UK Water Quality Report • 2026 Data

Water Hardness in DN37

Water supply analysis across 4 postcode sectors in DN37 (Anglian Water).

Outcode Avg Hardness310 PPMVery Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode DN37

Analyzing water quality disclosures across all 4 postcode sectors in outcode DN37 reveals an average water hardness of 310 PPM (Very Hard Water). Public water supply across this area is managed by Anglian Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in DN37. The lowest mineral concentration is recorded in sector DN37 0 at 310 PPM, whereas sector DN37 9 experiences higher mineral levels reaching 310 PPM.

Due to the very hard water (310 PPM) in DN37, 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 H07 (Max Salt)) 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 DN37

Lowest mineral concentration

Softest
Sector DN37 0281 Postcodes • Very Hard
310 PPM21.7 °Clark

Hardest Sector in DN37

Highest mineral concentration

Highest Hardness
Sector DN37 9223 Postcodes • Very Hard
310 PPM21.7 °Clark

All Postcode Sectors in DN37

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