Chaddesden Water Hardness & Quality Report (2026)

Severn Trent Water supplies Chaddesden, a suburb of Derby in the East Midlands, drawing from a mix of sources. Groundwater from aquifers like the Permo-Triassic sandstone aquifer and surface water from rivers such as the Derwent are treated at facilities including the Derwent Valley and Milton treatment plants. This supply network serves Derby and the wider Derbyshire county, ultimately providing essential mains water to millions across the Midlands. The region's watershed is part of the Trent River Basin, characterized by geology that significantly influences water chemistry.

The underlying geology is dominated by Triassic sandstones and Cretaceous limestones, which create highly productive aquifers. As rainwater percolates through these rock formations, it dissolves minerals like calcium and magnesium, particularly from the carbonate-rich limestone and gypsum-bearing layers. This natural process imbues the groundwater with dissolved solids, contributing to the water's moderately hard to hard characteristics, typical of many areas in central England influenced by such geological features.

This moderately hard to hard water supply means homeowners may notice scale buildup in appliances like kettles, boilers, and showerheads, which can impact their efficiency and lifespan. Regular descaling with household products like vinegar can help manage this, as can installing scale filters. For those frequently encountering limescale issues, a whole-house water softener is often recommended to protect plumbing fixtures and improve the lathering of soaps and detergents. Severn Trent reports that its water consistently meets UK drinking water regulations, with recent data up to March 2026 showing low lead and copper levels and no PFAS exceedances. The pH typically ranges between 7.5 and 8.5.