UK Water Quality Report • 2026 Data

Water Hardness in GU17

Water supply analysis across 2 postcode sectors in GU17 (Scottish Water).

Outcode Avg Hardness25 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode GU17

Looking for water hardness metrics in GU17? Water supplied by Scottish Water in this outcode registers a baseline average of 25 PPM across 2 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in GU17. The lowest mineral concentration is recorded in sector GU17 0 at 25 PPM, whereas sector GU17 9 experiences higher mineral levels reaching 25 PPM.

Since GU17 enjoys soft water (25 PPM), residents generally do not need dishwasher salt or heavy-duty limescale descalers. Standard detergent dosages are sufficient for laundry and dishwashing. Review the individual postcode sectors below to get precise dishwasher salt settings and limescale recommendations.

Softest Sector in GU17

Lowest mineral concentration

Softest
Sector GU17 0160 Postcodes • Soft
25 PPM1.8 °Clark

Hardest Sector in GU17

Highest mineral concentration

Highest Hardness
Sector GU17 9141 Postcodes • Soft
25 PPM1.8 °Clark

All Postcode Sectors in GU17

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