https://www.lbc.co.uk/news/devon-cryptosporidium-outbreak-school-closed-hundreds-ill-latest-updates/
This is an awful situation in Devon, but why on earth is people buying bottled water in a situation where the water is undrinkable "panic buying" - it seems like perfectly sensible buying to me? Every single person needs the equivalent of multiple bottles of water every day, and I would say those who have the ability to buy it are actually being fairly considerate in leaving stocks of the bottled water being provided by the water companies for those who need it.
Not all stocking up is panic buying! It is sometimes a very rational response to the situation you're in.