There remains significant uncertainty about the exact scope and timing of climate change-related impacts on water resources, but the National Water Program and its partners need to assess emerging climate change information, evaluate potential impacts of climate change on water programs, and identify needed responses. This report is an initial effort to evaluate how best to meet our clean water and safe drinking water goals in the context of a changing climate. The ideas and response actions outlined here are the product of a cooperative effort among the EPA water program managers in national and Regional offices. A wide range of stakeholders participated in initial ¿listening session¿ meetings. Illustrations.