Water Hardness Breakdown for Sector S21 2
Public water quality records published by Severn Trent Water indicate that tap water across postcode sector S21 2 registers an average mineral hardness of 160 PPM (mg/L of calcium carbonate). Serving approximately 31 postal units in the S21 area, this sector falls within the official moderately hard water classification.
Tap water in sector S21 2 averages 160 PPM, presenting a manageable mineral level for the 31 local postcodes. Heating equipment operates with negligible efficiency loss (4% – 7%), though routine quarterly inspection of kettle elements remains beneficial.
Supplies in this zone are managed through a composite blend of river abstraction points and upland reservoirs operated by Severn Trent Water. The mineral balance fluctuates moderately between seasons, averaging 160 PPM (11.2° Clark) across the 31 postal sectors in this supply matrix.
Household water chemistry in S21 2 (11.2° Clark) dictates everyday cleaning efficiency. Water supplied by Severn Trent Water at this level necessitates medium detergent volume with routine machine descaling, while inline shower head filters can help sensitive skin by mitigating mineral residue during washing.
To preserve internal ion-exchange resin chambers, domestic dishwashers operating in sector S21 2 should be calibrated precisely for 160 PPM. For Bosch, Neff, and Siemens appliances, the recommended salt dosing index is H02. Explore our interactive configuration tool below to verify exact settings for Beko, Miele, and Whirlpool units.