The U.S. Geological Survey National Streamflow Information Program provides detailed information on Upper Delaware River water temperature, discharge, and height at the Barryville and Callicoon gages and on the Lackawaxen River at Rowland.
For the most up do date information on the projected water level for the Upper Delaware River visit the National Weather Service's Advanced Hydrologic Prediction Service. This page will provide a map of the river gages in the Binghamton, NY area. To see a graph of the current and predicted water levels for the Upper Delaware River you will need to click the Barryville or Callicoon buttons near the lower right hand corner of the map.
The Delaware River Basin Commission's flood information page provides links to additional National Weather Service sites, past flood events on the Delaware River, federal flood links, and kid-friendly flood links.