UK Water Quality Report • 2026 Data

Water Hardness in DL1

Water supply analysis across 6 postcode sectors in DL1 (Northumbrian Water).

Outcode Avg Hardness130 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode DL1

For residents and businesses in outcode DL1, understanding local water chemistry is essential for appliance longevity and limescale prevention. Our environmental data shows that DL1 averages 130 PPM in mineral content, falling into the Moderately Hard Water classification.

Water chemistry can fluctuate across supply zones in DL1. The lowest mineral concentration is recorded in sector DL1 1 at 130 PPM, whereas sector DL1 9 experiences higher mineral levels reaching 130 PPM.

Due to the moderately hard water (130 PPM) in DL1, 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 DL1

Lowest mineral concentration

Softest
Sector DL1 1238 Postcodes • Moderately Soft
130 PPM9.1 °Clark

Hardest Sector in DL1

Highest mineral concentration

Highest Hardness
Sector DL1 9189 Postcodes • Moderately Soft
130 PPM9.1 °Clark

All Postcode Sectors in DL1

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