UK Water Quality Report • 2026 Data

Water Hardness in LN9

Water supply analysis across 3 postcode sectors in LN9 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode LN9

For residents and businesses in outcode LN9, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that LN9 averages 310 PPM in mineral content, falling into the Very Hard Water classification.

Water chemistry can fluctuate across supply zones in LN9. The lowest mineral concentration is recorded in sector LN9 5 at 310 PPM, whereas sector LN9 9 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in LN9, 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 LN9

Lowest mineral concentration

Softest
Sector LN9 5206 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in LN9

Highest mineral concentration

Highest Hardness
Sector LN9 94 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in LN9

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