UK Water Quality Report • 2026 Data

Water Hardness in RG26

Water supply analysis across 4 postcode sectors in RG26 (Thames Water).

Outcode Avg Hardness272.5 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode RG26

Looking for water hardness metrics in RG26? Water supplied by Thames Water in this outcode registers a baseline average of 272.5 PPM across 4 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in RG26. The lowest mineral concentration is recorded in sector RG26 5 at 270 PPM, whereas sector RG26 4 experiences higher mineral levels reaching 275 PPM.

Due to the hard water (272.5 PPM) in RG26, 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 RG26

Lowest mineral concentration

Softest
Sector RG26 5319 Postcodes • Hard
270 PPM18.9 °Clark

Hardest Sector in RG26

Highest mineral concentration

Highest Hardness
Sector RG26 4121 Postcodes • Hard
275 PPM19.3 °Clark

All Postcode Sectors in RG26

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