UK Water Quality Report • 2026 Data

Water Hardness in OX5

Water supply analysis across 4 postcode sectors in OX5 (Thames Water).

Outcode Avg Hardness275 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode OX5

For residents and businesses in outcode OX5, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that OX5 averages 275 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in OX5. The lowest mineral concentration is recorded in sector OX5 1 at 275 PPM, whereas sector OX5 9 experiences higher mineral levels reaching 275 PPM.

Due to the hard water (275 PPM) in OX5, 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 OX5

Lowest mineral concentration

Softest
Sector OX5 1271 Postcodes • Hard
275 PPM19.3 °Clark

Hardest Sector in OX5

Highest mineral concentration

Highest Hardness
Sector OX5 929 Postcodes • Hard
275 PPM19.3 °Clark

All Postcode Sectors in OX5

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