We drink it, wash with it and curse it when it falls from the sky. But how much do we really know about our water supply?
The man in charge of it, Scottish Water's Chief Executive Alex Plant, talks to Martin about supply, demand, rising bills and why we need to think seriously about how much water we use.
Scotcast is the BBC's Scottish news podcast, with Martin Geissler, Natalie Higgins and Laura Miller.
Get in touch with us by emailing scotcast@bbc.co.uk
