UK Water Quality Report • 2026 Data

Water Hardness in NN16

Water supply analysis across 4 postcode sectors in NN16 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode NN16

For residents and businesses in outcode NN16, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that NN16 averages 310 PPM in mineral content, falling into the Very Hard Water classification.

Water chemistry can fluctuate across supply zones in NN16. The lowest mineral concentration is recorded in sector NN16 0 at 310 PPM, whereas sector NN16 9 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in NN16, 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 NN16

Lowest mineral concentration

Softest
Sector NN16 0206 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in NN16

Highest mineral concentration

Highest Hardness
Sector NN16 9311 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in NN16

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