In October 1974 the pilot study of the NATO/CCMS was completed with the publication of 'Inland Water Pollution', NATO/CCMS Report 36. Canada was the pilot country for the study and Belgium, France and the United States acted as co-pilots. The study had two main goals: (1) to demonstrate ways in which countries can cooperate in reducing water pollution to their mutual benefit, and (2) to develop improved techniques and concepts for water quality management that would be of broad interest to member countries in dealing with internal and international problems of freshwater pollution. To assess the study effectiveness, this post-evaluation was carried out. This report represents the results of a member country poll, centered around the original study recommendations, regarding measures which countries have taken to manage the quality of their inland waters.