UK Water Quality Report • 2026 Data

Water Hardness in CT17

Water supply analysis across 2 postcode sectors in CT17 (Affinity Water).

Outcode Avg Hardness290 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode CT17

Analyzing water quality disclosures across all 2 postcode sectors in outcode CT17 reveals an average water hardness of 290 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 CT17. The lowest mineral concentration is recorded in sector CT17 0 at 290 PPM, whereas sector CT17 9 experiences higher mineral levels reaching 290 PPM.

Due to the hard water (290 PPM) in CT17, 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 CT17

Lowest mineral concentration

Softest
Sector CT17 0290 Postcodes • Hard
290 PPM20.3 °Clark

Hardest Sector in CT17

Highest mineral concentration

Highest Hardness
Sector CT17 9244 Postcodes • Hard
290 PPM20.3 °Clark

All Postcode Sectors in CT17

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