UK Water Quality Report • 2026 Data

Water Hardness in NN8

Water supply analysis across 7 postcode sectors in NN8 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode NN8

Looking for water hardness metrics in NN8? Water supplied by Anglian Water in this outcode registers a baseline average of 310 PPM across 7 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in NN8. The lowest mineral concentration is recorded in sector NN8 1 at 310 PPM, whereas sector NN8 9 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in NN8, 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 NN8

Lowest mineral concentration

Softest
Sector NN8 1272 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in NN8

Highest mineral concentration

Highest Hardness
Sector NN8 955 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in NN8

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