UK Water Quality Report • 2026 Data

Water Hardness in OX17

Water supply analysis across 3 postcode sectors in OX17 (Thames Water).

Outcode Avg Hardness286.7 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode OX17

For residents and businesses in outcode OX17, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that OX17 averages 286.7 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in OX17. The lowest mineral concentration is recorded in sector OX17 1 at 275 PPM, whereas sector OX17 2 experiences higher mineral levels reaching 310 PPM.

Due to the hard water (286.7 PPM) in OX17, 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 H07 (Max Salt)) 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 OX17

Lowest mineral concentration

Softest
Sector OX17 1242 Postcodes • Hard
275 PPM19.3 °Clark

Hardest Sector in OX17

Highest mineral concentration

Highest Hardness
Sector OX17 2240 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in OX17

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