UK Water Quality Report • 2026 Data

Water Hardness in CH1

Water supply analysis across 7 postcode sectors in CH1 (Severn Trent Water).

Outcode Avg Hardness143.6 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode CH1

Looking for water hardness metrics in CH1? Water supplied by Severn Trent Water in this outcode registers a baseline average of 143.6 PPM across 7 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in CH1. The lowest mineral concentration is recorded in sector CH1 6 at 45 PPM, whereas sector CH1 9 experiences higher mineral levels reaching 160 PPM.

Due to the moderately hard water (143.6 PPM) in CH1, 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 CH1

Lowest mineral concentration

Softest
Sector CH1 6176 Postcodes • Soft
45 PPM3.2 °Clark

Hardest Sector in CH1

Highest mineral concentration

Highest Hardness
Sector CH1 9129 Postcodes • Moderately Hard
160 PPM11.2 °Clark

All Postcode Sectors in CH1

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