UK Water Quality Report • 2026 Data

Water Hardness in EC1Y

Water supply analysis across 5 postcode sectors in EC1Y (Thames Water).

Outcode Avg Hardness275 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode EC1Y

For residents and businesses in outcode EC1Y, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that EC1Y averages 275 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in EC1Y. The lowest mineral concentration is recorded in sector EC1Y 0 at 275 PPM, whereas sector EC1Y 8 experiences higher mineral levels reaching 275 PPM.

Due to the hard water (275 PPM) in EC1Y, 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 EC1Y

Lowest mineral concentration

Softest
Sector EC1Y 056 Postcodes • Hard
275 PPM19.3 °Clark

Hardest Sector in EC1Y

Highest mineral concentration

Highest Hardness
Sector EC1Y 887 Postcodes • Hard
275 PPM19.3 °Clark

All Postcode Sectors in EC1Y

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