UK Water Quality Report • 2026 Data

Water Hardness in CH5

Water supply analysis across 5 postcode sectors in CH5 (Severn Trent / Hafren Dyfrdwy).

Outcode Avg Hardness148 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode CH5

Analyzing water quality disclosures across all 5 postcode sectors in outcode CH5 reveals an average water hardness of 148 PPM (Moderately Hard Water). Public water supply across this area is managed by Severn Trent / Hafren Dyfrdwy, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in CH5. The lowest mineral concentration is recorded in sector CH5 2 at 140 PPM, whereas sector CH5 9 experiences higher mineral levels reaching 150 PPM.

Due to the moderately hard water (148 PPM) in CH5, limescale build-up can occur on heating elements, shower heads, and boilers. Setting your dishwasher water softener to the correct level (e.g. Bosch setting H02) is strongly recommended to prevent cloudy glassware and internal scale accumulation. Review the individual postcode sectors below to get precise dishwasher salt settings and limescale recommendations.

Softest Sector in CH5

Lowest mineral concentration

Softest
Sector CH5 2265 Postcodes • Moderately Hard
140 PPM9.8 °Clark

Hardest Sector in CH5

Highest mineral concentration

Highest Hardness
Sector CH5 916 Postcodes • Moderately Hard
150 PPM10.5 °Clark

All Postcode Sectors in CH5

Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.