UK Water Quality Report • 2026 Data

Water Hardness in EX18

Water supply analysis across 1 postcode sectors in EX18 (South West Water).

Outcode Avg Hardness40 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode EX18

For residents and businesses in outcode EX18, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that EX18 averages 40 PPM in mineral content, falling into the Soft Water classification.

Water chemistry can fluctuate across supply zones in EX18. The lowest mineral concentration is recorded in sector EX18 7 at 40 PPM, whereas sector EX18 7 experiences higher mineral levels reaching 40 PPM.

Since EX18 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 EX18

Lowest mineral concentration

Softest
Sector EX18 7197 Postcodes • Soft
40 PPM2.8 °Clark

Hardest Sector in EX18

Highest mineral concentration

Highest Hardness
Sector EX18 7197 Postcodes • Soft
40 PPM2.8 °Clark

All Postcode Sectors in EX18

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