Willowsong has created a curative from the flowers you brought her.
'Good, you have brought the flowers I need. The evils of Man tainted this water with poison. The power of nature will make it pure once more.
'Now return this bucket to Staddle and pour its contents into the well. The water inside will retain its curative properties and drive out any remaining poison.
'Be careful. These lands are wild and home to many dangerous beasts.'
Staddle's well is north and west of the Silverwater Spring.
Willowsong told you to return the bucket of water to Staddle's well.
Longo is standing by the well in the town square of Staddle.
You did as Willowsong instructed. Tell Longo Daegmund that the well should be safe to drink from again.