UK Water Quality Report • 2026 Data

Water Hardness in HP5

Water supply analysis across 4 postcode sectors in HP5 (Affinity Water).

Outcode Avg Hardness290 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode HP5

For residents and businesses in outcode HP5, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that HP5 averages 290 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in HP5. The lowest mineral concentration is recorded in sector HP5 1 at 290 PPM, whereas sector HP5 9 experiences higher mineral levels reaching 290 PPM.

Due to the hard water (290 PPM) in HP5, 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 H04) 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 HP5

Lowest mineral concentration

Softest
Sector HP5 1246 Postcodes • Hard
290 PPM20.3 °Clark

Hardest Sector in HP5

Highest mineral concentration

Highest Hardness
Sector HP5 94 Postcodes • Hard
290 PPM20.3 °Clark

All Postcode Sectors in HP5

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