The Lake Michigan Mass Balance Study measured and modeled the concentrations of representative pollutants within important compartments of the Lake Michigan ecosystem. Objectives of the study were to:

• Estimate pollutant loading rates,
• Establish a baseline to gauge future progress
• Predict the benefits associated with load reductions, and
• Further understand ecosystem dynamics.

• Lake Michigan Mass Balance Study PCB Modeling Report (PDF)(621 pp, 17 MB, December 2006)
• Results of the Lake Michigan Mass Balance Study: Polychlorinated Biphenyls and trans-Nonachlor Data Report (PDF)(300 pp, 5 MB, April 2004)
• Results of the Lake Michigan Mass Balance Study: Mercury Data Report, February 2004 (PDF)(171 pp, 3 MB, February 2004)
• Results of the Lake Michigan Mass Balance Study: Atrazine Data Report (PDF)(91 pp, 2 MB, December 2001)