An Amended Decree of the Supreme Court of the United States, entered June 7, 1954, authorized diversions of water from the Delaware River Basin and provided for releases of water from three New York City reservoirs-Pepacton, Cannonsville, and Neversink-to the upper Delaware River. The Decree stipu-lated that these diversions and releases are to be made under the supervision and direction of the Delaware River Master. The Decree also stipulated that reports on Delaware River operations be made to the Court not less frequently than annually. This report documents operations from December 1, 2006, to Novem-ber 30, 2007, or the 2007 River Master report year. The report also presents information on the quality of water in the Delaware Estuary during the report year.