UK Water Quality Report • 2026 Data

Water Hardness in CV21

Water supply analysis across 5 postcode sectors in CV21 (Severn Trent Water).

Outcode Avg Hardness160 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode CV21

Analyzing water quality disclosures across all 5 postcode sectors in outcode CV21 reveals an average water hardness of 160 PPM (Moderately Hard Water). Public water supply across this area is managed by Severn Trent Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in CV21. The lowest mineral concentration is recorded in sector CV21 1 at 160 PPM, whereas sector CV21 9 experiences higher mineral levels reaching 160 PPM.

Due to the moderately hard water (160 PPM) in CV21, 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 H02) 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 CV21

Lowest mineral concentration

Softest
Sector CV21 1307 Postcodes • Moderately Hard
160 PPM11.2 °Clark

Hardest Sector in CV21

Highest mineral concentration

Highest Hardness
Sector CV21 956 Postcodes • Moderately Hard
160 PPM11.2 °Clark

All Postcode Sectors in CV21

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