The report is the Eleventh Progress Report to the International Joint Commission prepared by the Advisory Boards on Control of Pollution of Boundary Waters under reference in the Great Lakes Region. Emphasis is being placed on control and monitoring of industrial waste systems with the objective of preventing 'spills' and minimizing irregularities in operation. The programs established for investigating possible future fish kills and for warning water plant operators should keep those handling pollutional materials on the alert. Significant progress has been made by industry in providing waste treatment facilities, and treatment for all domestic sewage should soon be a reality.