UK Water Quality Report • 2026 Data

Water Hardness in N3

Water supply analysis across 4 postcode sectors in N3 (Affinity Water).

Outcode Avg Hardness290 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode N3

Analyzing water quality disclosures across all 4 postcode sectors in outcode N3 reveals an average water hardness of 290 PPM (Hard Water). Public water supply across this area is managed by Affinity Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in N3. The lowest mineral concentration is recorded in sector N3 1 at 290 PPM, whereas sector N3 9 experiences higher mineral levels reaching 290 PPM.

Due to the hard water (290 PPM) in N3, 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 N3

Lowest mineral concentration

Softest
Sector N3 1229 Postcodes • Hard
290 PPM20.3 °Clark

Hardest Sector in N3

Highest mineral concentration

Highest Hardness
Sector N3 918 Postcodes • Hard
290 PPM20.3 °Clark

All Postcode Sectors in N3

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