Side-by-Side Water Hardness Calculator

Compare Water Hardness

Analyze real-time PPM, Clark degrees, limescale risk, and dishwasher salt settings between any two UK postcode sectors.

Water Quality Comparison Analysis

Executive Summary: Sector LS1 1 vs Sector SW1A 1

Comparing tap water mineral concentration between Sector LS1 1 (Yorkshire Water) and Sector SW1A 1 (Thames Water) reveals a water hardness difference of 165 PPM. Sector LS1 1 has softer water at 110 PPM (Moderately Soft) compared to Sector SW1A 1 at 275 PPM (Hard).

Limescale risk and boiler heating efficiency vary based on these mineral levels. Households in Sector SW1A 1 experience higher heating element degradation and kettle scale accumulation due to elevated calcium carbonate density (275 PPM vs 110 PPM).

For home appliance setup, Bosch dishwasher water softener settings should be calibrated accordingly: Sector LS1 1 requires setting H01 whereas Sector SW1A 1 recommends setting H04.

Sector LS1 1 has 165 PPM LOWER water hardness than Sector SW1A 1

Lower PPM indicates softer water, reduced limescale risk, and lower detergent usage.

Water Metric
Sector LS1 1Outcode: LS1
Sector SW1A 1Outcode: SW1A
Hardness (PPM)
110 PPM
275 PPM
Clark Degrees
7.7 °Clark
19.3 °Clark
Classification
Moderately Soft
Hard
Bosch Salt Setting
H01
H04
Water Supplier
Yorkshire Water
Thames Water
Postcodes Covered
16 postcodes
66 postcodes