UK Water Quality Report • 2026 Data

Water Hardness in RH9

Water supply analysis across 1 postcode sectors in RH9 (SES Water).

Outcode Avg Hardness260 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode RH9

For residents and businesses in outcode RH9, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that RH9 averages 260 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in RH9. The lowest mineral concentration is recorded in sector RH9 8 at 260 PPM, whereas sector RH9 8 experiences higher mineral levels reaching 260 PPM.

Due to the hard water (260 PPM) in RH9, 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 RH9

Lowest mineral concentration

Softest
Sector RH9 8151 Postcodes • Hard
260 PPM18.2 °Clark

Hardest Sector in RH9

Highest mineral concentration

Highest Hardness
Sector RH9 8151 Postcodes • Hard
260 PPM18.2 °Clark

All Postcode Sectors in RH9

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