UK Water Quality Report • 2026 Data

Water Hardness in LL42

Water supply analysis across 1 postcode sectors in LL42 (Hafren Dyfrdwy).

Outcode Avg Hardness140 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode LL42

Looking for water hardness metrics in LL42? Water supplied by Hafren Dyfrdwy in this outcode registers a baseline average of 140 PPM across 1 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in LL42. The lowest mineral concentration is recorded in sector LL42 1 at 140 PPM, whereas sector LL42 1 experiences higher mineral levels reaching 140 PPM.

Due to the moderately hard water (140 PPM) in LL42, 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 LL42

Lowest mineral concentration

Softest
Sector LL42 1151 Postcodes • Moderately Hard
140 PPM9.8 °Clark

Hardest Sector in LL42

Highest mineral concentration

Highest Hardness
Sector LL42 1151 Postcodes • Moderately Hard
140 PPM9.8 °Clark

All Postcode Sectors in LL42

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