Book excerpt: The International Air Quality Advisory Board established an Expert Group on Monitoring to examine environmental monitoring programs across the entire Canada-US transboundary region. This report summarizes the activities of the Expert Group. It begins with discussion of the integrated monitoring approach explored by the Expert Group. Section 2 analyzes the monitoring project inventory sponsored by the Board and how the inventory could be improved. Section 3 describes a series of workshops and meetings designed specifically to address monitoring issues of regional interest that affect the transboundary environment. The primary foci of these events were: the St. Croix River area; effects of air pollution on forests, and water quality monitoring; human health issues; and environmental concerns on the prairies. Section 4 offers observations on the workshop process. Section 5 provides examples of integrated monitoring programs and activities, mainly in Canada and the United States. Section 6 outlines general conclusions based on the workshop results. The final section contains the Expert Group's recommendations regarding the adoption of integrated monitoring and related matters.