u/Ectopic_elm

I've noticed something in my local supermarkets in South London and I'm wondering if there's a cultural explanation. It seems that a disproportionate number of people buying large quantities of bottled water are from Black African or Caribbean backgrounds. I may be completely mistaken or influenced by my own observations, but I'm curious whether there are any cultural, historical, or practical reasons that might explain this. Has anyone come across any research or community perspectives on this?