UK Water Quality Report • 2026 Data

Water Hardness in LL35

Water supply analysis across 1 postcode sectors in LL35 (Hafren Dyfrdwy).

Outcode Avg Hardness140 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode LL35

For residents and businesses in outcode LL35, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that LL35 averages 140 PPM in mineral content, falling into the Moderately Hard Water classification.

Water chemistry can fluctuate across supply zones in LL35. The lowest mineral concentration is recorded in sector LL35 0 at 140 PPM, whereas sector LL35 0 experiences higher mineral levels reaching 140 PPM.

Due to the moderately hard water (140 PPM) in LL35, 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 LL35

Lowest mineral concentration

Softest
Sector LL35 099 Postcodes • Moderately Hard
140 PPM9.8 °Clark

Hardest Sector in LL35

Highest mineral concentration

Highest Hardness
Sector LL35 099 Postcodes • Moderately Hard
140 PPM9.8 °Clark

All Postcode Sectors in LL35

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