UK Water Quality Report • 2026 Data

Water Hardness in IP9

Water supply analysis across 2 postcode sectors in IP9 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode IP9

Analyzing water quality disclosures across all 2 postcode sectors in outcode IP9 reveals an average water hardness of 310 PPM (Very Hard Water). Public water supply across this area is managed by Anglian Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in IP9. The lowest mineral concentration is recorded in sector IP9 1 at 310 PPM, whereas sector IP9 2 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in IP9, 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 IP9

Lowest mineral concentration

Softest
Sector IP9 1191 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in IP9

Highest mineral concentration

Highest Hardness
Sector IP9 2306 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in IP9

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