UK Water Quality Report • 2026 Data

Water Hardness in PO38

Water supply analysis across 4 postcode sectors in PO38 (Southern Water).

Outcode Avg Hardness280 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode PO38

Looking for water hardness metrics in PO38? Water supplied by Southern Water in this outcode registers a baseline average of 280 PPM across 4 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in PO38. The lowest mineral concentration is recorded in sector PO38 1 at 280 PPM, whereas sector PO38 9 experiences higher mineral levels reaching 280 PPM.

Due to the hard water (280 PPM) in PO38, 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 PO38

Lowest mineral concentration

Softest
Sector PO38 1257 Postcodes • Hard
280 PPM19.6 °Clark

Hardest Sector in PO38

Highest mineral concentration

Highest Hardness
Sector PO38 93 Postcodes • Hard
280 PPM19.6 °Clark

All Postcode Sectors in PO38

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