UK Water Quality Report • 2026 Data

Water Hardness in DN10

Water supply analysis across 3 postcode sectors in DN10 (Anglian Water).

Outcode Avg Hardness243.3 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode DN10

Analyzing water quality disclosures across all 3 postcode sectors in outcode DN10 reveals an average water hardness of 243.3 PPM (Hard Water). Public water supply across this area is managed by Anglian Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in DN10. The lowest mineral concentration is recorded in sector DN10 6 at 110 PPM, whereas sector DN10 5 experiences higher mineral levels reaching 310 PPM.

Due to the hard water (243.3 PPM) in DN10, 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 DN10

Lowest mineral concentration

Softest
Sector DN10 6220 Postcodes • Moderately Soft
110 PPM7.7 °Clark

Hardest Sector in DN10

Highest mineral concentration

Highest Hardness
Sector DN10 5104 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in DN10

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