Water Hardness Breakdown for Sector TW98 7
Serving the community across sector TW98 7, mains tap water is supplied by Thames Water. Across the 30 postcodes within this distribution boundary, the baseline water hardness currently averages 280 PPM, falling into the very hard threshold.
Because water supplied by Thames Water in TW98 7 contains 280 PPM of dissolved minerals, limescale accumulation is an active maintenance factor. Taps, thermostatic shower cartridges, and boiler coils require periodic descaling to prevent flow constriction.
Water distributed by Thames Water in this southeastern/eastern catchment is predominantly drawn from underground chalk and limestone aquifers. As rainwater filters through deep subterranean chalk strata, it naturally dissolves high concentrations of calcium bicarbonate, resulting in the consistent 280 PPM profile recorded across sector TW98 7.
In everyday household use, calcium and magnesium ions in 280 PPM water bind with soaps, producing chalky bathroom residue and scum on your morning cuppa. In sector TW98 7, washing laundry or dishware requires +35% extra laundry detergent to overcome calcium neutralization. For personal grooming, individuals with dry skin or eczema sensitivity may experience skin tightness after showers in this very hard water environment.
Calibrating appliance water softening systems in TW98 7 prevents etched glassware and heating element burnouts. Based on Thames Water's official 280 PPM rating, Bosch dishwashers should be set to H05. Consult the interactive equipment guide below for custom brand settings across all 30 postcodes.