Kenilworth Water Hardness & Quality Report (2026)

Severn Trent Water serves Kenilworth in the West Midlands, drawing its supply from a mix of sources. Groundwater comes from aquifers such as the Permo-Triassic sandstones, while surface water originates from the River Avon watershed, which includes reservoirs like Draycote Water. Water undergoes treatment at facilities including Finham Wastewater Treatment Works and various groundwater treatment sites before reaching residents, all while adhering to strict UK drinking water standards. The utility provides quality updates, with the latest reports available for specific postcodes as of March 31, 2026.

The geology underpinning Kenilworth's water supply is key to its mineral content. The River Avon watershed flows through Triassic sandstones and the Mercia Mudstone Group formations. The main aquifer, the Mercian Superficial Aquifer, contains the Sherwood Sandstone, known for its porous nature. As water filters through this rock, it dissolves minerals like calcium and magnesium from underlying limestone and dolomite layers. This geological process is responsible for the water's characteristically moderate to hard mineralisation.

Homeowners in Kenilworth often notice the effects of moderately hard to hard water, particularly limescale buildup in appliances like kettles, boilers, and showerheads. This scale can reduce the efficiency and lifespan of household items, including washing machines and dishwashers, by insulating heating elements and obstructing pipes. Regular descaling with vinegar or using a magnetic conditioner can help manage this. For persistent issues, installing a water softener is often recommended to protect appliances and improve how effectively soap lathers. Severn Trent Water reports consistent pH levels between 7.0 and 8.0, with PFAS levels below detection limits and no significant lead or copper concerns in recent monitoring zones monitored in recent areas.