UK Water Quality Report • 2026 Data

Water Hardness in PO6

Water supply analysis across 5 postcode sectors in PO6 (Portsmouth Water).

Outcode Avg Hardness250 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode PO6

Analyzing water quality disclosures across all 5 postcode sectors in outcode PO6 reveals an average water hardness of 250 PPM (Hard Water). Public water supply across this area is managed by Portsmouth Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in PO6. The lowest mineral concentration is recorded in sector PO6 1 at 250 PPM, whereas sector PO6 9 experiences higher mineral levels reaching 250 PPM.

Due to the hard water (250 PPM) in PO6, 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 PO6

Lowest mineral concentration

Softest
Sector PO6 1209 Postcodes • Hard
250 PPM17.5 °Clark

Hardest Sector in PO6

Highest mineral concentration

Highest Hardness
Sector PO6 95 Postcodes • Hard
250 PPM17.5 °Clark

All Postcode Sectors in PO6

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