UK Water Quality Report • 2026 Data

Water Hardness in WD3

Water supply analysis across 10 postcode sectors in WD3 (Affinity Water).

Outcode Avg Hardness274 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode WD3

Looking for water hardness metrics in WD3? Water supplied by Affinity Water in this outcode registers a baseline average of 274 PPM across 10 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in WD3. The lowest mineral concentration is recorded in sector WD3 2 at 130 PPM, whereas sector WD3 9 experiences higher mineral levels reaching 290 PPM.

Due to the hard water (274 PPM) in WD3, 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 WD3

Lowest mineral concentration

Softest
Sector WD3 21 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in WD3

Highest mineral concentration

Highest Hardness
Sector WD3 974 Postcodes • Hard
290 PPM20.3 °Clark

All Postcode Sectors in WD3

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