Stonehaven Water Hardness & Quality Report (2026)

Scottish Water supplies Stonehaven, the coastal Aberdeenshire town at the foot of the Mearns lowland south of Aberdeen — the county town of the former Kincardineshire, with a working harbour, a fine cliff-top Dunnottar Castle (dramatically photographed on its sea stack), and a proud community with one of Scotland's most spectacular Hogmanay Fireball Ceremonies — from Fetteresso Reservoir in the Aberdeenshire upland catchment near Stonehaven, treated at Fetteresso Water Treatment Works. At 19.5 mg/L (1.4°Clark) and a TDS of just 33.4 mg/L, Stonehaven's water is exceptionally soft — among the softest in Scotland — consistent with the impermeable Dalradian Metamorphic (schist and quartzite) and Devonian Old Red Sandstone upland catchment of the Mearns that contributes almost no calcium to surface runoff.

Stonehaven draws supply from Fetteresso Reservoir in the Mearns upland — a catchment of Dalradian metamorphic schist, quartzite, and Devonian Old Red Sandstone that weathers only very slowly and contributes minimal calcium and other dissolved solids to surface water. The result is 19.5 mg/L with TDS 33.4 mg/L — exceptionally soft water consistent with the range across the Aberdeenshire upland Scottish Water supply tier, from Stonehaven through the Mearns to the Deeside communities on the eastern Highland fringe.

At 19.5 mg/L, limescale is essentially not a domestic concern in Stonehaven. Descaling the kettle a couple of times a year is all that is required. The combi-boiler has negligible calcium scaling risk. Washing-up liquid lathers very readily with minimal product. Taps and shower heads accumulate virtually no limescale deposits. In older Stonehaven properties with lead service pipes, residents should follow Scottish Water's advice to run the cold tap briefly before drinking, as exceptionally soft, low-TDS water has elevated plumbo-solvent potential — a standard precautionary recommendation across the soft Aberdeenshire supply zone.