Kendal Water Hardness & Quality Report (2026)

United Utilities Water Limited supplies Kendal, Cumbria, drawing water mainly from upland reservoirs like Haweswater Reservoir and Thirlmere in the Lake District. These significant surface water sources, making up about 90% of the supply, are managed through treatment facilities including Thirlmere Intake Works and Nameless Dam Treatment Works. A small amount of groundwater from boreholes supplements this supply, particularly during peak demand periods. The water is treated to meet stringent UK drinking water standards before reaching residents in Kendal and surrounding areas within the South Lakeland district. The catchment area extends across the uplands of the Lake District National Park.

The geological landscape around Kendal is dominated by Borrowdale Volcanic Group rocks, which are essentially impermeable lavas and tuffs from the Ordovician period. These ancient volcanic formations, covered by thin, peaty soils, prevent significant mineral leaching into the water, resulting in naturally very soft water. In the lower valleys, supplementary water comes from boreholes tapping into Permian St Bees Sandstone aquifers. While this sandstone is more soluble and can introduce some minerals, the overwhelming contribution from the soft upland sources means the blended water remains predominantly soft.

Because Kendal's water is naturally soft, you'll find minimal scale buildup in appliances like kettles, pipes, and water heaters. This means less maintenance is typically needed for your home's plumbing and heating systems. Soap will lather easily, and you're less likely to see spotting on dishes after washing. There's no need to install a water softener, as doing so could actually increase sodium levels in your water unnecessarily. While routine descaling is rare, keeping your dishwasher temperature around 60°C will help it run efficiently. United Utilities monitors the water closely, ensuring it meets Drinking Water Inspectorate standards, with occasional low levels of iron or manganese from the peaty sources being effectively managed through the treatment process.