Broadfield Water Hardness & Quality Report (2026)

South East Water supplies the Broadfield residential area in Crawley, West Sussex, UK, serving over two million customers across Kent, Sussex, Surrey, and Hampshire. The primary water source comes from groundwater boreholes tapping into the Chalk aquifer, with supplementary supply from reservoirs like Bewl Water and Ardingly Reservoir. Water undergoes treatment at key facilities such as the Burghfield and Gatwick plants. Here, the water is filtered, disinfected using chloramine, and fluoridated to meet stringent drinking water standards. The catchment areas include the Weald and North Downs watersheds.

The geological landscape is dominated by the Cretaceous Chalk Group, a chalky limestone aquifer characterized by numerous fissures. This formation, in turn, is covered by clay vales and sands, which allow rainwater to percolate deeply. As the water travels through the rock, it dissolves minerals, particularly calcium and magnesium from the chalk's carbonate-rich composition. This natural process, typical of limestone regions, results in a hard water supply with naturally high alkalinity from bicarbonates, distinguishing it from softer waters found in peatier, upland areas.

Homeowners in Broadfield might notice scale buildup in appliances like kettles, boilers, and showerheads, which can reduce their efficiency and lifespan. Laundry may appear less bright, and soap won't lather as readily, potentially leading to increased detergent use. Simple measures such as regular descaling with vinegar or installing scale filters on taps can help manage these effects. For those with particularly hard water, a whole-house water softener is often recommended to protect plumbing and improve cleaning effectiveness. However, it's advisable to rinse softened water before drinking due to the added sodium. The water quality generally meets UK Drinking Water Inspectorate standards, with a typical pH between 7.5 and 8.5, buffered by the natural mineral content.