UK Water Quality Report • 2026 Data

Water Hardness in SY18

Water supply analysis across 2 postcode sectors in SY18 (Hafren Dyfrdwy).

Outcode Avg Hardness135 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode SY18

For residents and businesses in outcode SY18, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that SY18 averages 135 PPM in mineral content, falling into the Moderately Hard Water classification.

Water chemistry can fluctuate across supply zones in SY18. The lowest mineral concentration is recorded in sector SY18 9 at 130 PPM, whereas sector SY18 6 experiences higher mineral levels reaching 140 PPM.

Due to the moderately hard water (135 PPM) in SY18, 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 H01) 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 SY18

Lowest mineral concentration

Softest
Sector SY18 91 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in SY18

Highest mineral concentration

Highest Hardness
Sector SY18 6225 Postcodes • Moderately Hard
140 PPM9.8 °Clark

All Postcode Sectors in SY18

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