UK Water Quality Report • 2026 Data

Water Hardness in RM7

Water supply analysis across 5 postcode sectors in RM7 (Essex and Suffolk Water).

Outcode Avg Hardness320 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode RM7

For residents and businesses in outcode RM7, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that RM7 averages 320 PPM in mineral content, falling into the Very Hard Water classification.

Water chemistry can fluctuate across supply zones in RM7. The lowest mineral concentration is recorded in sector RM7 0 at 320 PPM, whereas sector RM7 9 experiences higher mineral levels reaching 320 PPM.

Due to the very hard water (320 PPM) in RM7, 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 RM7

Lowest mineral concentration

Softest
Sector RM7 0200 Postcodes • Very Hard
320 PPM22.4 °Clark

Hardest Sector in RM7

Highest mineral concentration

Highest Hardness
Sector RM7 9108 Postcodes • Very Hard
320 PPM22.4 °Clark

All Postcode Sectors in RM7

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