High Peak Water Hardness & Quality Report (2026)

High Peak, a borough in Derbyshire's East Midlands, receives its water primarily from Severn Trent Water, with some areas served by South Staffordshire Water. The supply originates from a mix of sources within the Peak District. These include groundwater drawn from limestone aquifers and boreholes, as well as surface water from reservoirs like those in the Upper Derwent Valley, namely Derwent, Howden, and Ladybower. Water is treated at facilities such as Rivelin Works and various borehole sites before distribution to approximately 90,000 residents across towns like Glossop, Buxton, and Chapel-en-le-Frith. The watershed itself spans the rugged Peak District uplands, part of the Pennine Chain, with drainage feeding into the River Derwent and Goyt systems.

The underlying geology significantly influences the water's character. Key features include Carboniferous Limestone aquifers, which are interspersed with Millstone Grit sandstones. This geological makeup fosters a generally hard water supply because the soluble limestone readily dissolves minerals, particularly calcium and magnesium, as groundwater percolates through its fissures and conduits. While overlying peat moorlands contribute softer, acidic surface runoff to reservoirs, the primary draw from these mineral-rich limestone aquifers dictates the water's moderately mineralised chemistry, giving it its characteristically hard nature.

Homeowners in High Peak may notice moderate limescale buildup affecting appliances like kettles, boilers, and showerheads, which can reduce their efficiency and lifespan. You might also observe detergent residue or spotting on glassware from dishwashers and washing machines. To combat this, regular descaling with vinegar, installing limescale filters on taps, and wiping fixtures after use are helpful maintenance steps. Many households find a water softener beneficial, especially in older properties with narrow pipes, to prevent scaling and extend the life of their appliances. The water quality in High Peak zones meets UK standards, with a typical pH range of 7.2-8.0 due to limestone buffering, and full compliance for lead and copper under Water Supply Regulations 2016.