Water Hardness in Sector CV23 9

Water Supply Zone Report • Distribution Area Managed by Severn Trent Water

Water Quality Summary: Sector CV23 9

✓ Verified Zone-Level Data (DWI / Defra)
Average Mineral PPM160 PPMModerately Hard
English Clark Scale11.2 °Clark16.0 °fH • 9.0 °dH
Boiler Heat Loss4% – 7%Est. thermal efficiency drag
Bosch Dishwasher SettingH02Softener salt required
Direct Answer & Quick Diagnostic

Tap water in postcode sector CV23 9 has an average water hardness of 160 PPM (mg/L CaCO₃), which equals 11.2° Clark (16.0°fH / 9.0°dH). Classified as moderately hard water distributed by Severn Trent Water, 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 CV23 9

Covering 256 active delivery postcodes in the CV23 district, households and businesses in sector CV23 9 are supplied with tap water averaging 160 PPM (11.2° Clark). Distributed under the regulatory oversight of Severn Trent Water, local tap water supplies in this catchment are rated as moderately hard.

With a balanced reading of 160 PPM (11.2° Clark), water in CV23 9 exhibits a moderate mineral structure. While limescale accumulation is gradual, minor scale rings can form inside kettles and on boiler heat exchangers over 6–12 month periods (estimated thermal efficiency drag of 4% – 7%).

Supplies in this zone are managed through a composite blend of river abstraction points and upland reservoirs operated by Severn Trent Water. The mineral balance fluctuates moderately between seasons, averaging 160 PPM (11.2° Clark) across the 256 postal sectors in this supply matrix.

In everyday household use, calcium and magnesium ions in 160 PPM water bind with soaps, producing chalky bathroom residue and scum on your morning cuppa. In sector CV23 9, washing laundry or dishware requires medium detergent volume with routine machine descaling. For personal grooming, individuals with dry skin or eczema sensitivity may experience skin tightness after showers in this moderately hard water environment.

Calibrating appliance water softening systems in CV23 9 prevents etched glassware and heating element burnouts. Based on Severn Trent Water's official 160 PPM rating, Bosch dishwashers should be set to H02. Consult the interactive equipment guide below for custom brand settings across all 256 postcodes.

Standardized Water Chemistry Metrics

Water Hardness Measurement Conversions for Sector CV23 9

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

Measurement ScaleSymbol / StandardValue in CV23 9
Parts Per Million (UK/US standard)PPM / mg/L CaCO₃160 PPM
English Clark Degrees°Clark / °e11.2 °Clark
French Degrees°fH16.0 °fH
German Degrees (General Hardness)°dH / dGH9.0 °dH
Millimoles Per Litremmol/L1.60 mmol/L
Grains Per Gallon (US)gpg9.3 gpg
Water Hardness Level

160 PPM (mg/L)

11.2 °ClarkModerately Hard
0 PPM (Soft)100 PPM200 PPM (Hard)300+ PPM (Very Hard)
Water supplied by Severn Trent Water in CV23 9 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 CV23 9

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 CV23 9

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 CV23 9

Q: What is the official water hardness level in sector CV23 9?

Tap water in sector CV23 9 has an average mineral density of 160 PPM (mg/L), which equals 11.2° Clark, 16.0°fH, or 9.0°dH. It is officially categorized as moderately hard water supplied by Severn Trent Water.

Q: What dishwasher water softener setting is needed for CV23 9?

For Bosch, Siemens, and Neff dishwashers in sector CV23 9 (160 PPM), the recommended softener setting is H02. Beko models typically require Level 2.

Q: Will hard water damage central heating boilers in CV23 9?

Yes. At 160 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 CV23 9?

Mains water across postcode sector CV23 9 is distributed and monitored by Severn Trent Water in accordance with Drinking Water Inspectorate (DWI) quality standards.

Other Postcode Sectors in CV23

Explore water hardness and limescale risks in neighbouring areas within CV23

Curious how Sector CV23 9 compares?

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

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