Distributed by the Government of Canada Depository Services Program (Weekly checklist 2011-25). Issued also in French under title: État et tendances de la qualité de l'eau pour les nutriments dans les bassins versants importants du Canada, sommaire technique.

Includes bibliographical references.

Introduction -- Nutrients in Canadian waterways: concerns and threats -- Data selection and nutrient analyses -- National overview of status and trends -- Regional and site-specific status and trends by drainage area -- Conclusions and recommendations -- Appendix -- References.