UK Water Quality Report • 2026 Data

Water Hardness in BR3

Water supply analysis across 6 postcode sectors in BR3 (Thames Water).

Outcode Avg Hardness275 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode BR3

For residents and businesses in outcode BR3, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that BR3 averages 275 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in BR3. The lowest mineral concentration is recorded in sector BR3 1 at 275 PPM, whereas sector BR3 9 experiences higher mineral levels reaching 275 PPM.

Due to the hard water (275 PPM) in BR3, 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 BR3

Lowest mineral concentration

Softest
Sector BR3 1243 Postcodes • Hard
275 PPM19.3 °Clark

Hardest Sector in BR3

Highest mineral concentration

Highest Hardness
Sector BR3 919 Postcodes • Hard
275 PPM19.3 °Clark

All Postcode Sectors in BR3

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