UK Water Quality Report • 2026 Data

Water Hardness in CO7

Water supply analysis across 6 postcode sectors in CO7 (Affinity Water).

Outcode Avg Hardness293.3 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode CO7

Analyzing water quality disclosures across all 6 postcode sectors in outcode CO7 reveals an average water hardness of 293.3 PPM (Hard Water). Public water supply across this area is managed by Affinity Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in CO7. The lowest mineral concentration is recorded in sector CO7 0 at 290 PPM, whereas sector CO7 6 experiences higher mineral levels reaching 310 PPM.

Due to the hard water (293.3 PPM) in CO7, 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 CO7

Lowest mineral concentration

Softest
Sector CO7 0237 Postcodes • Hard
290 PPM20.3 °Clark

Hardest Sector in CO7

Highest mineral concentration

Highest Hardness
Sector CO7 6281 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in CO7

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