UK Water Quality Report • 2026 Data

Water Hardness in EX21

Water supply analysis across 1 postcode sectors in EX21 (South West Water).

Outcode Avg Hardness40 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode EX21

For residents and businesses in outcode EX21, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that EX21 averages 40 PPM in mineral content, falling into the Soft Water classification.

Water chemistry can fluctuate across supply zones in EX21. The lowest mineral concentration is recorded in sector EX21 5 at 40 PPM, whereas sector EX21 5 experiences higher mineral levels reaching 40 PPM.

Since EX21 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 EX21

Lowest mineral concentration

Softest
Sector EX21 5285 Postcodes • Soft
40 PPM2.8 °Clark

Hardest Sector in EX21

Highest mineral concentration

Highest Hardness
Sector EX21 5285 Postcodes • Soft
40 PPM2.8 °Clark

All Postcode Sectors in EX21

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