Water Hardness in Sector WR13 5

Water Supply Zone Report • Distribution Area Managed by Severn Trent / Hafren Dyfrdwy

Water Quality Summary: Sector WR13 5

ⓘ Regional Catchment Estimate (Severn Trent / Hafren Dyfrdwy)
Average Mineral PPM150 PPMModerately Hard
English Clark Scale10.5 °Clark15.0 °fH • 8.4 °dH
Boiler Heat Loss4% – 7%Est. thermal efficiency drag
Bosch Dishwasher SettingH02Softener salt required
Direct Answer & Quick Diagnostic

Tap water in postcode sector WR13 5 has an average water hardness of 150 PPM (mg/L CaCO₃), which equals 10.5° Clark (15.0°fH / 8.4°dH). Classified as moderately hard water distributed by Severn Trent / Hafren Dyfrdwy, domestic dishwashers require setting H02 and combi boilers face an estimated thermal efficiency drag of 4% – 7% without scale protection.

Comprehensive Hydro-Geological Analysis

Water Hardness Breakdown for Sector WR13 5

Public water quality records published by Severn Trent / Hafren Dyfrdwy indicate that tap water across postcode sector WR13 5 registers an average mineral hardness of 150 PPM (mg/L of calcium carbonate). Serving approximately 159 postal units in the WR13 area, this sector falls within the official moderately hard water classification.

Tap water in sector WR13 5 averages 150 PPM, presenting a manageable mineral level for the 159 local postcodes. Heating equipment operates with negligible efficiency loss (4% – 7%), though routine quarterly inspection of kettle elements remains beneficial.

Supplies in this zone are managed through a composite blend of river abstraction points and upland reservoirs operated by Severn Trent / Hafren Dyfrdwy. The mineral balance fluctuates moderately between seasons, averaging 150 PPM (10.5° Clark) across the 159 postal sectors in this supply matrix.

Household water chemistry in WR13 5 (10.5° Clark) dictates everyday cleaning efficiency. Water supplied by Severn Trent / Hafren Dyfrdwy at this level necessitates medium detergent volume with routine machine descaling, while inline shower head filters can help sensitive skin by mitigating mineral residue during washing.

To preserve internal ion-exchange resin chambers, domestic dishwashers operating in sector WR13 5 should be calibrated precisely for 150 PPM. For Bosch, Neff, and Siemens appliances, the recommended salt dosing index is H02. Explore our interactive configuration tool below to verify exact settings for Beko, Miele, and Whirlpool units.

Standardized Water Chemistry Metrics

Water Hardness Measurement Conversions for Sector WR13 5

Standardised unit equivalents used across British plumbing standards (BS 7593), European appliance manuals, and water testing:

Measurement ScaleSymbol / StandardValue in WR13 5
Parts Per Million (UK/US standard)PPM / mg/L CaCO₃150 PPM
English Clark Degrees°Clark / °e10.5 °Clark
French Degrees°fH15.0 °fH
German Degrees (General Hardness)°dH / dGH8.4 °dH
Millimoles Per Litremmol/L1.50 mmol/L
Grains Per Gallon (US)gpg8.8 gpg
Water Hardness Level

150 PPM (mg/L)

10.5 °ClarkModerately Hard
0 PPM (Soft)100 PPM200 PPM (Hard)300+ PPM (Very Hard)
Water supplied by Severn Trent / Hafren Dyfrdwy in WR13 5 is categorized as Moderately Hard. High mineral content causes rapid limescale build-up on heating elements and appliances.
Dishwasher Setup Guide

Exact Water Softener Setting for WR13 5

Select your dishwasher brand to get the manufacturer-recommended salt setting for this area.

Recommended Setting:H02
⚠️ Dishwasher salt is required to prevent cloudy glasses and internal scale buildup.
Boiler Efficiency Loss~5%Extra energy cost per year
Limescale Formation RiskModerateOn taps, kettles & showers
Detergent Needed+50% DoseFor laundry & dishwashing
Recommended Solutions

Protect Your Appliances in WR13 5

Essential

Dishwasher Regeneration Salt

Prevents limescale buildup in water softeners and stops cloudy film on glassware.

Check Price on Amazon
Skin & Hair Protection

Shower Head Water Filter

Reduces chlorine & hard minerals to protect against dry skin, eczema, and hair damage.

Check Shower Filters
Maintenance

Appliance Descaler Tablets

Quickly dissolves limescale deposits inside kettles, coffee machines, and washing machines.

View Descalers
Frequently Asked Questions

Water Hardness FAQs for Sector WR13 5

Q: What is the official water hardness level in sector WR13 5?

Tap water in sector WR13 5 has an average mineral density of 150 PPM (mg/L), which equals 10.5° Clark, 15.0°fH, or 8.4°dH. It is officially categorized as moderately hard water supplied by Severn Trent / Hafren Dyfrdwy.

Q: What dishwasher water softener setting is needed for WR13 5?

For Bosch, Siemens, and Neff dishwashers in sector WR13 5 (150 PPM), the recommended softener setting is H02. Beko models typically require Level 2.

Q: Will hard water damage central heating boilers in WR13 5?

Yes. At 150 PPM, calcium carbonate precipitation will build scale layers on heating elements over time, potentially reducing boiler heat transfer efficiency by 4% – 7% without proper filtration or descaling.

Q: Who is the regulated water supplier for sector WR13 5?

Mains water across postcode sector WR13 5 is distributed and monitored by Severn Trent / Hafren Dyfrdwy in accordance with Drinking Water Inspectorate (DWI) quality standards.

Other Postcode Sectors in WR13

Explore water hardness and limescale risks in neighbouring areas within WR13

Curious how Sector WR13 5 compares?

Compare your local mineral PPM, boiler efficiency risks, and appliance settings directly against Central London (SW1A 1).

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