UK Water Quality Report • 2026 Data

Water Hardness in IG11

Water supply analysis across 5 postcode sectors in IG11 (Essex and Suffolk Water).

Outcode Avg Hardness320 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode IG11

Looking for water hardness metrics in IG11? Water supplied by Essex and Suffolk Water in this outcode registers a baseline average of 320 PPM across 5 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in IG11. The lowest mineral concentration is recorded in sector IG11 0 at 320 PPM, whereas sector IG11 9 experiences higher mineral levels reaching 320 PPM.

Due to the very hard water (320 PPM) in IG11, 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 IG11

Lowest mineral concentration

Softest
Sector IG11 0292 Postcodes • Very Hard
320 PPM22.4 °Clark

Hardest Sector in IG11

Highest mineral concentration

Highest Hardness
Sector IG11 9257 Postcodes • Very Hard
320 PPM22.4 °Clark

All Postcode Sectors in IG11

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