I have an above ground pool. The bees are a good 150 yards away. Sometimes I see them drinking from the small leaks on the plumbing of the filter/pump and from the sides of the pool. (It's an old pool) There seems to be times I find a few drowned in the pool, and then there are no more drowned in the pool. :?
The neighbor told me once they go for his dog dish. Then there are times I have no idea where they are going for water. I would think the ones that found the pool leaks would keep going to that place, bur they don't. Perhaps they find something better.