UK Water Quality Report • 2026 Data

Water Hardness in SO50

Water supply analysis across 8 postcode sectors in SO50 (Southern Water).

Outcode Avg Hardness261.3 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode SO50

Looking for water hardness metrics in SO50? Water supplied by Southern Water in this outcode registers a baseline average of 261.3 PPM across 8 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in SO50. The lowest mineral concentration is recorded in sector SO50 3 at 130 PPM, whereas sector SO50 9 experiences higher mineral levels reaching 280 PPM.

Due to the hard water (261.3 PPM) in SO50, 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 SO50

Lowest mineral concentration

Softest
Sector SO50 31 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in SO50

Highest mineral concentration

Highest Hardness
Sector SO50 9242 Postcodes • Hard
280 PPM19.6 °Clark

All Postcode Sectors in SO50

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