UK Water Quality Report • 2026 Data

Water Hardness in SP5

Water supply analysis across 5 postcode sectors in SP5 (Wessex Water).

Outcode Avg Hardness190 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode SP5

Analyzing water quality disclosures across all 5 postcode sectors in outcode SP5 reveals an average water hardness of 190 PPM (Moderately Hard Water). Public water supply across this area is managed by Wessex Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in SP5. The lowest mineral concentration is recorded in sector SP5 2 at 40 PPM, whereas sector SP5 5 experiences higher mineral levels reaching 290 PPM.

Due to the moderately hard water (190 PPM) in SP5, 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 SP5

Lowest mineral concentration

Softest
Sector SP5 2227 Postcodes • Soft
40 PPM2.8 °Clark

Hardest Sector in SP5

Highest mineral concentration

Highest Hardness
Sector SP5 5206 Postcodes • Hard
290 PPM20.3 °Clark

All Postcode Sectors in SP5

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