Hard water solutions in Southampton
Southampton has hard water. Here is what that does to your home, what genuinely fixes it, what only appears to, and who can fit it locally.
Hard
Southern Water, Portsmouth Water
Water in Southampton
- Southampton has hard water from Hampshire chalk sources, typically in the 250 to 310 mg/l CaCO₃ range.
- Supply is split between Southern Water and Portsmouth Water depending on the exact location, though both are hard.
- The River Test and River Itchen chalk streams are major local sources and are themselves internationally significant habitats, which makes abstraction a live local issue.
- The city's substantial marine and port sector includes commercial premises with filtration requirements — galley and catering water on vessels among them — that are unusual outside port cities.
- Hampshire's rural fringe includes properties on private supplies where UV and sediment treatment matter, in contrast to the mains-supplied city.
You have hard water — scale protection is worth having.
The World Health Organization notes that water at 200 mg/l or above will produce scale, and that is where this band begins. At this level limescale is a recurring cost rather than an occasional nuisance, and many boiler manufacturers require scale protection to keep the warranty valid. A softener is worth costing out properly.
Who supplies Southampton
Water company boundaries do not follow council boundaries. Check your postcode for the supplier at your address.