Charlton Kings Water Hardness & Quality Report (2026)

South West Water serves the residents of Charlton Kings in Gloucestershire, drawing its supply from upland reservoirs and rivers, notably those found within the Dartmoor and Exmoor watersheds. The treatment process for this water, which includes coagulation, filtration, and chlorination, occurs at facilities like the Bristol treatment works, which is responsible for supplying the wider Cheltenham area, including Charlton Kings. This reliance on surface water from these high moorland regions, rather than groundwater sources like boreholes found in areas such as East Devon, contributes to the characteristically soft nature of the water delivered to homes.

The geological landscape around Charlton Kings is shaped by ancient rock formations. The underlying geology consists of Carboniferous and Devonian granite, interspersed with peat-rich moorlands dating back to the Permian period. These rock types are largely impermeable, meaning water doesn't easily seep through them. Consequently, as rainwater collects in the reservoirs and rivers of Dartmoor and Exmoor, it picks up very few dissolved minerals, particularly calcium and magnesium. This limited mineral dissolution, combined with the natural acidity of the peaty soils, results in the exceptionally soft water quality characteristic of this supply.

Because the water in Charlton Kings is very soft, homeowners will likely notice minimal buildup of limescale in appliances such as kettles, boilers, and washing machines. This translates to less frequent maintenance and potentially longer lifespans for these devices. You'll find that soap and detergents lather easily, requiring less product for effective cleaning. Taps and fixtures tend to remain free of unsightly scale deposits. While a water softener isn't necessary, a mild cleaning agent can help manage any minor soap scum that might form due to the low mineral content. South West Water adheres to strict drinking water standards, with typical pH levels around 7.5 to 8.5, and robust monitoring ensures lead and copper levels remain well below regulatory limits.