Ghosts Bound To Pools & Tasked With Emptying Them

I have come across a few legends in the South West of England where restless ghosts were ritually bound to a body of water, condemned to stay there until they had completed an impossible task, such as emptying it with a small container which has a hole in it.

For an example see Cranmere Pool (Dartmoor)

There is also Hounds Pool (Dartmoor) and Dozmary Pool (Bodmin Moor).  Do you know of anymore and is this a tradition based in the Soith West or do we see similar stories in other regions?