UK Water Quality Report • 2026 Data

Water Hardness in RM5

Water supply analysis across 2 postcode sectors in RM5 (Essex and Suffolk Water).

Outcode Avg Hardness320 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode RM5

Looking for water hardness metrics in RM5? Water supplied by Essex and Suffolk Water in this outcode registers a baseline average of 320 PPM across 2 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in RM5. The lowest mineral concentration is recorded in sector RM5 2 at 320 PPM, whereas sector RM5 3 experiences higher mineral levels reaching 320 PPM.

Due to the very hard water (320 PPM) in RM5, 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 RM5

Lowest mineral concentration

Softest
Sector RM5 2176 Postcodes • Very Hard
320 PPM22.4 °Clark

Hardest Sector in RM5

Highest mineral concentration

Highest Hardness
Sector RM5 3203 Postcodes • Very Hard
320 PPM22.4 °Clark

All Postcode Sectors in RM5

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