UK Water Quality Report • 2026 Data

Water Hardness in RH17

Water supply analysis across 3 postcode sectors in RH17 (South East Water).

Outcode Avg Hardness270 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode RH17

Analyzing water quality disclosures across all 3 postcode sectors in outcode RH17 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 RH17. The lowest mineral concentration is recorded in sector RH17 5 at 270 PPM, whereas sector RH17 7 experiences higher mineral levels reaching 270 PPM.

Due to the hard water (270 PPM) in RH17, 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 RH17

Lowest mineral concentration

Softest
Sector RH17 5254 Postcodes • Hard
270 PPM18.9 °Clark

Hardest Sector in RH17

Highest mineral concentration

Highest Hardness
Sector RH17 7229 Postcodes • Hard
270 PPM18.9 °Clark

All Postcode Sectors in RH17

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