UK Water Quality Report • 2026 Data

Water Hardness in CT5

Water supply analysis across 5 postcode sectors in CT5 (South East Water).

Outcode Avg Hardness270 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode CT5

Analyzing water quality disclosures across all 5 postcode sectors in outcode CT5 reveals an average water hardness of 270 PPM (Hard Water). Public water supply across this area is managed by South East Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in CT5. The lowest mineral concentration is recorded in sector CT5 1 at 270 PPM, whereas sector CT5 9 experiences higher mineral levels reaching 270 PPM.

Due to the hard water (270 PPM) in CT5, 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 H04) 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 CT5

Lowest mineral concentration

Softest
Sector CT5 1255 Postcodes • Hard
270 PPM18.9 °Clark

Hardest Sector in CT5

Highest mineral concentration

Highest Hardness
Sector CT5 98 Postcodes • Hard
270 PPM18.9 °Clark

All Postcode Sectors in CT5

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