Ealing Common Water Hardness & Quality Report (2026)

Thames Water Utilities Limited supplies Ealing Common, located in the London Borough of Ealing, Greater London, UK. This water comes from a mixed source, drawing from the River Thames and its tributaries, alongside groundwater drawn from the Chalk aquifer through boreholes. While Mogden Sewage Treatment Works handles wastewater, drinking water purification occurs at facilities such as the Hampton Water Treatment Works and several other groundwater plants across the region. The utility serves over 15 million customers throughout Greater London and neighboring counties. The Thames Water catchment area spans the Thames Valley watershed, reaching from the Cotswolds all the way to the North Sea.

The region's geology is dominated by the Cretaceous Chalk aquifer, a significant karst system that allows groundwater to become rich in minerals. This aquifer is covered by Eocene clays and sands, which play a role in how water replenishes the underground supply. Because this limestone-based geology readily dissolves carbonates, the water ends up being hard, with high levels of calcium and magnesium. This is then blended with river water that has moderate mineral content.

In areas with hard water like Ealing Common, scale buildup is a common problem, particularly affecting kettles, boilers, and showerheads. This buildup not only reduces efficiency but can also shorten the lifespan of these appliances. You might find that washing machines and dishwashers require more detergent to achieve the same cleaning results, and some residents notice their skin and hair feel drier. To combat scale, regular descaling with vinegar, using scale filters, or employing magnetic treatments can help. For very hard conditions, installing a water softener is often recommended to prevent limescale damage and extend the life of your appliances. Thames Water consistently meets Drinking Water Inspectorate standards, with typical pH levels ranging from 7.2 to 7.8.