Excessive eutrophication of lakes is a serious international problem. There has been a great need for a comprehensive information source usable in developing future rehabilitation/protection programs. The state-of-the-art review represents an attempt to delineate the accomplishments of lake restoration-related activities worldwide. Information was acquired through an extensive mail survey (about 8,000 entries), cooperation of several international journals/newsletters, and a systematic literature search including foreign as well as domestic materials. The contents of the report consist of five major divisions: (1) Identification, description and present utility of the various techniques; (2) compilation and description of individual past and/or ongoing restoration experiences (almost 600 accounts); (3) project methodology; (4) name and address of people providing pertinent information (over 300 respondents); and (5) literature references (more than 800 documents).