Official Supplier Data: South West Water • DWI & BS 7593 Standards
Water Hardness in BH13
Official water quality verdict for outcode BH13: classified as Moderately Hard Water (165 PPM), supplied and treated by South West Water across 2 sectors.
Rating: Moderately Hard Water165 PPM • 11.6° ClarkSupplier: South West Water-17% below UK average
Outcode Mean Hardness165 PPM11.6° Clark • Moderately Hard Water16.5°fH • 9.2°dH
Outcode BH13 Household Water Quality Verdict & Practical Advice
Domestic tap water in outcode BH13 is officially classified as moderately hard water, averaging 165 PPM (mg/L CaCO₃) or 11.6° Clark, supplied and treated by South West Water across all 2 postcode sectors (297 postcodes). Readings range from 40 PPM (BH13 6) to 290 PPM (BH13 7), showing a local disparity of 250 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 BH13 (165 PPM): Compare Local Specialists
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vs. UK Benchmark-17% Softervs 200 PPM national average
Statistical distribution across all 2 postcode sectors and 297 delivery points under South West Water's catchment monitoring:
Analyzed Sectors2297 postcodes
PPM Spread (Min - Max)40 – 290Variance: 250 PPM
Predominant ZoneModerately Hard Water50% hard/very hard
Regulating AuthoritySouth West WaterDWI Regulated Supply
Hydro Metric
Outcode BH13 Level
UK National Reference
Regional Status
Mean Mineral Density
165 PPM (11.6 °Clark)
200 PPM (14.0 °Clark)
-17% below baseline
French & German Scale
16.5 °fH / 9.2 °dH
20.0 °fH / 11.2 °dH
European standard conversion
Catchment Uniformity
Variable (250 PPM disparity)
Regional blending standard
2 Sub-catchments
Dishwasher Salt Calibration
H02 – H03
Bosch H03 / Beko Level 2
Salt required
Regional Hydro-Geological Overview
Water Hardness Breakdown: Outcode BH13
Serving 297 homes and businesses across outcode BH13, mains tap water supplied by South West Water registers an average mineral density of 165 PPM (16.5°fH / 9.2°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 BH13—there is a 250 PPM variance between neighborhoods. Residents in sector BH13 6 enjoy the softest water at 40 PPM, whereas taps in sector BH13 7 register the highest mineral load at 290 PPM. This localized disparity occurs because South West Water blends supplies from different boreholes, rivers, and storage reservoirs depending on elevation and seasonal demand.
Supplies across BH13 are managed by South West 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 165 PPM across all 297 local postcodes under strict Drinking Water Inspectorate (DWI) compliance.
With moderate water hardness (165 PPM) in BH13, 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 BH13
Based on 165 PPM mineral saturation (Moderately Hard Water), operating heating appliances across BH13's 297 households carries distinct annual economic consequences:
Q: What is the average water hardness in outcode BH13?
Tap water across outcode BH13 averages 165 PPM (mg/L), which equals 11.6° Clark, 16.5°fH, or 9.2°dH. It is officially classified as moderately hard water water supplied by South West Water.
Q: Is water in BH13 harder than the UK national average?
The UK baseline average is approximately 200 PPM. At 165 PPM, water in outcode BH13 is 17% softer than the national benchmark.
Q: What dishwasher salt setting is recommended for BH13?
For Bosch, Siemens, and Neff dishwashers in outcode BH13 (165 PPM), the recommended softener setting is H02 – H03.
Q: Who manages the municipal water supply in outcode BH13?
Public tap water infrastructure across all 2 sectors in outcode BH13 is distributed and monitored by South West Water.
All Postcode Sectors in BH13
Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.