The U.S. Geological Survey (USGS) collected data during and after Superstorm Sandy to determine its impacts on water quality and streamflow. Sampling afterward has included more in-depth testing for nutrients, pesticides, and bacteria. Results can be found online.

New Jersey sampling sites include the Delaware River near Trenton and the Raritan River near Queens Bridge. In Pennsylvania, researchers are sampling the Chesapeake Bay. In Maryland, samples are being taken from the Potomac River, the Eastern Shore, and the Susquehanna River at Conowingo Dam. Crews are also sampling northern Virginia and Washington, D.C., sites. Read more.