Guides
Tap water
Evidence-led explainers on tap water, with every figure sourced.
Hard water and limescale
What hardness actually is, why it costs you money, why it has no health effect, and which of the many products sold to deal with it actually work.
Private water supplies
Wells, springs and boreholes are not regulated or treated like mains water. If you are on one, the responsibility for its safety is yours.