UK Water Quality Report • 2026 Data

Water Hardness in RM13

Water supply analysis across 4 postcode sectors in RM13 (Essex and Suffolk Water).

Outcode Avg Hardness320 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode RM13

For residents and businesses in outcode RM13, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that RM13 averages 320 PPM in mineral content, falling into the Very Hard Water classification.

Water chemistry can fluctuate across supply zones in RM13. The lowest mineral concentration is recorded in sector RM13 0 at 320 PPM, whereas sector RM13 9 experiences higher mineral levels reaching 320 PPM.

Due to the very hard water (320 PPM) in RM13, 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 RM13

Lowest mineral concentration

Softest
Sector RM13 09 Postcodes • Very Hard
320 PPM22.4 °Clark

Hardest Sector in RM13

Highest mineral concentration

Highest Hardness
Sector RM13 9269 Postcodes • Very Hard
320 PPM22.4 °Clark

All Postcode Sectors in RM13

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