Once Lothar explains his plan about the well, and its connexion to the plague (something Raffy never learned about in peasant school), the previously haggard Raffy comes to life with renewed vigour in his eyes. "Well let's go dredge it right away!" he says enthusiastically, as if he's forgotten all about Pilserier. However he does remember to keep an eye on the smaller of their two elves to make sure she does not slip off on her own while they gather the needed supplies.
He does not express any fear of the water or sickness, but does make sure they pick up some protective charms as part of their supply gathering.