UK Water Quality Report • 2026 Data

Water Hardness in NW1W

Water supply analysis across 4 postcode sectors in NW1W (Northumbrian Water).

Outcode Avg Hardness238.8 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode NW1W

For residents and businesses in outcode NW1W, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that NW1W averages 238.8 PPM in mineral content, falling into the Hard Water classification.

Water chemistry can fluctuate across supply zones in NW1W. The lowest mineral concentration is recorded in sector NW1W 6 at 130 PPM, whereas sector NW1W 9 experiences higher mineral levels reaching 275 PPM.

Due to the hard water (238.8 PPM) in NW1W, 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 NW1W

Lowest mineral concentration

Softest
Sector NW1W 6130 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in NW1W

Highest mineral concentration

Highest Hardness
Sector NW1W 9295 Postcodes • Hard
275 PPM19.3 °Clark

All Postcode Sectors in NW1W

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