Official water quality verdict for outcode HR9: classified as Moderately Hard Water (150 PPM), supplied and treated by Severn Trent / Hafren Dyfrdwy across 4 sectors.
Rating: Moderately Hard Water150 PPM • 10.5° ClarkSupplier: Severn Trent / Hafren Dyfrdwy-25% below UK average
Outcode Mean Hardness150 PPM10.5° Clark • Moderately Hard Water15.0°fH • 8.4°dH
Outcode HR9 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode HR9 is officially classified as moderately hard water, averaging 150 PPM (mg/L CaCO₃) or 10.5° Clark, supplied and treated by Severn Trent / Hafren Dyfrdwy across all 4 postcode sectors (832 postcodes). Readings range from 150 PPM (HR9 5) to 150 PPM (HR9 9) with consistent mineral levels throughout.
☕ 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 HR9 (150 PPM): Compare Local Specialists
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vs. UK Benchmark-25% Softervs 200 PPM national average
Serving 832 homes and businesses across outcode HR9, mains tap water supplied by Severn Trent / Hafren Dyfrdwy registers an average mineral density of 150 PPM (15.0°fH / 8.4°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 is remarkably consistent across all 4 sectors of HR9, with readings holding steady at 150 PPM from HR9 5 through to HR9 9. This uniform profile means every household on the Severn Trent / Hafren Dyfrdwy network in this zone shares the same appliance settings and kettle descaling routine.
Supplies across HR9 are managed by Severn Trent / Hafren Dyfrdwy 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 150 PPM across all 832 local postcodes under strict Drinking Water Inspectorate (DWI) compliance.
With moderate water hardness (150 PPM) in HR9, kettles and showerheads build a light white chalk ring every 2–3 months. A quick rinse with warm water and white vinegar or food-grade citric acid crystals clears the element in minutes. To prevent cloudy glassware, maintain your dishwasher salt top-up set to H02 – H03. Combi boilers also benefit from regular inhibitor checks during annual boiler servicing in line with British Standard BS 7593.
Estimated Annual Household Financial Impact
Limescale & Appliance Operating Costs in Outcode HR9
Based on 150 PPM mineral saturation (Moderately Hard Water), operating heating appliances across HR9's 832 households carries distinct annual economic consequences:
Tap water throughout outcode HR9 is supplied from a unified distribution network managed by Severn Trent / Hafren Dyfrdwy. With all 4 sectors presenting an identical mineral concentration of 150 PPM, households across all 832 postcodes share uniform limescale risk profiles and identical appliance salt calibrations (H02 – H03).
Frequently Asked Questions: Water in Outcode HR9
Q: What is the average water hardness in outcode HR9?
Tap water across outcode HR9 averages 150 PPM (mg/L), which equals 10.5° Clark, 15.0°fH, or 8.4°dH. It is officially classified as moderately hard water water supplied by Severn Trent / Hafren Dyfrdwy.
Q: Is water in HR9 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 150 PPM, water in outcode HR9 is 25% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for HR9?
For Bosch, Siemens, and Neff dishwashers in outcode HR9 (150 PPM), the recommended softener setting is H02 – H03.
Q: Who manages the municipal water supply in outcode HR9?
Public tap water infrastructure across all 4 sectors in outcode HR9 is distributed and monitored by Severn Trent / Hafren Dyfrdwy.
All Postcode Sectors in HR9
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.