Official Supplier Data: Severn Trent Water • DWI & BS 7593 Standards
Water Hardness in ST5
Official water quality verdict for outcode ST5: classified as Moderately Hard Water (160 PPM), supplied and treated by Severn Trent Water across 10 sectors.
Rating: Moderately Hard Water160 PPM • 11.2° ClarkSupplier: Severn Trent Water-20% below UK average
Outcode Mean Hardness160 PPM11.2° Clark • Moderately Hard Water16.0°fH • 9.0°dH
Outcode ST5 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode ST5 is officially classified as moderately hard water, averaging 160 PPM (mg/L CaCO₃) or 11.2° Clark, supplied and treated by Severn Trent Water across all 10 postcode sectors (2,036 postcodes). Readings range from 160 PPM (ST5 0) to 160 PPM (ST5 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.
Local Installer Quote Network
Protect Your Heating & Appliances in ST5 (160 PPM): Compare Local Specialists
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vs. UK Benchmark-20% Softervs 200 PPM national average
Tired of stubborn limescale buildup in your kettle or dealing with an unappetising film of scum on your morning cuppa? Tap water across all 10 postcode sectors in outcode ST5 (covering 2,036 homes) averages 160 PPM (11.2° Clark). Maintained and distributed by Severn Trent Water, this places the district firmly into the moderately hard water bracket—approximately 20% softer than the UK national baseline (200 PPM).
Water hardness is remarkably consistent across all 10 sectors of ST5, with readings holding steady at 160 PPM from ST5 0 through to ST5 9. This uniform profile means every household on the Severn Trent Water network in this zone shares the same appliance settings and kettle descaling routine.
Supplies across ST5 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 160 PPM across all 2,036 local postcodes under strict Drinking Water Inspectorate (DWI) compliance.
Households across ST5's 2,036 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 ST5
Based on 160 PPM mineral saturation (Moderately Hard Water), operating heating appliances across ST5's 2,036 households carries distinct annual economic consequences:
Tap water throughout outcode ST5 is supplied from a unified distribution network managed by Severn Trent Water. With all 10 sectors presenting an identical mineral concentration of 160 PPM, households across all 2,036 postcodes share uniform limescale risk profiles and identical appliance salt calibrations (H02 – H03).
Frequently Asked Questions: Water in Outcode ST5
Q: What is the average water hardness in outcode ST5?
Tap water across outcode ST5 averages 160 PPM (mg/L), which equals 11.2° Clark, 16.0°fH, or 9.0°dH. It is officially classified as moderately hard water water supplied by Severn Trent Water.
Q: Is water in ST5 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 160 PPM, water in outcode ST5 is 20% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for ST5?
For Bosch, Siemens, and Neff dishwashers in outcode ST5 (160 PPM), the recommended softener setting is H02 – H03.
Q: Who manages the municipal water supply in outcode ST5?
Public tap water infrastructure across all 10 sectors in outcode ST5 is distributed and monitored by Severn Trent Water.
All Postcode Sectors in ST5
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.