UK Water Quality Report • 2026 Data

Water Hardness in CB5

Water supply analysis across 1 postcode sectors in CB5 (Cambridge Water).

Outcode Avg Hardness315 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode CB5

Analyzing water quality disclosures across all 1 postcode sectors in outcode CB5 reveals an average water hardness of 315 PPM (Very Hard Water). Public water supply across this area is managed by Cambridge Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in CB5. The lowest mineral concentration is recorded in sector CB5 8 at 315 PPM, whereas sector CB5 8 experiences higher mineral levels reaching 315 PPM.

Due to the very hard water (315 PPM) in CB5, 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 CB5

Lowest mineral concentration

Softest
Sector CB5 8279 Postcodes • Very Hard
315 PPM22 °Clark

Hardest Sector in CB5

Highest mineral concentration

Highest Hardness
Sector CB5 8279 Postcodes • Very Hard
315 PPM22 °Clark

All Postcode Sectors in CB5

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