Numerous bodies of water can be found throughout Aroostook National Wildlife Refuge (i.e. vernal pools, bogs, emergent wetlands, streams, rivers, ponds and lakes). The refuge is actively working to improve the quality of wetlands that were previously altered by military activities. The refuge is engaged in restoring numerous streams by removing culverts to improve fish passage and improving the quality of stream corridors through soil remediation. Water control structures have been installed to provide waterfowl, shorebirds and wading birds places to nest and raise young.