Aston Water Hardness & Quality Report (2026)

Aston, the inner north Birmingham suburb famous as the birthplace of Aston Villa FC, receives its water from Severn Trent Water. Supply to north and east Birmingham draws upon a blend of soft upland water imported via the Elan Valley Aqueduct from the Welsh mid-Wales reservoirs, supplemented by abstraction from local Triassic Mercia Mudstone and Permo-Triassic sandstone aquifers beneath the Birmingham basin. Treatment is carried out at Frankley Water Treatment Works and distributed through an extensive urban mains network. The high total dissolved solids (TDS 684.2 mg/L) point to a notably elevated groundwater fraction in the Aston supply zone, raising hardness well above Birmingham's softer central areas.

The Triassic Mercia Mudstone underlying the Birmingham basin contains interbedded evaporite layers — including Keuper gypsum and anhydrite — that readily dissolve into percolating groundwater, adding calcium, magnesium and sulphate ions. When this mineral-laden groundwater is blended with the softer Elan Valley surface water, the resulting mix is considerably harder than zones dominated by reservoir supply alone. The Permo-Triassic sandstone aquifer itself also contributes calcium carbonate from secondary cementation, explaining the 233.5 mg/L hardness reading.

At 233.5 mg/L Aston's water is hard and limescale is a daily reality. Limescale accumulates inside kettles quickly — expect a visible white layer within a fortnight, requiring descaling at least monthly with a citric acid or white vinegar solution. Combi-boilers and dishwashers benefit from scale-inhibitor treatment, and heating-element appliances such as steam irons should be filled with filtered or softened water where possible. Using more washing-up liquid than you think you need is a natural response to hard water; consider a water softener for the full household supply to protect your plumbing long-term.