Broadstone Water Hardness & Quality Report (2026)

South West Water provides drinking water to Broadstone, a community in Dorset, drawing from a vast network that also serves Devon, Cornwall, and parts of Somerset. The primary sources are moorland reservoirs like Roadford, Wistman's, and Burrator, alongside rivers such as the River Tamar and Exe. Water treatment is carried out at facilities including Crownhill and Chitterwood, where processes like coagulation, filtration, and disinfection are employed to ensure the water meets stringent UK standards before reaching more than 1.7 million customers. These watersheds span the elevated moorlands of Dartmoor and Bodmin Moor.

The geology underpinning these water sources consists of granite uplands and metasedimentary rocks dating back to the Devonian period. The impermeable nature of this bedrock, combined with overlying peat bogs and thin soils, encourages rapid runoff of rainwater. This swift flow means the water picks up very few dissolved minerals, resulting in a naturally soft water character. Unlike areas with significant limestone deposits, these formations do not contribute substantial amounts of calcium and magnesium, keeping the natural hardness levels low.

Because the water is naturally soft, homeowners in Broadstone will notice minimal limescale buildup in appliances like kettles, irons, and washing machines. Pipes and hot water systems are less prone to efficiency-reducing scum or scale deposits. Regular descaling treatments are generally not required; a simple periodic wipe-down of appliances is often sufficient. Installing a water softener isn't recommended, as it could potentially remove beneficial minerals and might even lead to pipe corrosion. The water quality consistently meets Drinking Water Inspectorate standards, with a typical pH range of 7.0-8.0, and lead levels are well below the regulatory limit following extensive replacement programs.