Clevedon Water Hardness & Quality Report (2026)

South West Water provides drinking water to Clevedon in North Somerset, drawing from a mix of sources. The supply for Clevedon itself is a combination of upland surface water, sourced from rivers like the River Dart and Exe, and reservoirs such as Roadford and Wimbledall, along with groundwater from boreholes in the East Devon area. Water undergoes treatment at facilities like Littlehempston and Chittering Somerton, employing processes such as coagulation, filtration, chlorination, and fluoridation.

The watershed's geology plays a significant role in water characteristics. The upland moors of Dartmoor and Exmoor, with their peaty soils, contribute to soft surface water that is naturally low in minerals. Conversely, groundwater drawn from boreholes in the East Devon region passes through Permian and Triassic sandstone and limestone aquifers. These sedimentary rocks allow rainwater to dissolve calcium and magnesium, resulting in a more mineralized supply that imparts a slightly hard character to the water reaching Clevedon when mixed with the softer surface water.

This slightly hard water supply in Clevedon might lead to some minor scale buildup over time in appliances like kettles and showerheads, potentially reducing their efficiency and slightly increasing energy consumption. While boilers and hot water systems are generally less affected than they would be in areas with very hard water, homeowners can mitigate scale by regularly descaling with vinegar or using limescale filters on taps. Given the slight hardness, a whole-house water softener is usually not necessary, as the benefits may not outweigh the costs and maintenance involved. South West Water consistently meets regulatory standards set by the Drinking Water Inspectorate.