Originally Posted by
Barrheadlass
I’ve read so many articles about coffee and tea being unsafe to drink on planes, well, the water too, as the water sources can be dubious and the tanks dirty.
The tanks are subject to a sanitisation schedule. Potable water supply at airports is audited frequently and there is a long list of criteria that have to be met including chlorination, and sanitation and storage of the equipment used. If these are not met the airport is put on a "banned list". You would be surprised at some of airports in first world countries where BA will not uplift water!