UK Water Quality Report • 2026 Data

Water Hardness in LL31

Water supply analysis across 1 postcode sectors in LL31 (Dŵr Cymru Welsh Water).

Outcode Avg Hardness45 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode LL31

Analyzing water quality disclosures across all 1 postcode sectors in outcode LL31 reveals an average water hardness of 45 PPM (Soft Water). Public water supply across this area is managed by Dŵr Cymru Welsh Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in LL31. The lowest mineral concentration is recorded in sector LL31 9 at 45 PPM, whereas sector LL31 9 experiences higher mineral levels reaching 45 PPM.

Since LL31 enjoys soft water (45 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 LL31

Lowest mineral concentration

Softest
Sector LL31 9281 Postcodes • Soft
45 PPM3.2 °Clark

Hardest Sector in LL31

Highest mineral concentration

Highest Hardness
Sector LL31 9281 Postcodes • Soft
45 PPM3.2 °Clark

All Postcode Sectors in LL31

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