UK Water Quality Report • 2026 Data

Water Hardness in DL5

Water supply analysis across 5 postcode sectors in DL5 (Northumbrian Water).

Outcode Avg Hardness130 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode DL5

Looking for water hardness metrics in DL5? Water supplied by Northumbrian Water in this outcode registers a baseline average of 130 PPM across 5 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in DL5. The lowest mineral concentration is recorded in sector DL5 4 at 130 PPM, whereas sector DL5 9 experiences higher mineral levels reaching 130 PPM.

Due to the moderately hard water (130 PPM) in DL5, 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 DL5

Lowest mineral concentration

Softest
Sector DL5 4234 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in DL5

Highest mineral concentration

Highest Hardness
Sector DL5 96 Postcodes • Moderately Soft
130 PPM9.1 °Clark

All Postcode Sectors in DL5

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