Evesham Water Hardness & Quality Report (2026)

Severn Trent Water provides Evesham's water supply, utilizing a combination of groundwater from boreholes tapping the Mercian aquifer and surface water drawn from the River Avon catchment. This mixed source feeds into treatment facilities like the Evesham and Stratford-upon-Avon plants. Here, raw water undergoes rigorous processes including coagulation, filtration, chlorination, and fluoridation to ensure it meets drinking water standards before reaching residents. The utility manages a vast network, serving millions across the Midlands, with Evesham's supply benefiting from this blended approach for enhanced reliability.

The geology beneath Evesham plays a significant role in the water's character. The region sits over the Mercian Group aquifer, a formation rich in Triassic sandstones and conglomerates interbedded with mudstones. Crucially, the presence of Carboniferous limestone and Triassic formations means that as rainfall percolates through the ground, it dissolves significant amounts of calcium and magnesium. This process, occurring within permeable limestone and chalky soils, naturally contributes to the hard water profile of the supply, a characteristic amplified by the surface water drawn from the River Avon watershed.

This moderately hard to hard water can lead to limescale buildup in household appliances and plumbing. You'll notice it in kettles, boilers, and showerheads, where scale accumulation reduces efficiency and can shorten the lifespan of these items. Dishwashers, washing machines, and hot water systems are particularly susceptible to scale insulating heating elements and clogging pipes. Homeowners often find regular descaling with common household items, installing magnetic conditioners, or fitting a whole-house water softener beneficial. Severn Trent advises cleaning taps regularly and using filtered water for appliances to help mitigate buildup, while also noting consistent pH levels and managing occasional nitrate levels through blending.