hard Water11.4°fH • 6.4°dH
Outcode CH3 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode CH3 is officially classified as moderately hard water, averaging 114 PPM (mg/L CaCO₃) or 8.0° Clark, supplied and treated by Severn Trent Water across all 5 postcode sectors (1,110 postcodes). Readings range from 45 PPM (CH3 8) to 160 PPM (CH3 7), showing a local disparity of 115 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.
Local Installer Quote Network
Protect Your Heating & Appliances in CH3 (114 PPM): Compare Local Specialists
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vs. UK Benchmark-43% Softervs 200 PPM national average
Serving 1,110 homes and businesses across outcode CH3, mains tap water supplied by Severn Trent Water registers an average mineral density of 114 PPM (11.4°fH / 6.4°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 CH3—there is a 115 PPM variance between neighborhoods. Residents in sector CH3 8 enjoy the softest water at 45 PPM, whereas taps in sector CH3 7 register the highest mineral load at 160 PPM. This localized disparity occurs because Severn Trent Water blends supplies from different boreholes, rivers, and storage reservoirs depending on elevation and seasonal demand.
Supplies across CH3 are managed by Severn Trent Water through a balanced mix of lowland river abstraction and regional storage reservoirs. Water hardness fluctuates moderately between wet winter periods and dry summer months, averaging 114 PPM across all 1,110 local postcodes under strict Drinking Water Inspectorate (DWI) compliance.
Households across CH3's 1,110 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 CH3
Based on 114 PPM mineral saturation (Moderately Hard Water), operating heating appliances across CH3's 1,110 households carries distinct annual economic consequences:
Q: What is the average water hardness in outcode CH3?
Tap water across outcode CH3 averages 114 PPM (mg/L), which equals 8.0° Clark, 11.4°fH, or 6.4°dH. It is officially classified as moderately hard water water supplied by Severn Trent Water.
Q: Is water in CH3 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 114 PPM, water in outcode CH3 is 43% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for CH3?
For Bosch, Siemens, and Neff dishwashers in outcode CH3 (114 PPM), the recommended softener setting is H02 – H03.
Q: Who manages the municipal water supply in outcode CH3?
Public tap water infrastructure across all 5 sectors in outcode CH3 is distributed and monitored by Severn Trent Water.
All Postcode Sectors in CH3
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.