UK Water Quality Report • 2026 Data

Water Hardness in IP23

Water supply analysis across 3 postcode sectors in IP23 (Essex and Suffolk Water).

Outcode Avg Hardness316.7 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode IP23

Looking for water hardness metrics in IP23? Water supplied by Essex and Suffolk Water in this outcode registers a baseline average of 316.7 PPM across 3 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in IP23. The lowest mineral concentration is recorded in sector IP23 9 at 310 PPM, whereas sector IP23 8 experiences higher mineral levels reaching 320 PPM.

Due to the very hard water (316.7 PPM) in IP23, 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 IP23

Lowest mineral concentration

Softest
Sector IP23 94 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in IP23

Highest mineral concentration

Highest Hardness
Sector IP23 8137 Postcodes • Very Hard
320 PPM22.4 °Clark

All Postcode Sectors in IP23

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