Executive Summary: Sector SP6 9 vs Sector SW1A 1
Comparing tap water mineral concentration between Sector SP6 9 (Bournemouth Water) and Sector SW1A 1 (Thames Water) reveals a water hardness difference of 5 PPM. Sector SP6 9 has softer water at 270 PPM (Hard) 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 270 PPM).
For home appliance setup, Bosch dishwasher water softener settings should be calibrated accordingly: Sector SP6 9 requires setting H05 whereas Sector SW1A 1 recommends setting H04.