UK Water Quality Report • 2026 Data

Water Hardness in S12

Water supply analysis across 4 postcode sectors in S12 (Yorkshire Water).

Outcode Avg Hardness135 PPMModerately Hard Water
Regional Quality Overview

Water Supply Analysis: Outcode S12

Looking for water hardness metrics in S12? Water supplied by Yorkshire Water in this outcode registers a baseline average of 135 PPM across 4 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in S12. The lowest mineral concentration is recorded in sector S12 2 at 110 PPM, whereas sector S12 4 experiences higher mineral levels reaching 160 PPM.

Due to the moderately hard water (135 PPM) in S12, 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 S12

Lowest mineral concentration

Softest
Sector S12 2242 Postcodes • Moderately Soft
110 PPM7.7 °Clark

Hardest Sector in S12

Highest mineral concentration

Highest Hardness
Sector S12 4256 Postcodes • Moderately Hard
160 PPM11.2 °Clark

All Postcode Sectors in S12

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