Bourne Water Hardness & Quality Report (2026)

Anglian Water supplies Bourne, a market town on the edge of the Lincolnshire Fens in south Lincolnshire — the birthplace of Hereward the Wake and home of a historic Victorian railway spa — from Lincolnshire Limestone (Jurassic Great Oolite and Lincolnshire Limestone Formation) aquifer boreholes in the oolite limestone belt west of Bourne, treated at Bourne Water Treatment Works. At 175 mg/L (12.3°Clark), Bourne's water is moderately hard, consistent with the calcareous Jurassic Oolitic Limestone (Great Oolite) character that defines groundwater quality throughout the south Lincolnshire limestone belt.

Bourne sits at the foot of the Lincolnshire Edge — the ridge of Jurassic Oolitic Limestone (Lincolnshire Limestone) that extends northward from Stamford through Ancaster to Lincoln. This porous oolite formation forms a productive aquifer yielding moderately hard calcium bicarbonate groundwater typical of Jurassic oolite formations across the East Midlands. Anglian Water draws on this Lincolnshire Limestone aquifer to supply Bourne and the surrounding south Lincolnshire communities, producing 175 mg/L with TDS 416.9 mg/L — characteristic of the oolite limestone groundwater belt.

At 175 mg/L, limescale is a noticeable household concern in Bourne. Kettles benefit from descaling every four to six weeks. The combi-boiler should be fitted with a scale inhibitor and serviced annually. Washing-up liquid requires slightly more product than in softer areas. Taps and shower heads develop moderate limescale deposits within two to three weeks; a monthly wipe with white vinegar keeps fixtures in good condition. The moderately hard supply reflects Bourne's position on the famous Lincolnshire Limestone belt — the same Jurassic oolite that has built the walls of so many Lincolnshire churches and market town buildings for centuries.