Unlike most other American rivers, the water affairs of the four-state area that is drained -and served- by the Delaware River and its many tributaries are the responsibility of a regional planning-operating instrument of government, the Delaware River Basin Commission. Since it was organized in December 1961, the Commission has endeavored to bring into harmonious interdependence all the demands, competing as well as compatible, that a highly developed and crowded society can impose on a river. The Commission has worked toward this sometime difficult goal daily and in a mutually helpful atmosphere with the agencies of the five signatories of the Delaware Basin Compact that gave life to the Commission.This is a report on the developments in this effort during the year ending June 30, 1967, a period marked by headlined situations as well as vital but less-heralded activities.