UK Water Quality Report • 2026 Data

Water Hardness in NN14

Water supply analysis across 5 postcode sectors in NN14 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode NN14

Looking for water hardness metrics in NN14? Water supplied by Anglian Water in this outcode registers a baseline average of 310 PPM across 5 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in NN14. The lowest mineral concentration is recorded in sector NN14 1 at 310 PPM, whereas sector NN14 6 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in NN14, 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 NN14

Lowest mineral concentration

Softest
Sector NN14 1304 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in NN14

Highest mineral concentration

Highest Hardness
Sector NN14 6203 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in NN14

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