UK Water Quality Report • 2026 Data

Water Hardness in EX4

Water supply analysis across 10 postcode sectors in EX4 (South West Water).

Outcode Avg Hardness40 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode EX4

Looking for water hardness metrics in EX4? Water supplied by South West Water in this outcode registers a baseline average of 40 PPM across 10 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in EX4. The lowest mineral concentration is recorded in sector EX4 0 at 40 PPM, whereas sector EX4 9 experiences higher mineral levels reaching 40 PPM.

Since EX4 enjoys soft water (40 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 EX4

Lowest mineral concentration

Softest
Sector EX4 024 Postcodes • Soft
40 PPM2.8 °Clark

Hardest Sector in EX4

Highest mineral concentration

Highest Hardness
Sector EX4 996 Postcodes • Soft
40 PPM2.8 °Clark

All Postcode Sectors in EX4

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